RuPAC-2010 - List of Keywords (electron)

A B C D E F G H I K L M O P Q R S T U V W

electron

Paper	Title	Other Keywords	Page
TUCHA01	Accelerator Aspects of the Precision Mass Measurement Experiments at the VEPP-4M Collider with the KEDR Detector	polarization, collider, resonance, positron	11
	S. A. Nikitin BINP SB RAS, Novosibirsk
	One of most important constituents of the mass measurement experiments at colliders is a precision absolute beam energy calibration. Two methods for particle energy measurement are realized at the electron-positron collider VEPP-4M: one based on the resonant depolarization technique and another using the Back Compton Scattering. KEDR detector measurements of the J/Psi-, Psi' – mesons and the tau-lepton masses performed with the help of these methods is better in accuracy now in the world. Peculiarities of the beam energy calibraton as well as of the mass measurement experiments are represented in the viewpoint of requirements on beam parameters and accelerator systems.
	Slides

TUCHC01	Concepts for Rasing RF Breakdown Threshold by Using Multi-Moded Cavities	acceleration, coupling, cathode, radiation	24
	S. V. Kuzikov IAP/RAS, Nizhny Novgorod J. L. Hirshfield Yale University, Physics Department, New Haven, CT Y. Jiang Yale University, Beam Physics Laboratory, New Haven, Connecticut S. Kazakov, M. E. Plotkin, A. A. Vikharev Omega-P, Inc., New Haven, Connecticut
	Funding: Work sponsored by in part by US Department of Energy, Office of High Energy Physics (2009). Two multi-mode cavity designs aimed at increasing accelerating gradient are developed. The cavity of the first type has circular cross-section but allows excitation of several equidistantly-spaced eigenmodes by a bunched drive beam. This multi-mode excitation allows to reduce exposure time of the cavity surface by high field, which in this case occupies smaller area. This feature promises to provide more than 30% raise of the threshold in a 3-mode cavity. The second cavity type is axisymmetric but longitudinally asymmetric, and is excited in one mode at the fundamental frequency and the other at the second harmonic. Superposition of these modes always produces a low field on one cavity wall and a high field on the other, with the latter directed so as to prevent electron emission. This feature is also expected to raise the breakdown threshold. Computations show that a structure using such cavities might support an accelerating gradient up to 47% greater than that for a structure using similar single-mode cavities.
	Slides

TUPSA006	Experiment on RF Heating of the Copper Cavity - the Imitator of the CLIC High-Gradient Accelerating Structure	controls, vacuum, radiation, induction	47
	S. N. Sedykh, E. V. Gorbachev, A. K. Kaminsky, N. I. Lebedev, E. A. Perelstein, N. V. Pilyar, T. V. Rukoyatkina, V. V. Tarasov JINR, Dubna, Moscow Region S. V. Kuzikov, N. Yu. Peskov, M. I. Petelin, A. A. Vikharev IAP/RAS, Nizhny Novgorod
	The facility for joint experiments of JINR-IAP RAS has been commissioned to investigate the lifetime dependence of the CLIC high-gradient accelerating structure* on the surface damage by repetitive high-power RF pulses. The facility is based on the 30 GHz JINR free-electron maser, which uses an electron beam of the induction linear accelerator LIU-3000 *. Intermediate optical observations of the central ring allowed us to control the process of the damage evolution. The first damage of the copper surface have been observed after 16000 pulses with the pulse heating of 240°C. After 63000 pulses the damage of the surface of the oxygen-free copper cavity became strong enough to cause regular breakdowns inside the test cavity. I. Wilson – CERN AB-2004-100, CLIC Note 617, Dec. 2004, 12pp. ** A. V.Elzhov et al. - Nucl. Instr. and Meth., A, Vol. A528, 2004, pp.78-82.

TUPSA009	Interbunch Energy Exchange in the Accelerating Scheme with Uniform Charge Distribution	extraction, acceleration, vacuum, focusing	53
	I. L. Sheynman LETI, Saint-Petersburg A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio
	Funding: Ministry of Education and Science of Russia, “Scientific and scientific-pedagogical personnel of innovative Russia” and the Russian Foundation for Basic Research (09-02-00921) The efficiency of energy transformation in multi bunch accelerating schema with uniform charge distribution is considered. The transmitted energy to accelerated bunch taking into account driving bunch exit of relativism and settling them on the walls of the waveguide is determined. It is shown that accounting losses charge of generator beam increases passed accelerated bunch energy by eliminating exhaust bunches.

TUPSA010	Attosecond and Femtosecond Electron Bunches Obtainable Upon Field Emission in a Combined Quasi-static and Laser Electric Field	cathode, laser, radiation, bunching	56
	V. A. Papadichev LPI, Moscow
	Short pulses of electrons of femtosecond and attosecond duration are necessary for numerous applications: studying fast processes in physics, chemistry, biology and medicine. It was shown that it is possible to generate electron bunches due to field emission of T/2 - T/8 duration (T is the period of laser oscillation), i.e., 400 as to 20 fs with neodymium or carbon dioxide lasers. Currents of 10 mA to 10 A can be obtained from single-spike cathode and up to 10 kA with a multi-spike cathode. Further bunching occurs due to velocity modulation in the bunch by laser electric field resulting in 6 as for neodymium laser and 120 as for carbon dioxide laser*. Transverse focusing of such bunches is discussed. Heating of spikes for single-pulse regime is several degrees and therefore it is possible to generate a sequence of electron bunches (up to 100 – 500 pulses). They can be used in diffractometry and after acceleration to 3 – 4 MeV for generation of short pulses of VUV and soft X-ray radiation in periodic fields or as a relativistic mirror. Influence of space-charge force are studied using simple analytical solutions and methods to compensate it are proposed. P. Emma. Proc. EPAC04, p. 225, Lucerne, Suisse. V. A.Papadichev. Proc. EPAC08, p. 2812, Genoa, Italy. * V. A.Papadichev. Proc. EPAC08, p. 2815, Genoa, Italy.

TUPSA011	Hollow Photocathode Concept for E-gun	laser, cathode, emittance, vacuum	59
	M. A. Nozdrin, N. Balalykin, V. Minashkin, G. Shirkov, E. Syresin, G. V. Trubnikov JINR, Dubna, Moscow Region J. Huran Slovak Academy of Sciences, Institute of Electrical Engineering, Bratislava
	Photocathodes are the key devices for high-quality electron bunches generation. Such bunches are needed as initial electron source in contemporary linear accelerators. In all cases there are several important parameters: fast response time, quantum efficiency, long lifetime, low thermal emittance, minimal effect on RF properties of the accelerating system. In this paper the new concept of the photocathode is proposed – hollow (absolutely transparent for the laser beam) photocathode. Such cathode geometry allows quantum efficiency rising due to surface photoelectric effect which is concerned with normal to material surface wave electric field multiplier. Usability investigation experimental results for both hollow photocathodes made of bulk materials (Nb, Cu) and by thin-film technology (CsITe and diamond-like carbon as film on copper substrate) are given. After Nb hollow photocathode irradiation by a laser beam (Lambda = 266 nm, tau pulse = 15 ns, frequency 1 Hz) a charge of 64nC was extracted. Backside irradiation radically simplifies laser beam targeting on emitting surface, accelerator equipment adjustment and allows photocathode working surface laser cleaning.

