COOL'11 - List of Keywords (ion)

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

ion

Paper	Title	Other Keywords	Page
MOIO01	Electron Cooling Performance at IMP Facility	electron, accumulation, storage-ring, acceleration	1
	X. D. Yang, W. P. Chai, H. Jia, G. H. Li, J. Li, P. Li, X. M. Ma, L. J. Mao, R. S. Mao, M. T. Song, T. L. Yan, J. C. Yang, D. Y. Yin, Y. J. Yuan, W. Zhang, X. H. Zhang, T. C. Zhao, W. H. zheng IMP, Lanzhou
	The ion beam of 58Ni¹⁹⁺ with the energy of 6.39MeV/u was accumulated in the main ring of HIRFL-CSR with the help of electron cooling. The related angle between ion and electron beams in the horizontal and vertical planes was intentionally created by the steering coils in the cooling section after maximized the accumulated ion beam in the ring; the radial electron intensity distribution was changed by the ratio of potentials of grid electrode and anode of the electron gun, the different electron beam profiles were formed from solid to hollow in the experiments. In these conditions, the maximum accumulated ion beam intensity in the 10 seconds was measured, the lifetime of ion beam was measured, the momentum spread of the ion beam varying with particle number was measured during the ion beam decay, the power coefficient was derived from these data, in additional, the momentum spread in the case of constant particle number was plotted with the angle and electron beam profile. The oscillation and shift of the central frequency of the ion beam were observed during the experiments. The upgrade and improvement in the CSRm cooler and the progress in the CSRe cooler were presented. These results were useful to attempt the crystal beam forming investigation in the CSR.
	Slides

MOIO02	NICA Project at JINR	luminosity, collider, proton, emittance	6
	I. N. Meshkov JINR, Dubna, Moscow Region
	Status of the project of Nuclotron-based Ion Collider fAcility NICA/MPD (MultiPurpose Detector) under development at JINR (Dubna) is presented. The general goals of the project are providing of colliding beams for experimental studies of both hot and dense strongly interacting baryonic matter and search for the mixed phase and critical endpoint. Spin physics experimental studies in collisions of polarized protons (deuterons) are planned as the second stage of the project. The first program requires providing of heavy ion collisions in the energy range of squrt(s) = 4-11 GeV at average luminosity of L = 1·10²⁷ cm^-2 s-1 for Au⁷⁹⁺. The polarized beams mode is proposed to be used in energy range of squart(s) = 12-27 GeV (protons) at luminosity of L = 1·10³⁰ cm^-2 s-1. The key issue of the project is application of both stochastic and electron cooling methods at the NICA collider. The latter will be used in the NICA Booster for preliminary formation of the ion beam. The report contains description of the facility scheme and characteristics in heavy ion operation mode, the discussion of luminosity life time limitations, status and plans of the project development.
	Slides

MOIO03	Current Plans for Beam Cooling at FAIR	antiproton, storage-ring, accumulation, secondary-beams	10
	M. Steck GSI, Darmstadt
	For the efficient production of secondary beams in the new FAIR accelerator complex beam cooling is a technique of outstanding importance. In the first stage of the FAIR project, the Modularized Start Version, stochastic cooling will be employed in the pre-cooling and accumulation of antiprotons. In a later stage the stochastic pre-cooling will also be applied to rare isotope beams. Further upgrades will be the installation of a dedicated antiproton accumulator ring and the use of electron cooling to provide ion beams, both stable ions and rare isotopes, for experiments with stored ions of highest phase space density. An overview of the current activities in beam cooling will be given.
	Slides

MOIO06	Recent Status of Beam Cooling at S-LSR	laser, electron, proton, synchrotron	19
	A. Noda, M. Nakao, H. Souda, H. Tongu Kyoto ICR, Uji, Kyoto T. Fujimoto, S. I. Iwata, S. Shibuya AEC, Chiba M. Grieser MPI-K, Heidelberg I. N. Meshkov, A. V. Smirnov, E. Syresin JINR, Dubna, Moscow Region K. Noda, T. Shirai NIRS, Chiba-shi H. Okamoto HU/AdSM, Higashi-Hiroshima
	At S-LSR in ICR, Kyoto University, approaches to multi-dimensional laser cooling of Mg ions with the use of synchro-betatron coupling has been applied in addition to the realization of one dimensional ordering of 7 MeV proton beam with application of an electron beam cooling. In the present paper, recent results of transverse cooling of bunched beam will be presented together with an aproach to provide a short bunch 7 MeV proton beam with a high peak current to make bio-medical irradiation of biological cells.
	Slides

