RuPAC-2010 - List of Keywords (injection)

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injection

Paper	Title	Other Keywords	Page
TUCHZ02	Maintenance of ITEP-TWAC Facility Operation and Machine Capabilities Development	ion, acceleration, laser, proton	32
	N. N. Alexeev, P. N. Alekseev, A. Balabaev, V. I. Nikolaev, Yu. A. Satov, V. A. Schegolev, B. Y. Sharkov, A. Shumshurov, V. P. Zavodov ITEP, Moscow
	Funding: This work is supported by ROSATOM The ITEP-TWAC facility operation with proton and heavy ion beams for ~4000 hours per year in several modes of beam acceleration and accumulation is determined by present-day demands of different beam users in the frame of current machine resources. Displacement of state interests from fundamental research to strictly-practical tasks stimulates multimode operation of accelerators with trend of beam using for applications. Mastering of Ag¹⁹⁺ ions acceleration in the UK ring up to the energy of 100 MeV/u and Fe²⁶⁺ beam stacking in the U-10 ring at the energy of >200 MeV/u in addition to routine operation with C⁶⁺ beam at energy of 200-400 MeV/u with fast and slow extraction of circulating beam clear the way to beam using for a lot of applications requiring extension of the facility experimental area. Development of laser ion source technology takes aim at high current and high charge state ions generation for elements with A ~60 to be effectively stacked in the U-10 ring with multiple charge exchange injection technique. The machine maintenance efforts and current activities aiming at both subsequent improvement of beam parameters and extending of beam applications are presented
	Slides

TUPSA014	Design of the Nuclotron Booster in the NICA Project	ion, booster, electron, 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.

TUPSA017	Project of JINR Superconducting Synchrotron for Hadron Therapy	synchrotron, ion, dipole, emittance	77
	E. Syresin, N. N. Agapov, A. V. Eliseev, G. G. Hodshibagijan, V. Karpinsky, A. D. Kovalenko, I. N. Meshkov, V. A. Mikhailov, A. G. Olshevsky, G. Shirkov, S. G. Shirkov, G. V. Trubnikov, A. Tuzikov JINR, Dubna, Moscow Region
	The project of medical carbon synchrotron at maximal ion energy of 400 MeV/n was developed in JINR. The project goal is accumulation of the superconducting technology at construction of the carbon synchrotron with a circumference of 65 m on basis of Nuclotron type magnet elements. For injection of the carbon ions it is proposed to use IH linac of C⁴⁺ at energy 4 MeV/n. Superconducting gantry at a weight of 150 t is developed for patient treatment.

TUPSA029	Pickup Beam Measurement System at the VEPP-2000 Collider	collider, betatron, controls, pick-up	101
	Yu. A. Rogovsky, E. A. Bekhtenev BINP SB RAS, Novosibirsk
	This paper reviews the present state of electromagnetic beam position monitors (pickups) at VEPP-2000 collider. It includes descriptions of position monitors, typical interfaces for these monitors and their system characteristics (resolution, stability, bandwidth and problems or limitations) are discussed. The paper also reviews several types of diagnostic measurements using beam position monitors which are useful in improving accelerator operations.

TUPSA033	Transition Radiation Detector which Used Dihedral Angle as Radiator	radiation, pick-up, scattering	113
	A. V. Serov, A. V. Koltsov LPI, Moscow
	The specific features of transition radiation in a dihedral angle are considered. It is shown that the dependence of the angular distributions of radiation intensity in a dihedral angle on the energy and the direction of motion of particles are stronger than a similar dependence in the case of transition radiation on a plane interface. This fact enhances the applicability of transition radiation to measure parameters of charged particles.

WECHY02	Kurchatov Synchrotron Radiation Source Facilities Modernization	electron, wiggler, storage-ring, controls	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

WECHZ04	Results of Electron Cooling Beam Studies at COSY	electron, proton, 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, electron, 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

WEPSB021	RF Cavities HOM Longitudinal Instabilities at SR Source Siberia-2 in KCSR	storage-ring, synchrotron, electron, 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.