TUPSA012	TBA Scheme with Ion/Proton Driving Beam	proton, ion, synchrotron, positron	62
	A. A. Mikhailichenko CLASSE, Ithaca, New York E. G. Bessonov LPI, Moscow
	We are considering a Two Beam Accelerator scheme for electron-positron collisions with Ion/Proton driving beam. We compare the proposed scheme and the CLIC one coming to conclusion, that Ion/Proton driving TBA scheme looks more attractive. Existences of big proton accelerators in few laboratories give a new boost to reconsider the baseline for post LHC era. These labs are FERMILAB, BNL, CERN and IHEP at Protvino, Moscow region. Protvino could emerge as one advantageous place for resurrection of proton synchrotron in existing ~20-km long tunnel. This synchrotron was planned as a booster for 2x2 TeV UNK complex. * K. Hubner, CERN/PS 92-43(DI), CLIC Note No.176,1992. ** E. A. Perevedentsev, A. N. Skrinsky, Preprint BINP 79-80, Novosibirsk, 1979.

TUPSA013	The CDS Parameters for Proton Linac with Moderate Heat Loading	linac, coupling, septum, proton	65
	V. V. Paramonov RAS/INR, Moscow
	The Cut Disk Structure (CDS) was originally proposed for high energy linac in L-band or S-band frequency range. CDS combines simultaneously high coupling coefficient, high shunt impedance and small transverse dimensions. For lower particle velocity the structure loses in shunt impedance due to relatively thick partition with internal cooling channels. For moderate heat loading internal cooling is not necessary and partition thickness is limited only by mechanical rigidity. The structure equalizes in shunt impedance with another bi-periodical structures and another CDS advantages come in front. Calculated CDS parameters for proton linac are presented.

TUPSA014	Design of the Nuclotron Booster in the NICA Project	ion, booster, injection, dipole	68
	A. O. Sidorin, N. N. Agapov, A. V. Eliseev, V. Karpinsky, H. G. Khodzhibagiyan, A. D. Kovalenko, G. L. Kuznetsov, I. N. Meshkov, V. A. Mikhailov, V. Monchinsky, A. V. Smirnov, G. V. Trubnikov, B. Vasilishin JINR, Dubna, Moscow Region
	The main goal of the Nuclotron booster construction are following: accumulation up to 4*10⁺⁹ Au³²⁺ ions; acceleration of the ions up to energy of 600 MeV/u that is sufficient for stripping of the ions to the bare nucleus state; simplification of the requirements to the vacuum conditions in the Nuclotron; forming of the required beam emittance at the energy of 100 MeV/u with electron cooling system. The features of this booster, the requirement to the main synchrotron systems and their parameters are presented.

TUPSA015	Injector Complex of the NICA Facility	ion, rfq, linac, proton	71
	A. O. Sidorin, A. V. Butenko, E. D. Donets, E. E. Donets, V. V. Fimushkin, A. Govorov, V. Kobets, I. N. Meshkov, V. Monchinsky, G. V. Trubnikov JINR, Dubna, Moscow Region A. Belov RAS/INR, Moscow O. K. Belyaev, Yu. A. Budanov, A. P. Maltsev, I. A. Zvonarev IHEP Protvino, Protvino, Moscow Region V. V. Kapin MEPhI, Moscow
	The injection complex of the NICA facility consists of existing Alvarez-type linac LU-20, new heavy ion linac HILac, polarized and heavy ion sources. The LU-20 is under modernization now, the HILac will be constructed during coming years. Parameters of the accelerators are presented.

TUPSA018	Intercation of the Biomolecular Ions with the Electron Target in the Electrostatic Storage Ring	ion, target, storage-ring, resonance	80
	S. G. Shirkov JINR, Dubna, Moscow Region
	A nanostructure of the radiation damages is formed at an interaction of decelerated protons or carbon ions with DNA molecules at hadron therapy. A local interaction of the ion beam with the bimolecular structures in the human cells is defined mainly by parameters of the ion tracks. The track core is connected with ionization properties of the charged ion, its cross-section sizes are defined by the delta-electrons. The delta-electron energy varies statistically from several eV to few keV therefore they lead to substance ionization along their trajectory on a distance several nanometers from that point where they were produced. Interaction of the delta-electrons with DNA molecules and other biological structures is one of the important mechanisms realized in process of the hadron therapy. A study of interaction of the accelerated biomolecular ions with an electronic target in electrostatic storage ring was performed for modeling of an input of the delta-electrons in processes of the hadron therapy.

TUPSA027	The Compact Faraday Cup for Radiobiological Researches in IHEP Accelerators Beams	vacuum, ion, proton, acceleration	95
	A. V. Koshelev, Y. Antipov, G. A. Dantsevich, A. V. Larionov, V. S. Seleznev IHEP Protvino, Protvino, Moscow Region
	IHEP’s experts are currently working on the creation of a medical irradiation centre with beams of protons and carbon ions on the basis of an accelerating complex. Already existing accelerators I-100 - U-1,5 - U-70 are forming a complete chain capable of accelerating not only protons, but also, due to certain modifications, light deuteron and carbon nucleus. The compact autonomic Faraday cup which works in the atmospheric environment has been developed to measure currents in the accelerators beams. The device has a good electromagnetic protection. It is compact and allows to make measurements on any (from 600 mm long) open site of a beam line. Vacuum tests and work with biological samples on a beam of protons of I-100 accelerator have proved that the Faraday cup is meeting all the requirements.

TUPSA028	Calibration of the Electrostatic Beam Position Monitors for VEPP-2000	vacuum, pick-up, optics, synchrotron	98
	Yu. A. Rogovsky, I. Nesterenko BINP SB RAS, Novosibirsk
	The basic requirement for the VEPP-2000 Beam Position Monitor (BPM) is the measurement of the beam orbit with 0.1 mm precision. To improve the measurement accuracy, the response of the electrostatic BPMs (pickups) were mapped in the laboratory before they were installed in the VEPP-2000 ring. The wire method for the sensitivity calibration and position-to-signal mapping is used. The test stand consists of high frequency coaxial switches to select each pickup electrode, movable antenna to simulate the beam, signal source, spectrum analyzer to measure the pickup signals, and analysis software. This calibration showed possibility of required accuracy. During calibration the electrical center of the different BPMs was measured with respect to the mechanical center. Conversion between the BPM signal and the actual beam position is done by using polynomial expansions fit to the mapping data within ±6 mm square. Results for these portions of the calibration are presented.

TUPSA030	Beam Measurements With Visible Synchrotron Light on VEPP-2000 Collider	controls, collider, diagnostics, vacuum	104
	Yu. A. Rogovsky, D. E. Berkaev, A. N. Kyrpotin, I. Nesterenko, A. L. Romanov BINP SB RAS, Novosibirsk
	This paper describes beam diagnostics at VEPP-2000 collider, based on visible synchrotron light analysis. These beam instruments include: SR beamline and optics; acquisition tools and high resolution CCD cameras distributed around the storage ring to measure the transverse beam profile and its position in vacuum chamber; photomultiplier tubes (PMT) which enables beam current measurements; video system. Some applications of these measurement systems and their measurement results are presented.

