RuPAC-2010 - List of Keywords (emittance)

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

emittance

Paper	Title	Other Keywords	Page
TUCHX03	Crab Waist Approach: from DAΦNE to SuperB	luminosity, sextupole, factory, collider	6
	M. Zobov INFN/LNF, Frascati (Roma)
	The crab waist collision scheme (CW) was proposed and successfully tested at the Phi-factory DAΦNE. At present this scheme is considered to be most attractive for the next generation lepton factories. In particular, the novel scheme is a key element of the SuperB project, a new SuperB-factory with a luminosity about two orders of magnitude higher than that achieved at the present B-factories (KEKB and PEPII). In this paper we summarize the results achieved at DAΦNE after implementation of the CW collision scheme and discuss the status of the SuperB project.
	Slides

TUCHB03	Optics Design for NICA Collider	collider, optics, lattice, proton	17
	S. A. Kostromin, O. S. Kozlov, I. N. Meshkov, V. A. Mikhaylov, A. O. Sidorin JINR, Dubna, Moscow Region A. Bolshakov, P. Zenkevich ITEP, Moscow V. A. Lebedev, S. Nagaitsev Fermilab, Batavia Y. Senichev FZJ, Jülich
	The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR collider experiments with ions at maximum energy (center of mass) SNN(1/2) ~ 11GeV/u. Collider ring has to provide ion-ion and ion-proton collisions in energy range 1-4.5 GeV/u and collisions of polarized proton-proton and deuteron-deuteron beams. Collider conceptions with constant gammatr and with possibility of its variation are considered. In the ring with changeable gammatr the optics design should allow to work with gammatr ~40 for protons mode as well as with γtr in range 3-11 for ions mode. The NICA has the racetrack shape (circumference ~450m) with two arcs and two straight sections which optimized to have betta*~35cm in two IPs. Duality of optics adjustable for different energy and different particles puts the special requirements on the arc and straight sections. Suppressing of rather high normalized chromaticity with changeable tune compels us to use the multi-family sextupole scheme. Three variants of the ring optics (based on FODO-cells, ODFDO-cells) were tested to provide acceptable IBS-time. Final version of the lattice is under discussion.
	Slides

TUCHY01	Muon Collider Design Status	collider, proton, acceleration, target	20
	Y. Alexahin Fermilab, Batavia
	Muon Collider (MC) - proposed by G. I. Budker and A. N. Skrinsky almost half a century ago - is now considered as the most exciting option for the energy frontier machine in the post-LHC era. A national Muon Accelerator Program (MAP) is being formed in the USA with the ultimate goal of building a MC at the Fermilab site with c.o.m. energy in the range 1.5-3 TeV and luminosity of ~1-5*10³⁴ cm^-2s-1. As the first step on the way to MC it envisages construction of a Neutrino Factory (NF) for high-precision neutrino experiments. The baseline scheme of the NF-MC complex is presented and possible options for its main components are discussed.
	Slides

TUPSA011	Hollow Photocathode Concept for E-gun	laser, cathode, electron, 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.

TUPSA017	Project of JINR Superconducting Synchrotron for Hadron Therapy	injection, synchrotron, ion, dipole	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.

WECHB01	Radiation Sources at Siberia-2 Storage Ring	radiation, electron, 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

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

WEPSB004	Self-stimulated Undulator Radiation Sources	undulator, electron, radiation, storage-ring	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 .

WEPSB012	Method to Estimate the Beam and Structure Parameters for the Dispersion Accelerator Parts	linac, quadrupole, coupling, lattice	193
	V. A. Moiseev RAS/INR, Moscow
	The beam dynamics parameters as the transverse emittance information, momentum spread and structure characteristics are determined by treatment of the small number of profile measurements for the dispersion accelerator parts. The reliability of measurements is estimated.

WEPSB013	Reconstruction of the Beam Parameters and Structure Characteristics for INR Isotope Channel	linac, target, proton, quadrupole	196
	V. A. Moiseev, S. Bragin, A. Feschenko, O. V. Grekhov, Yu. V. Kiselev, A. N. Mirzojan, O. Volodkevich RAS/INR, Moscow
	The various treatments of profile measurements have been applied to estimate both the major beam parameters and structure functions for the INR isotope channel. The main problem for beam dynamics reconstruction consists in the presence of the dispersion function along the beam line studied. The reliable results were obtained and used to form the beam on the target of INR isotope complex.

WEPSB015	Simulation of Carbon Ion Extraction and Low Energy Beam Transport System for RFQ at the Linac I-100	ion, rfq, extraction, plasma	201
	B. A. Frolov IHEP Protvino, Protvino, Moscow Region
	For the carbon ion injection into the radio frequency quadrupole, a laser ion source and a low energy beam transport system (LEBT) has to deliver 20 mA C+5 ion beam with 80 keV at the entrance of RFQ within normalized emittance of 0.4Pi mm mrad. An extraction system and a low energy transport line should be optimized to reduce the beam emittance as far as possible. The results of computer simulation are presented for extraction and LEBT systems: combinations of a tetrode extraction system and an electrostatic focusing lens consisting of three electrodes with negative voltage of a middle grid electrode.