WEPSB024	An Increasing of Electron Beam Lifetime at Injection Energy in SIBERIA-2 Storage Ring by Regulating of Betatron Coupling	coupling, betatron, electron, 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.

WEPSB025	Center Region Design of the Superconducting Cyclotron C400	cyclotron, simulation, ion, focusing	221
	G. A. Karamysheva, N. A. Morozov, E. Samsonov JINR, Dubna, Moscow Region M. Abs, Y. Jongen, W. J.G. M. Kleeven, S. Zaremba IBA, Louvain-la-Neuve O. Karamyshev JINR/DLNP, Dubna, Moscow region
	Compact superconducting isochronous cyclotron C400 has been designed at IBA (Belgium) in collaboration with the JINR (Dubna). This cyclotron will be used for radiotherapy with proton, helium or carbon ions. The ions extracted from the source and transported with the axial line are bent into the median plane of the cyclotron by a spiral inflector. The optimal design of the inflector and cyclotron center for acceleration of the ion beams in the 4th RF harmonic mode was investigated. A computer model of the dee geometry with the inflector and inflector housing was created. The 3D magnetic field map and 3D electric field map were used for beam dynamics simulations. Comparison between field map created in electrostatic simulation and field map from RF simulation is given. Results of the beam tracking are presented.

WEPSB035	Logging Actions of Operators in the IHEP U-70 Accelerator Complex Control System	controls	248
	V. P. Voevodin IHEP Protvino, Protvino, Moscow Region
	The control system (CS) of the U-70 accelerator complex supports distributed control rooms environment which are equipped by unified consoles. Using any console it is possible to request any action on any accelerator complex equipment in accordance with user’s rights to access it. There are situations requiring knowledge of actions, was performed on some peace of equipment during defined time slot. To solve this problem the CS logs all operators’ actions initialized from any consoles such as open/close session, change settings of accelerator parameters, restore settings from archives. The paper describes a logging software organization and functionalities, contents of the log files and information visualization tools.

WEPSB037	Specific Features of Automatic Control Systems for Applied Cyclotrons	cyclotron, controls, vacuum, ion	254
	A. P. Strokach, V. P. Bagrievich, A. N. Kuzhlev NIIEFA, St. Petersburg
	A distributed automatic control system for the MCC-30-15 compact medical cyclotron has been built on the hierarchy principle. The lower hierarchical level consists of controllers for various systems of the cyclotron, which are networked on the basis of Profibus. An industrial Advantech-type computer has been chosen as the host computer of the system. The upper hierarchical level also contains computers to control the RF system of the cyclotron and operator workstation. Computers of the upper hierarchical level are networked on the basis of Ethernet. The number of computers for the operator workstation is limited only by the Ethernet bandwidth and the speed of the host computer. To measure the beam current, a multi-channel high-precision measuring current amplifier has been developed, signals from which are sent to a high-speed ADC. It is possible to view current pulse oscillograms, which makes much more easy the adjustment of the cyclotron modes.

THCHX01	Beam Tests of the LHC Transverse Feedback System	feedback, kicker, pick-up, damping	275
	V. Zhabitsky JINR, Dubna, Moscow Region W. Höfle, G. Kotzian, E. Montesinos, M. Schokker, D. Valuch CERN, Geneva
	A powerful transverse feedback system ("LHC Damper") has been installed in LHC in order to stabilise the high intensity beams against coupled bunch transverse instabilities in a frequency range from 3 kHz to 20 MHz and at the same time to damp injection oscillations originating from steering errors and injection kicker ripple. The LHC Damper has been also used for exciting transverse oscillations for the purposes of abort gap cleaning and tune measurement. The LHC Damper includes 4 feedback systems on 2 circulating beams (in other words one feedback system per beam and plane). Every feedback system consists of 4 electrostatic kickers, 4 push-pull wide band power amplifiers, 8 preamplifiers, two digital processing units and 2 beam position monitors with low-level electronics. The power and low-level subsystem layout is described along with first results from the beam commissioning of 16 power amplifiers and 16 electrostatic kickers located in the LHC tunnel. Results of beam tests of the power and low-level subsystems are summarized.
	Slides