TUPSA036	Advance of the Marginal Oscillator	resonance, feedback, induction, impedance	122
	V. G. Ryzhov MRTI RAS, Moscow
	The advance of the transistor marginal oscillator (TMO) circuits are considered. The various TMO circuits, the features of their functioning and the simple NMR magnetometers based on them are reviewed.

TUPSA039	HV Electron Cooler for the NICA Collider	acceleration, gun, cathode, collider	125
	I. N. Meshkov, E. V. Ahmanova, A. G. Kobets, R. Pivin, A. Yu. Rudakov, A. V. Smirnov, N. D. Topilin, Yu. A. Tumanova, S. Yakovenko JINR, Dubna, Moscow Region A. A. Filippov Allrussian Electrotechnical Institute, Moskow A. V. Philippov, A. V. Shabunov JINR/VBLHEP, Dubna, Moscow region
	The goal of the cooling system of the NICA collider is to meet the required parameters of ion beams in energy range of 1 - 4.5GeV/u that corresponds to the 0.5 - 2.5 MeV of the electron energy. The electron cooler project is developed according to the world experience of similar systems consruction. The main peculiarity of the electron cooler for the NICA collider is use of two cooling electron beams (one electron beam per each ring of the collider) that never has been done before. The acceleration and deceleration of the electron beams is produced by common high-voltage generator. The cooler consists of three tanks. Two of them contain acceleration/deceleration tubes and are immersed in superconducting solenoids. The third one contains HV generator. The scheme of the electron cooler, its main parameters and operation regime are presented.

WECHY01	Status and Prospects of the Novosibirsk FEL Facility	undulator, radiation, laser, free-electron-laser	133
	N. Vinokurov, E. N. Dementyev, B. A. Dovzhenko, A. A. Galt, Ya. V. Getmanov, B. A. Knyazev, E. I. Kolobanov, V. V. Kubarev, G. N. Kulipanov, L. E. Medvedev, S. V. Miginsky, L. A. Mironenko, V. K. Ovchar, B. Z. Persov, V. M. Popik, T. V. Salikova, M. A. Scheglov, S. S. Serednyakov, O. A. Shevchenko, A. N. Skrinsky, V. G. Tcheskidov, M. G. Vlasenko, P. Vobly, N. S. Zaigraeva BINP SB RAS, Novosibirsk
	Multiturn energy recovery linacs (ERL) looks very promising for making ERLs less expensive and more flexible, but have serious intrinsic problems. At this time only one multiturn ERL exists. This Novosibirsk ERL operates with two orbits and two free electron lasers now. The Novosibirsk terahertz radiation user facility provides 0.5 kW average power at 50 - 240 micron wavelength range. Different users work at six stations. Two another orbits and third free electron laser are under construction. The operation experience revealed specific problems of ERLs(especially, of multiturn ones). Some solutions were proposed recently.
	Slides

WECHY02	Kurchatov Synchrotron Radiation Source Facilities Modernization	wiggler, storage-ring, controls, injection	136
	V. Korchuganov, A. V. Anoshin, M. Blokhov, Y. A. Fomin, G. A. Kovachev, M. V. Kovalchuk, Y. V. Krylov, V. V. Kvardakov, V. V. Leonov, V. V. Martynenko, V. P. Moryakov, D. G. Odintsov, S. G. Pesterev, Yu. F. Tarasov, S. I. Tomin, V. Ushkov, A. G. Valentinov, A. Vernov, Y. L. Yupinov, A. V. Zabelin RRC, Moscow
	Kurchatov Synchrotron Radiation Source (KSRS) operates in the range of SR from VUV up to hard X-ray. Technical modernization of KSRS systems is under way. It includes a replacement of the power supplies and the nano- and micro-second generators by the new ones, the installation of the new third RF accelerator cavity on 2.5 GeV storage ring SIBERIA-2. The projects of the feedback system for the longitudinal coherent multi-bunch instabilities dumping and of the new sensitive electronics for pick-up stations on Siberia-2 storage ring start in 2010. Three 7.5 T wiggler beam lines were mounted and tested with SR beam in December 2009. The 7.5 T (19+2) poles SC wiggler and new 3 RF cavities are doing the KSRS spectrum harder and intensive. The program tools for KSRS operation are introduced in accelerator control system with a new electronics. The new scheme of top-up energy injection placed outside of Siberia-2 storage ring tunnel is carried out. The report describes a statistics works and plans on KSRS facilities.
	Slides

WECHB01	Radiation Sources at Siberia-2 Storage Ring	radiation, emittance, undulator, synchrotron	141
	N. V. Smolyakov, V. Korchuganov, S. I. Tomin RRC, Moscow
	At present synchrotron radiation, generated in uniform magnetic fields of bending magnets, is employed at Siberia-2 storage ring. In the near future most of the storage ring’s straight sections should be completed with different insertion devices (undulators, wigglers). In this paper, two projects of radiation sources at Siberia-2 storage ring are considered. The first one is in-vacuum short period mini-undulator, which is projected for generation of extremely bright X-ray beams. It is shown the feasibility of diffraction-limited in vertical direction X-ray source, which is to say that vertical emittance of the electron beam is equal to diffraction emittance of generated by undulator 2 KeV photon beam. The second source will utilize edge radiation, which is generated in the fringe fields of the bending magnets. Numerical simulations show that the edge radiation is more intensive in infrared – ultraviolet spectral range as compared with standard synchrotron radiation from regular part of bending magnet.
	Slides

WECHZ02	Progress with the 2 MeV Electron Cooler for COSY-Juelich/HESR	antiproton, vacuum, pick-up, target	147
	J. Dietrich, V. Kamerdzhiev FZJ, Jülich M. I. Bryzgunov, A. D. Goncharov, V. V. Parkhomchuk, V. B. Reva, D. N. Skorobogatov BINP SB RAS, Novosibirsk
	The 2 MeV electron cooling system for COSY-Juelich was proposed to further boost the luminosity even in presence of strong heating effects of high-density internal targets. The project is funded since mid 2009. Manufacturing of the cooler components has already begun. The space required for the 2 MeV cooler is being made available in the COSY ring. The design and construction of the cooler is accomplished in cooperation with the Budker Institute of Nuclear Physics in Novosibirsk, Russia. The 2 MeV cooler is also well suited in the start up phase of the High Energy Storage Ring (HESR) at FAIR in Darmstadt. It can be used for beam cooling at injection energy and is intended to test new features of the high energy electron cooler for HESR. The technical layout of the 2 MeV electron cooler is described and the status of component manufacturing is reported.

WECHZ03	Development of Electron Cooler Components for COSY	secondary-beams, gun, vacuum, proton	151
	V. V. Parkhomchuk, M. I. Bryzgunov, A. V. Bubley, V. G. Cheskidov, A. D. Goncharov, A. Kryuchkov, V. A. Polukhin, A. A. Putmakov, V. B. Reva, D. N. Skorobogatov BINP SB RAS, Novosibirsk
	Design, production and experiments with prototype of the 2 MV COSY electron cooler commponents reported. The system for transfer 40 kW power along acceleration tube described.
	Slides

WECHZ04	Results of Electron Cooling Beam Studies at COSY	proton, injection, gun, emittance	156
	V. Kamerdzhiev, J. Dietrich FZJ, Jülich C. Boehme UniDo/IBS, Dortmund M. I. Bryzgunov, V. B. Reva BINP SB RAS, Novosibirsk A. G. Kobets, I. N. Meshkov, A. Yu. Rudakov, A. O. Sidorin JINR, Dubna, Moscow Region
	Beam studies dedicated to electron cooling and related problems were carried out at COSY in April 2010. The newly installed Ionization Profile Monitor was used to study the dynamics of longitudinal and transverse electron cooling. Friction force measurements were performed. Beam lifetime was measured for different injection parameters, electron currents and working points. Position and angle scans of the electron beam were also performed. Results of the recent beam studies are reported and the plans for future studies are discussed.