WEPSB017	Space Charge Simulation Using MADX with Account of Synchrotron Oscillations	lattice, simulation, space-charge, extraction	204
	V. V. Kapin MEPhI, Moscow Y. Alexahin Fermilab, Batavia
	Direct space charge forces can be simulated with the 6D beam dynamics code MADX using a number of 4D BEAMBEAM elements with Gaussian transverse profile for charge density. To take into account effects of synchrotron oscillations on space charge forces, the amplitude of BEAMBEAM elements is modulated according to the distance between a particle and the bunch center assuming Gaussian longitudinal profile. Parameters of every BEAMBEAM element (charge and sizes) are defined by local values of beta-function and dispersion, while they are updated according to the beam intensity and beam emittances at every turn. MADX script accomplishing this method has been written for the lattice of the existing Debuncher ring. The slow extraction at the 3rd order resonance with simultaneously varying the horizontal tune and the sextupole strength is considered as one of the options for Debuncher to be used in the "mu2e" project. Our MADX simulation results are compared with results obtained by V. Nagaslaev (FNAL) using the particle-in-cell ORBIT-code. The evolutions of the phase-spaces and the beam intensity within ten thousands turns have shown a good agreement between the MADX and ORBIT results.

WEPSB028	Booster Electron Cooling System of NICA Project	electron, ion, booster, 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.

THCHB01	Study of INR RAS Linac Pulsed Duoplasmatron	ion, plasma, extraction, ion-source	289
	A. Belov, O. T. Frolov, E. S. Nikulin, V. P. Yakushev RAS/INR, Moscow V. Zubets BNL, Upton, Long Island, New York
	Results of numerical simulation and experimental study of hydrogen ion beam from a pulsed duoplasmatron with different plasma expansion cap geometry are given. Intensive beam current oscillations with frequency of ~1MHz and up to 70% modulation level (for ion current ~ 100 mA) with plasma expansion cap of different shape were observed. It has been found by direct measurements that these oscillations are formed during plasma transport through the expansion cap. Noiseless mode of operation for the pulsed duoplasmatron has been obtained with the plasma expansion cap of new design. Results of the 400keV hydrogen ion beam current and emittance measurements are presented.

THPSC004	Input Couplers for the Dipole Mode Periodic Structures	coupling, simulation, dipole, resonance	328
	M. V. Lalayan, A. Anisimov, S. V. Kutsaev, A. Yu. Smirnov, N. P. Sobenin MEPhI, Moscow V. V. Paramonov RAS/INR, Moscow A. A. Zavadtsev, D. A. Zavadtsev Nano, Moscow
	Funding: Research is supported by Federal Education agency grant P1141 27.08.2009 and by FCP "Scientific and scientific-educational stuff of innovative Russia" grant. Three variants of the input coupler for the periodic deflecting structure operating at hybrid dipole TM11 mode, with the phase velocity equal to the light velocity are considered: non-symmetric design and two symmetric designs with auxiliary rectangular waveguide and shorting plates in it and with auxiliary cut-off rectangular waveguide. The reflection depending on the coupling window width and on the coupling cell diameter was been investigated for all coupler designs. The reflection coefficient has been calculated in the whole dipole mode passband. The field asymmetry in the beam area has been considered. The eigen frequency of the coupling cell has been calculated.

THPSC020	Compact Cyclotron as a Proton Source for the Detection of Explosives Based on Nuclear Resonance Absorption in Nitrogen	cyclotron, injection, storage-ring, 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.

FRCHA03	MCC-30/15 Cyclotron - Parameters, Adjusting Works and their Results	cyclotron, ion, acceleration, extraction	408
	A. P. Strokach, P. V. Bogdanov, A. V. Galchuck, V. G. Mudrolubov, M. F. Vorogushin NIIEFA, St. Petersburg
	Medical Compact Cyclotron MCC-30/15 is intended for acceleration of hydrogen and deuterium negative ions in the energy control range. The Cyclotron was designed in the frame of the Contract on delivering of the Cyclotron MCC-30/15 equipment to the Accelerator Laboratory of Jyvaskyla University, Finland. The Cyclotron is built up on the base of the electromagnet of the shielded type with the pole diameter of 140 cm. The Cyclotron is equipped with the external negative hydrogen and deuterium ions injection system. The particle acceleration is performed on fixed frequency (second and fourth harmonics). The beam current of 30-18 MeV protons and 15-9 MeV deuterons extracted into two beam lines is equal to more than 100 mkA and 50 mkA, accordingly. The Cyclotron equipment was delivered to the Buyer, the commissioning work was finished on April 30, 2010.
	Slides