THCHA03	A Beam Loss Scintillator System for Background Monitoring at the LHCb Experiment	background, simulation, beam-losses, monitoring	286
	V. Talanov, R. Dzhelyadin IHEP Protvino, Protvino, Moscow Region F. Alessio, G. Corti, R. Jacobsson CERN, Geneva A. Bobrov, A. Bondar BINP, Novosibirsk M. H. Lieng UNIDO, Dortmund
	The LHCb experiment at the Large Hadron Collider (CERN) has developed a complete high-speed and high-sensitivity background monitor based on a pair of plastic scintillators and a custom-made LHCb readout board to record fast LHC beam losses with time information. The system is installed close to the LHCb Vertex Locator and it has been operational since the LHC pilot run providing valuable information to the LHC Operations crew during beam commissioning and to LHCb Control Room about the experimental conditions at the physics runs. The system is able to record fast beam losses at a rate of 40 MHz, providing information regarding the bunch crossing of the loss, the intensity of the loss calibrated in number of Minimum Ionizing Particles. A full control and monitoring system has been developed as well within the framework of the LHCb Experimental Control System. A complete simulation of the system has been central in converting the response of the system into physical quantities. In this paper we will describe the system in its components and functionalities, the commissioning phase, the simulation framework and the first results with real beam at the LHC.
	Slides

THPSC007	Study of Electrodynamic and Thermodynamic Mechanisms Influencing Stability of Superconducting Rutherford Cable	quadrupole, simulation, synchrotron, superconducting-magnet	337
	V. Zubko, I. Bogdanov, S. Kozub, P. A. Shcherbakov, L. S. Shirshov, L. Tkachenko IHEP Protvino, Protvino, Moscow Region
	Stability for superconducting fast-cycling dipoles and quadrupoles plays an important role. A feature of a complex network of strands and strand-to-strand contacts, current distribution in the network have to be taken into account for superconducting cables. The coupled numerical simulation of electromagnetic and thermal processes in Rutherford superconducting cables during the initiation of a quench was carried out. The network model has been combined with thermal analysis, which allows one to model quench dynamics, including the effects of a current redistribution in strands, discontinuities and inhomogeneity, the initial heating in strand, and, as a result, occasional quench recovery or runaway quench propagations. A computer simulation has been made for study of dependence of the minimum quench energy on ratio operating/critical currents for cables with and without core.

THPSC020	Compact Cyclotron as a Proton Source for the Detection of Explosives Based on Nuclear Resonance Absorption in Nitrogen	cyclotron, storage-ring, emittance, ion	363
	L. M. Onischenko, S. B. Vorozhtsov JINR/DLNP, Dubna, Moscow region Yu. G. Alenitsky, A. A. Glazov, E. E. Perepelkin, A. S. Vorozhtsov JINR, Dubna, Moscow Region J. T. Kwan, R. E. Morgado, T.-S. F. Wang LANL, Los Alamos, New Mexico
	In the proposed operational implementation of the Nuclear Resonance Absorption (NRA) method for explosives detection, the inspected object is scanned by a beam of 9.17 MeV gamma rays of a precise energy to determine the fraction of the beam resonantly absorbed in the nitrogen nuclei of the explosive. The 9.17 MeV gamma rays are most readily generated in the inverse reaction, in which a 1.747 MeV proton is resonantly captured by C13, followed by the emission of gamma rays from the recoiling N14 nucleus. To achieve the stringent requirements of a 1.747 MeV proton beam with an intensity of several milliampere and with as small as possible energy spread and angular divergence , a compact isochronous cyclotron with internal H-minus ion source and current of ~2mA was considered as a stand-alone source or as an injector (with a current of ~200 microA) into a storage ring.