WECHZ05	Electron Cooling Experiments in CSR	ion, injection, accumulation, heavy-ion	161
	X. D. Yang, G. H. Li, J. Li, X. M. Ma, L. J. Mao, R. S. Mao, T. L. Yan, J. C. Yang, Y. J. Yuan IMP, Lanzhou V. V. Parkhomchuk, V. B. Reva BINP SB RAS, Novosibirsk
	The 7MeV/u 12C⁶⁺ ion beam was accumulated in CSRm,the ion beam accumulation dependence on the parameters of cooler was investigated experimentally. The 400MeV/u 12C⁶⁺ and 200MeV/u 129Xe⁵⁴⁺ was stored and cooled in CSRe, the cooling force was measured in different condition. The ion beam bunch length and transverse size were roughly measured.
	Slides

WECHC01	Advance in the LEPTA Project	positron, focusing, gun, vacuum	166
	A. G. Kobets, E. V. Ahmanova, M. K. Eseev, V. Karpinsky, V. I. Lokhmatov, V. N. Malakhov, I. N. Meshkov, V. Pavlov, A. Yu. Rudakov, A. A. Sidorin, S. Yakovenko JINR, Dubna, Moscow Region
	The progress since RuPAC'2008 in Low Energy Positron Toroidal Accumulator (LEPTA) project at JINR is reported. The significant development of the facility includes an increase of circulating beam life time, fabrication and commissioning of improved injection system, manufacturing of positron transfer channel, test of low energy positron injector and positron trap. First positron injection into the ring is under preparation.
	Slides

WECHC02	Electrostatic Storage Rings at the Ultra-low Energies Range	ion, storage-ring, antiproton, lattice	169
	A. I. Papash JINR, Dubna, Moscow Region C. P. Welsch The University of Liverpool, Liverpool
	Electrostatic storage rings have proven to be invaluable tools for atomic and molecular physics at the ultra-low energy range from 1 to 100 keV/A. Due to the mass independence of the electrostastic rigidity, these machines are able to store a wide range of different particles, from light ions to heavy singly charged bio-molecules. Reaction Microscope incorporated into a ring lattice is considered to be a new powerful tool to study high precision effects by multiple crossing of incident beam of ions with ultrasonic gas jet. To enable operation of Reaction Microscope one should provide very short bunches in the 1-2 nanosecond regime in order to pave the way for kinematically complete measurements of the collision dynamics of fundamental few-body quantum systems on the level of differential cross sections. However, earlier measurements at some rings showed strong limitations depending on beam intensity, probably linked to non-linear fields that cannot be completely avoided in such machines. In this contribution, we discuss common features of electrostatic storage rings and analyse rings performance.
	Slides

WEPSB002	JINR Activity in FEL	radiation, undulator, photon, laser	175
	E. Syresin, G. A. Chelkov, E. V. Ivanov, M. N. Kapishin, E. A. Matyushevskiy, N. A. Morozov, G. Shirkov, G. V. Trubnikov, M. V. Yurkov JINR, Dubna, Moscow Region O. I. Brovko JINR/VBLHEP, Moscow
	Different methods for diagnostic of ultrashort electron bunches are developed at JINR-DESY collaboration within the framework of the FLASH and XFEL projects. Photon diagnostics developed at JINR-DESY collaboration for ultrashort bunches are based on calorimetric measurements and detection of undulator radiation. The MCP based radiation detectors are effectively used at FLASH for pulse energy measurements. The infrared undulator constructed at JINR and installed at FLASH is used for longitudinal bunch shape measurements and for two-color lasing provided by the FIR and VUV undulators. The JINR also participates in development and construction of Hybrid Pixel Array Detector on the basis of GaAs sensors. The JINR develops a project which is aimed at preparation of conceptual project and simulations of accelerator complex, based on a 0.7 GeV superconducting linear accelerator, for applications in nanoindustry, mainly for extreme ultraviolet lithography using kW-scale Free Electron Laser (FEL) light source.

WEPSB003	Proposal for an Accelerator Complex for Extreme Ultraviolet Nanolithography Using kW-scale FEL Light Source	radiation, laser, free-electron-laser, undulator	178
	E. Syresin, N. Balalykin, U. A. Budagov, I. F. Lensky, A. G. Olshevsky, G. Shirkov, A. P. Sumbaev, G. V. Trubnikov JINR, Dubna, Moscow Region M. V. Yurkov DESY, Hamburg
	The project is aimed at construction of accelerator complex, based on a 0.7 GeV superconducting linear accelerator, for applications in nanoindustry, mainly for extreme ultraviolet lithography using kW-scale Free Electron Laser (FEL) light source. The project involves construction of a 0.7 GeV superconducting linear accelerator to produce coherent FEL radiation for extreme ultraviolet nanolithography at a wavelength of 13.5 nm and an average radiation power of 0.5 kW. The application of kW-scale FEL source permits realizing EUV lithography with 22 nm, 16 nm resolutions and beyond. The project for construction of an accelerator complex for EUV lithography is based on the technology realized on FEL FLASH (Free Electron Laser in Hamburg) facility at DESY (Hamburg).

WEPSB004	Self-stimulated Undulator Radiation Sources	undulator, radiation, storage-ring, emittance	181
	E. G. Bessonov, M. V. Gorbunkov, A. L. Osipov, A. V. Vinogradov LPI, Moscow A. A. Mikhailichenko CLASSE, Ithaca, New York
	The self-stimulated undulator radiation (UR) source is based on a quasi-isochronous storage ring, undulators installed in its straight sections and mirrors installed at both sides of undulators. Mirrors set an optical cavity. Period of oscillation of the UR wavelet (URW) emitted by every particle of the beam in the cavity coincides with common period of revolution of particles in storage ring. The URWs are accumulated in optical cavity by superposition one by another with the accuracy better than the wavelength of the UR. Intensity, which becomes higher by Q times, where Q is the quality factor of optical cavity. If conditions of synchronicity are violated weakly then properties of UR might be different: intensity will drop, monochromaticity will be increased. The selfstimulation of the spontaneous incoherent emission of radiation in the scheme can lead to an increase the seeding process for the SASE regime. The requirements to parameters of the beam and the degree of synchronicity are evaluated. Ordinary and compact storage rings using ordinary and laser undulators and generation of continuous, quasi-monochromatic radiation in the optical to X-ray regions are considered. E. G.Bessonov, M. V.Gorbunkov, A. A.Mikhailichenko, A. L.Osipov, Self-stimulated Emission of Undulator Radiation, http://arxiv.org/abs 10⁰³.3747 .

WEPSB005	Light Sources in Russia	storage-ring, radiation, ion, undulator	184
	E. G. Bessonov LPI, Moscow
	Possible ways of development of Light Sources based on charged particle accelerators and storage rings in Russia are discussed.

WEPSB007	The Expanded Program Tools for KSRS Operation with Archivation of Data	controls, vacuum, synchrotron, synchrotron-radiation	187
	E. V. Kaportsev RRC, Moscow
	The running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes the injection of electrons with energy 80 MeV from the linear accelerator in the booster storage ring Siberia-1, the accumulation of a electron current up to 400 mA and, then, electron energy ramping up to 450 MeV with the subsequent extraction of electrons in the main ring, storage ring Siberia-2, and accumulation there up to 300 mA, and at last the energy ramping up to 2.5 GeV. The control system is based on the distributed network of the processors operating technological systems of KSRS. The operational level of control system is realized as a local network of the personal computer. The database describing logic channels of the control, modes of the technological systems and the script of the running cycle of accelerating facilities is developed. The database for preservation of the received parameters of a complex is developed, the program of an archiving received with ADC data is developed. Logic channels of the control are a basis for creation of the user interface. The examples of realization of the software used in operative work KSRS are given. E. Kaportsev et al., The program tools for KSRS operation. Proceedings of RuPAC XX, Zvenigorod, Russia, 2008.

WEPSB018	Transverse Bunch Dynamics in Rectangular Dielectric Loaded Wakefield Accelerator	simulation, vacuum, focusing, controls	207
	A. Altmark, I. L. Sheynman LETI, Saint-Petersburg A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio
	Funding: Ministry of Education and Science of Russia, “Scientific and scientific-pedagogical personnel of innovative Russia” and the Russian Foundation for Basic Research (09-02-00921) Beam breakup (BBU) effects resulting from parasitic wakefields provide a potentially serious limitation to the performance of dielectric structure based accelerators. We report here on comprehensive numerical studies of transverse bunch dynamics in a rectangular dielectric loaded accelerating structure. The numerical part of this research is based on a particle-Green’s function beam dynamics code (BBU-3000) that we are developing. The code allows rapid, efficient simulation of beam breakup effects in advanced linear accelerators. It is shown that the LSE modes make its main contribution to the transverse deflecting force causing beam breakup in rectangular DLA structures. Results of test simulations are presented.

WEPSB021	RF Cavities HOM Longitudinal Instabilities at SR Source Siberia-2 in KCSR	storage-ring, injection, synchrotron, feedback	210
	V. I. Moiseev, V. Korchuganov, A. Vernov RRC, Moscow
	The electron beam parameters stability and its lifetime depend on the resonant excitation by RF cavities HOMs. The instability rising links with the temperature change, the sequent tune of RF cavities and the synchrotron tune change. Besides that the different intensity bunch distribution along the orbit influences strongly on the instability appearance. For the instabilities study and their identification the spectrum analyzing is used. The results of instabilities study at SR source Siberia-2 is presented in the report.

WEPSB022	Nonlinear Electron Beam Dynamics with Large Energy Spread in the Magnetic Mirror	linac, quadrupole, dipole, sextupole	212
	Y. A. Fomin, V. Korchuganov RRC, Moscow
	One of the features of new injection system for Kurchatov source of synchrotron radiation is an energy doubling of electron beam in forinjector – linear accelerator. The magnetic mirror provides 180° turn of electron beam into acceleration structure of linac for twice beam energy increase. This paper describes linear and nonlinear electron beam dynamics with energy 80 MeV and large energy spread in the magnetic mirror. The theoretical first- and second order optical functions of the magnetic mirror and the results of computer simulation of electron beam trajectories taking into account large energy spread and curvature of trajectories are presented. The structure of the magnetic mirror providing the achromatic and isochronous 180° turn of electron beam with 7% energy spread is suggested. Mutual influence of “the head” and “the tail” of electron beam when colliding in a straight section spaced in between linac output and magnetic mirror on particle losses and on the longitudinal and transversal parameters are considered.

WEPSB023	Electron Beam Dynamics with Space Charge in Linear Accelerator	linac, acceleration, space-charge, electromagnetic-fields	215
	Y. A. Fomin, V. Korchuganov RRC, Moscow
	This paper describes electron beam dynamics with space charge in existing linear accelerator of Kurchatov source of synchrotron radiation. The linac structure operates with standing wave mode pulse power and without particle prebuncher. The results of comparison of electron beam parameters at the linac output with and without space charge consideration are presented. Electron beam shaping process starting from continuous beam to bunched beam on initial stage of acceleration under the action both of linac RF field and particle space charge field is considered. The main attention gives to calculate particle space charge field of the electron beam, which bring in essential contribution into beam dynamics on initial stage of shaping and accelerating electron bunches. The results of computer simulation of the electromagnetic field into linac structure taking with the help of ANSYS code are presented.

WEPSB024	An Increasing of Electron Beam Lifetime at Injection Energy in SIBERIA-2 Storage Ring by Regulating of Betatron Coupling	injection, coupling, betatron, vacuum	218
	A. G. Valentinov, V. Korchuganov, Y. V. Krylov, Y. L. Yupinov RRC, Moscow
	A dedicated synchrotron light source SIBERIA-2 operates at 2.5 GeV with more than 100 mA electron current. An electron beam lifetime at this energy is defined now by vacuum conditions and exceeds 15 hours for 100 mA. The lifetime at injection energy 0.45 GeV is much lower – less than half an hour for typical current value 3–4 mA in singlebunch mode. An analysis of the lifetime value displayed a strong influence of Tushek effect in a presence of a horizontal aperture limitation. A dependence of the lifetime on different parameters (RF voltage, horizontal geometric and dynamic aperture, bunch current, betatron coupling value, electron energy) was analyzed. A betatron coupling regulation was recognized the easiest way to increase lifetime value at injection energy. It was done by two families of skew-quadrupole lenses. A 30–40% increasing of the lifetime was observed for different average values of a bunch current. Also a storing speed was raised because of slower decreasing of a stored current. The beam lifetime during energy ramping was also increased. It led to decreasing of current losses from 5-6% to 1.5–2% during energy rising from 0.45 GeV to 2.5 GeV.

WEPSB027	MiltP-M Code Upgrade	simulation, focusing, electromagnetic-fields, controls	227
	M. Gusarova, R. O. Bolgov, I. I.V. Isaev, S. V. Kutsaev, M. V. Lalayan, N. P. Sobenin MEPhI, Moscow L. V. Kravchuk RAS/INR, Moscow
	The new possibilities of MultP-M code for calculation of the multipactoring in radio frequency elements of charged particles accelerators taking into account influence of the external electric and magnetic fields are presented. Possibilities of the new module of three-dimensional display of geometry, electromagnetic fields and electron’s trajectories are shown. Example of multipactoring calculation in a transient mode in rectangular wave guide is considered

WEPSB028	Booster Electron Cooling System of NICA Project	ion, booster, emittance, gun	230
	A. V. Smirnov, E. V. Ahmanova, I. N. Meshkov, R. Pivin, A. Yu. Rudakov, V. I. Shokin, A. O. Sidorin, N. D. Topilin, Yu. A. Tumanova, S. Yakovenko JINR, Dubna, Moscow Region A. V. Shabunov JINR/VBLHEP, Moscow
	Nuclotron-based Ion Collider fAcility (NICA) is the new accelerator complex being constructed on the JINR site. A few cooling systems are considered for the NICA project – electron one for the Booster-synchrotron and for Collider rings – both electron and stochastic ones. The main goal of the Booster electron cooler is a decrease of the longitudinal emittance from the injection value to the necessary value for acceleration to Nuclotron. The designed electron cooling system for Collider rings have to prevent the emittance growth due to the intrabeam scattering and to keep the average luminosity on the constant value. The peculiarity of electron cooling systems is the using of superconducting solenoids to provide the beam transportation in cooling sections.

WEPSB029	Electron Gun and Collector for 2 Mev Electron Cooler for COSY	gun, cathode, vacuum, controls	233
	A. V. Ivanov, M. I. Bryzgunov, A. V. Bubley, V. M. Panasyuk, V. V. Parkhomchuk, V. B. Reva BINP SB RAS, Novosibirsk
	COSY storage ring will be upgraded in 2011 by installation of a new electron cooler. Electron cooling will reduce energy spread of protons and so improve the precision of internal target experiments. Some of the most important parts of this new electron cooler are the electron gun and the collector, and they must satisfy several rigid requirements. Electron gun must provide high perveance electron beam with low transversal temperature and variable beam profile. The gun control electrode assembled of four separate sections will provide measurements of beam envelope along the transport section of the cooler. Displacement of corresponding part of the beam may be observed if alternating voltage is applied to each section. Collector should have high perveance, low secondary emission coefficient, and small dimensions. Wien filter is supposed to be installed before the collector to satisfy these requirements. In this case we can use high perveance small-scale collector with axially-symmetric magnetic field; secondary electrons will be absorbed in Wien filter. An additional vacuum pumping must be provided in the collector design.

WEPSB034	Wideband BPM Electronics for the VEPP-4M Collider	positron, storage-ring, collider, pick-up	245
	E. A. Bekhtenev, G. V. Karpov BINP SB RAS, Novosibirsk
	New beam position monitor (BPM) FPGA-based electronics has been developed and tested at the VEPP-4M electron-positron collider. The VEPP-4M operates with two electron and two positron bunches. Compared to the old BPM electronics the new one can measure the position of each of four bunches with any BPM of storage ring including the BPMs near interaction point. Wide bandwidth of electronics (200 MHz) allows the separate measurements of electron and positron bunches with time interval between bunches up to 20 ns. BPM system works at two modes: slow closed orbit measurements and turn-by-turn measurements. We present details of system design and operation

WEPSB036	Experience on Operating High-Voltage Accelerators Designed in NIIEFA on Industrial Facilities Intended for Polymer Materials' Modification	radiation, cathode, extraction, shielding	251
	V. P. Ovchinnikov, V. P. Maznev, M. P. Svinin NIIEFA, St. Petersburg V. I. Alexandrov Izhevsk Plastics Plant JSC, Izhevsk E. M. Kolchin Insulating Polymer Materials, Ltd, Saint Petersburg
	High-voltage accelerators "Aurora-5" and "Electron-10" designed and manufactured in the D. V. Efremov Institute have been operated at the plastic-production plant in Izhevsk and the joint-stock company "Terma", St. Petersburg on facilities intended for production of polymer materials with specific properties due to radiation processing. The results of accelerators’ operation are considered in the paper. The annual operating time of each facility is 5-7 thousand hours, which meets the requirements for industrial equipment.

WEPSB041	CANopen Connected Power Supply Control Systems for the Electron Linacs	power-supply, controls, linac, storage-ring	266
	A. S. Chepurnov MSU SINP, Moscow V. N. Boriskin, A. A. Sarvilov, A. N. Savchenko, D. L. Stepin, G. N. Tsebenko, V. N. Vereshchaka NSC/KIPT, Kharkov I. V. Gribov MSU, Moscow A. F. Shamarin Marathon Ltd., Moscow
	Power supplies which feed magnetic systems of electron linac together with the control system are very critical parts of any linac. The quality of power supplies and control software defines safety of the accelerator operation, stability and cost of operation. One of the today’s tendencies in power supply system architecture is to use distributed CAN-connected power supplies with high level of local intellectual properties. These properties allow to achieve high stability, high safety of operation together with the specific features such as coil temperature check without any temperature sensors. Such programmable power supplies with the intellectual CANopen controller have been designed for the specific accelerator applications. The control system software was adapted to operate with CANopen protocol. Marathon's IPP-1/100 & IPP-4/35 power supplies with CANopen* are used now within the control systems of LU-60m and LU-10 linacs. 3200 hours of continues operation were achieved since the year 2008. * V. N.Boriskin et. al. POWER SUPPLY CONTROL SYSTEM FOR THE LINAC OF THE "NESTOR" STORAGE RING/ Proceedings of RuPAC 2008, Zvenigorod, Russia, 2008, pp.252-254.

THCHA02	Recovery Process Stability Study in Energy Recovery Accelerator	linac, microtron, coupling, free-electron-laser	283
	V. G. Kurakin LPI, Moscow
	Energy recovery technique in rf accelerator based applications allows to save rf power and reduce radioactive background as well. In this operation mode used beam is directed back to the accelerator in decelerating rf phase and returns back its kinetic energy to rf field. Thus, rf generator that feeds linac covers cavities walls rf losses only and those part of beam kinetic energy that is used for useful effects production as well. Vector sum of three fields – induced in the linac by an external rf source, accelerated and decelerated beams – determines energy and phase of the beam at linac exit, and together with beam return path optics amplitude and phase of decelerated bunches and hence third component of mentioned sum. In the case of positive sign of this feedback and sufficient amplification in the closed loop just described instability takes place. The main equations that determine beam-rf cavity interaction in energy recovery rf accelerator are derived, single mode approximation being used. Expressions for small deviation from steady state are obtained followed by stability analysis. Results of calculation for increments of instability presented and discussed.
	Slides

THCHB02	SCRF Development at TRIUMF	linac, acceleration, ion, heavy-ion	292
	V. Zvyagintsev, B. Amini, C. D. Beard, R. J. Dawson, T. Emmens, K. Fong, A. Grassellino, P. R. Harmer, D. Kishi, P. Kolb, A. Koveshnikov, C. Laforge, D. Lang, M. P. Laverty, R. E. Laxdal, R. Leewe, D. Longuevergne, M. Marchetto, A. K. Mitra, T. C. Ries, I. Sekachev, R. W. Shanks, B. S. Waraich, F. Yan, Q. Zheng TRIUMF, Vancouver R. Edinger PAVAC, Richmond, B. C. R. S. Orr, W. Trischuk University of Toronto, Toronto, Ontario
	TRIUMF started SCRF development with the superconducting heavy ion linear accelerator project, ISAC-II, in 2000. Since that time much work has been completed for development, prototyping and testing. The ISAC-II project was successfully completed and we now have in operation 40 superconducting bulk Nb QWR cavities assembled in eight cryomodules. The last twenty cavities, just completed, were produced by PAVAC Industries Inc. of Richmond BC; the first superconducting accelerator cavities produced in Canada. In 2007 TRIUMF started development towards a 50MeV electron superconducting linear accelerator to be used as a driver to produce radioactive ion beams through photofission. The accelerator is based on TTF/ILC elliptical bulk Nb cavities technology. Results, experience and plans of the SCRF program at TRIUMF will be discussed.
	Slides

THCHC01	Development and Production of Superconducting and Cryogenic Equipment and Systems for Accelerators by IHEP	cryogenics, dipole, quadrupole, vacuum	295
	S. Kozub, A. I. Ageev, I. Bogdanov, E. Kashtanov, A. P. Orlov, V. A. Pokrovsky, P. A. Shcherbakov, L. S. Shirshov, I. Slabodchikov, V. Sytnik, L. Tkachenko, S. Zinchenko, V. Zubko IHEP Protvino, Protvino, Moscow Region
	Superconducting and cryogenic programs at IHEP were got a powerful upsurge in the early eighties of the last century within the framework of the UNK project. More than hundred model superconducting magnets and the pilot batch of UNK superconducting dipoles and quadrupoles were produced and tested with the help of cryogenic test facilities built for this purpose. Cooperation with international scientific accelerator centers was developed in last ten years. Two superconducting magnetic systems of Electron Lens for the Tevatron accelerator (USA) were developed, manufactured and successfully brought into operation. 42 cryogenic electrical feed boxes of various types for Large Hadron Collider (Switzerland) were developed, produced and put into commission. Results of the development of fast-cycling superconducting magnets for the FAIR project (European Research Centre of Ions and Antiprotons, Germany) are discussed. Description of the largest in Russia cryogenic system for cooling with superfluid helium of superconducting RF separator for the new beam channel of the U-70 accelerator (Russia) is presented.
	Slides

THCHZ02	High Power ELV Accelerators for Industries Application	controls, extraction, radiation, target	313
	N. K. Kuksanov, S. Fadeev, Yu. I. Golubenko, D. A. Kogut, A. I. Korchagin, A. Lavrukhin, P. I. Nemytov, R. A. Salimov BINP SB RAS, Novosibirsk
	Beginning from 1971, the Budker Institute of Nuclear Physics Siberian Branch of Russian Academy of Science (SB RAS) started its activity in the development and manufacturing of electron accelerators of the ELV-type for their use in the industrial and research radiation-technological installations. The family of ELV-type accelerators has the energy range from 0.4 to 2.5 MeV with a beam of accelerated electrons of up to 100 mA and maximum power of up to 100 kW for ordinary accelerators and 400 kW power for environmental purpose accelerator. The ELV accelerators are especially popular accelerators not only in Russia, but in China, Korea, and etc. BINP continuously improves design and increases parameters of accelerators. Due to this circumstance and improving of economics after crisis amount of orders for accelerators extremely increased.
	Slides

THCHD01	55 MeV Special Purpose Race-Track Microtron Commissioning	linac, gun, radiation, klystron	316
	A. I. Karev, A. N. Lebedev, V. G. Raevsky LPI, Moscow L. Brothers, L. Wilhide VFCT, Covington, Kentucky A. N. Ermakov, A. N. Kamanin, V. V. Khankin, N. I. Pakhomov, V. I. Shvedunov MSU, Moscow N. P. Sobenin MEPhI, Moscow
	Funding: This work was supported by CRDF Grant #RP0-10732-MO-03 (LLNL) Results of Lebedev Institute 55 MeV special-purpose race-track microtron (RTM) commissioning are presented. RTM is intended for photonuclear detection of hidden explosives based on initiation of photonuclear activation and consequent registration of secondary gamma-rays penetrating possible screening substances. RF system is based on KIU-168 klystron with 6MW/6 kW pulsed/average power operating at 2856 MHz in self-oscillating mode with on-axis coupled standing wave bi-periodic accelerating structure in a feed-back loop. Maximum RF power is now at the level of 2.5 MW. With this RF power energy gain per pass of 5 MeV is provided and up to 10 mA pulsed beam current is obtained at RTM exit. The RTM control system is based on NI modules and LabView software. Beam diagnostic is provided by beam current monitors, by synchrotron radiation and by transition radiation. RTM tuning is achieved by adjustment of: (1) a current in steering coils, (2) an accelerating structure field level, (3) a focal power of solenoidal lens and quadrupole doublet, and (4) injection magnet current.
	Slides

THPSC001	Magnetic Coupled Disk-Loaded Waveguide	impedance, coupling, simulation, insertion	319
	N. P. Sobenin, R. O. Bolgov, D. S. Kamenshikov, S. V. Kutsaev, A. Yu. Smirnov, S. E. Toporkov MEPhI, Moscow
	Funding: Research is supported by Russian President grant MK-3835.2009.2 Electrodynamic simulations results of disk loaded waweguide with magnetic field coupled cells are presentred. Different types of accelerating strructures having positive or negative dispersion were considered. Main electrodynamic parameters - shunt impedance, quality factor, group velocity etc. dependances on operation mode and aperture size are presented and discussed. High order modes issues were studied. These structures are proposed for advanced electron linear accelerators designed using conventional or hybrid schemes. Input coupler matching to this structure is studied.

THPSC010	The Electron Linear Accelerator LUE-200 - Driver the IREN Facility	target, gun, focusing, klystron	346
	V. Kobets, J. Boettcher, A. S. Kayukov, I. N. Meshkov, V. Minashkin, V. G. Pyataev, V. A. Shvets, V. N. Shvetsov, A. P. Sumbaev, V. N. Zamriy JINR, Dubna, Moscow Region P. V. Logachev, V. M. Pavlov BINP SB RAS, Novosibirsk V. Shabratov JINR/VBLHEP, Moscow
	It is reported on startup of the first stage of the Intense REsonance Neutron source installation (IREN) at the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research. The general scheme and current status of the electron linear accelerator with accelerating structure on a S-band traveling wave (f = 2856 MHz) are presented. Results of adjustment of the basic functional systems of the linac and the measured parameters of the beam (pulse current of a beam – 3.0 A, electron energy - 30 MeV; duration of a pulse current - 100 ns; rep. rate - 50 Hz) are reported. The integral neutron yield from nonmultiplying target reaches (3…5)*1010 n/s.

THPSC011	Investigation on the Electron Beam Formation in the Magnetron Gun with a Secondary-Emission Cathode Using the Masgnetic System Based on Permanent Magnets	cathode, gun, permanent-magnet, vacuum	349
	N. G. Reshetnyak, M. I. Ayzatskiy, V. N. Boriskin, I. A. Chertishchev, A. N. Dovbnya, N. A. Dovbnya, V. P. Romas'ko, V. Zakutin NSC/KIPT, Kharkov
	The paper presents the results of investigations on the electron beam formation in the magnetron guns with secondary-emission cathodes using the magnetic system based on annular permanent magnets. The magnetic system, made of NdFeB material, has 10 cm in length, external diameter of 80 mm, internal diameter of 60 mm and longitudinal magnetic field amplitude of 800 Oe. Experiments were carried out using the magnetron guns having cathodes with diameters from 6mm to 16 mm, 75 mm in length, and an anode of 56 mm in diameter. The cathode voltage was 15…25 kV. The experimental results have demonstrated that the magnetron guns with cathodes having 6mm, 10mm and 16 mm in diameter can form tubular electron beams. Under the cathode voltage of 18 kV the electron beam current is ~3.5…5 А. The beam current dependence on the voltage obeys to the "3/2" law. As the cathode voltage was increased to 22 kV, the beam current bunch generation and anode current of ~1.0 mks were observed. As a result of investigations a compact magnetron gun with a secondary-emission cathode and a magnetic system on the base of annular permanent magnets was constructed.

THPSC018	Power Source for High Voltage Column of Injector to Proton Synchrotron with Output Power up to 5kW	controls, synchrotron, resonance, proton	360
	D. V. Senkov, Yu. I. Golubenko, A. S. Medvedko, P. I. Nemytov, D. N. Pureskin BINP SB RAS, Novosibirsk
	The presented report contains the description of power source with 400Hz output voltage of sinusoidal shape with amplitude up to 300V and output power up to 5kW, operating on the primary coil of high voltage transformer of precision 1.5MV high voltage source for proton synchrotron injector. The source consists of the converter with IGBT switches , working with a principle of pulse-width modulation on programmed from 15 to 25 kHz frequency, modulated with amplitude and frequency regulated sinusoidal 400Hz signal, transformer and the synchronous rectifier with IGBT switches, controlled synchronous with converter. The efficiency of system is more than 80% at the nominal output power 5kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.

THPSC022	Development and Application of Electron Linac Electromagnetic Devices for Radiotechnologies	linac, controls, pick-up, target	369
	V. A. Shendrik, A. N. Dovbnya, A. E. Tolstoy NSC/KIPT, Kharkov
	The creation and subsequent service of modern electron linear accelerators at the NSC KIPT have brought evidence for possible successful introduction of radiotechnology processes using electron irradiation. A further extension and complication of physical problems solvable on the basis of radiotechnologies have put forward new and increased requirements for the systems of beam scanning, extraction and formation on the targets and extended irradiated objects. The results of applying our methods developed for prompt measurement of the kinetic energy of the scanned electron beam are presented. For measurement and continuous control of the electron energy the hodoscope magnetic spectrometer technique has been used. The spectrometer includes only one deflecting magnet and has no magnetic focusing. If the real field topography in the magnet is known in detail, then using the input and output coordinates of deflected particles it is possible to determine their energy, and also the chromaticity of electron beam. The step-pulse scanning of the beam is realized through the use of an air-core short-pulse electromagnet. Development and tests of separate units of the device are under way

THPSC029	UEL-10-D New Linear Electron Accelerator for Non-Destructive Testing	target, controls, focusing, power-supply	382
	I. Yu. Vakhrushin, V. Alexeev, L. Z. Kavalerchik, A. P. Klinov, A. S. Krestianinov, K. N. Maslov, Yu. P. Shchepin, M. F. Vorogushin NIIEFA, St. Petersburg
	A compact accelerator UEL-10-D for radiographic inspection of steel products up to 500mm thick has been designed and manufactured. The accelerator provides the 10 MeV energy and the photon dose rate 1m from target of 30Gy/min. The accelerator consists of an irradiator mounted on a yoke, heat-exchanger and industrial panel computer. The equipment of the accelerator is mostly located inside the irradiator including the HV power supply system, magnetron modulator and control system blocks. Using this yoke, the irradiator is installed on a bridge crane, which ensures its high manoerability necessary to test products of complicated geometry. Size of the irradiator without yoke is 2040950950 mm. In 2010, the accelerator was put into operation at the "Izhorskie Zavody", St. Petersburg. The UEL-10-D accelerator can be also used in radioscopic or tomographic systems.

THPSC031	The Use of the Electron Beam from the Magnetron Gun-Based Accelerator for Zirconium Surface Modification	cathode, gun, target, vacuum	384
	V. Zakutin, A. N. Aksyonova, A. N. Dovbnya, S. D. Lavrinenko, V. N. Pelykh, N. N. Pilipenko, N. G. Reshetnyak NSC/KIPT, Kharkov
	The paper presents the results of investigations on the zirconium specimen surface after irradiation them with an electron beam from the accelerator. The operating conditions were the following: electron energy from 7 to 80 keV, pulse duration of 15 μs, pulse frequency of 2 Hz. for two modes of the energy density on the samples, namely, 10 J/сm2 and 20 J/сm2. The experiments have demonstrated that the irradiation leads to the noticeable smoothing of the specimen surface roughness, the surface becomes smoother and unruffled. The results of investigations on the microhardness of irradiated and unirradiated areas of the zirconium specimen surface areas show that the microhardness value has been increased by ~20% of the initial value (1920 MPa) for the irradiation energy density of 10 J/cm² and by ~35% for 20 J/cm², that can be related with a different quantity of an transferred energy of the irradiated surface. By choosing the optimum electron irradiation characteristics this technique may be recommended for hardening and modification of the near-surface layer of zirconium materials applied in the nuclear-power engineering.

FRCHA02	ELLUS-6M Linear Electron Accelerator for Radiotherapy	radiation, controls, target, monitoring	405
	V. A. Shishov, A. A. Budtov, M. F. Vorogushin NIIEFA, St. Petersburg
	A compact medical accelerator of new generation "ELLUS-6M" has been designed and manufactured for radiotherapy by 6MeV photons in the multi-static and arc modes. The gantry can be rotated through ±1850 and ensures setting accuracies of the irradiator rotation velocity and positioning sufficient for the IMRT mode. The computerized control system is compatible with the treatment planning system and allows upgrading by adding new modules. To realize the conformal radiotherapy, the following additional medical equipment has been developed: a multi-leaf collimator a portal vision system for the dose field verification during irradiation and an upgraded treatment table made as a semi-pantograph. In 2010, it is planned to finish clinical tests of the "ELLUS-6M" accelerator with the additional medical equipment in the N. N. Petrov Scientific Research Oncology Institute, Pesochny, St. Petersburg.
	Slides

FRCHB03	Status of ILU-14 Electron Accelerator	coupling, cathode, focusing, feedback	411
	V. S. Podobaev, V. V. Bezuglov, A. A. Bryazgin, K. N. Chernov, V. G. Cheskidov, B. L. Faktorovich, V. A. Gorbunov, I. V. Gornakov, A. V. Ivanov, E. N. Kokin, M. V. Korobeynikov, A. N. Lukin, I. Makarov, N. V. Matyash, S. A. Maximov, G. N. Ostreiko, A. D. Panfilov, V. M. Radchenko, N. D. Romashko, G. V. Serdobintsev, A. V. Sidorov, V. V. Tarnetsky, M. A. Tiunov, V. O. Tkachenko BINP SB RAS, Novosibirsk
	A new high power (up to 100 kW) industrial linear electron accelerator ILU-14 for energy of 7.5–10 MeV is under construction at Budker INP. The accelerator operates at 176 MHz with total efficiency of 26 %, its modular structure allows the electron energy and beam current to be varied within certain limits by changing the modular arrangement. The 5 MeV prototype of the accelerator was created and successfully tested in 2009. The designed average beam current of 600 mA with pulsed power of 2.5 MW and accelerating structure electron efficiency of 68 % were obtained during experiments. Applying an additional RF voltage to the electron gun cathode-grid gap allowed a beam current passing of 96 % with minor beam energy spread. The paper presents results of the numerical and experimental study of the accelerator systems together with the latest tests on the accelerator prototype.
	Slides