MOIO07	Application of Cooling Methods to NICA Project	electron, collider, luminosity, emittance	25
	G. V. Trubnikov JINR, Dubna, Moscow Region
	Application of cooling methods a NICA project
	Slides

THIOA01	Ultimate Performance of Relativistic Electron Cooling at Fermilab	electron, antiproton, focusing, emittance	31
	A. V. Shemyakin, L. R. Prost Fermilab, Batavia
	The Fermilab’s Recycler ring employs a 4.3 MeV, 0.1 A DC electron beam to cool antiprotons for accumulation and preparation of bunches for the Tevatron collider. The most important features that distinguish the Recycler cooler from other existing electron coolers are its relativistic energy, a low value of the longitudinal magnetic field in the cooling section, ~100 G, and the lumped focusing in the electron beam lines. The report will summarize the experience of designing, commissioning, and optimizing the performance of this unique machine.
	Slides

THIOA02	The First Commission Results of the High Voltage Magnetized Cooler for COSY	electron, gun, pick-up, power-supply	37
	V. B. Reva, N. Alinovsky, A. M. Batrakov, T. V. Bedareva, E. A. Bekhtenev, O. V. Belikov, V. N. Bocharov, V. V. Borodich, M. I. Bryzgunov, A. V. Bubley, V. A. Chekavinskiy, V. G. Cheskidov, B. A. Dovzhenko, A. Erokhin, G. A. Fatkin, M. G. Fedotov, A. D. Goncharov, K. Gorchakov, V. K. Gosteev, I. A. Gusev, A. V. Ivanov, G. V. Karpov, Y. I. Koisin, M. N. Kondaurov, A. Kryuchkov, A. D. Lisitsyn, I. A. Lopatkin, V. R. Mamkin, A. S. Medvedko, V. M. Panasyuk, V. V. Parkhomchuk, I. V. Poletaev, V. A. Polukhin, A. Yu. Protopopov, D. N. Pureskin, A. A. Putmakov, E. P. Semenov, D. V. Senkov, D. N. Skorobogatov, N. P. Zapiatkin BINP SB RAS, Novosibirsk
	The electron cooler of a 2 MeV for COSY storage ring FZJ is assembling in BINP. The cooler is designed on the classic scheme of low energy coolers like cooler CSRm, CSRe, LEIR that was produced in BINP before. The electron beam is transported inside the longitudinal magnetic field along whole trajectory from an electron gun to a collector. This optic scheme is stimulated by the wide range of the working energies 0.1(0.025)- 2 MeV. The electrostatic accelerator consists of 34 individual unify section. Each section contains two HV power supply (plus/minus 30 kV) and power supply of the magnetic coils. The electrical power to each section is provided by the cascade transformer. The cascade transformer is the set of the transformer connected in series with isolating winding. This paper describes the status of the electron cooling assembling.
	Slides

THIOA03	The Advance Technology Extraction for Therapy Ions Beam from Carbon Storage Ring with Electron Cooling	extraction, electron, septum, storage-ring	43
	V. V. Parkhomchuk, V. B. Reva BINP SB RAS, Novosibirsk
	The using of the electron cooling technology for the carbon storage ring are discussed. Results of the carbon beam cooling in the CSRe used as base for calculation the limits on the carbon beam parameters.
	Slides

THCOB01	Radiactive Recombination of Heavy Bare Nuclei and Ions in Electron Cooling System	electron, collider, booster, heavy-ion	48
	A. V. Philippov, A. B. Kuznetsov JINR/VBLHEP, Dubna, Moscow region I. N. Meshkov JINR/DLNP, Dubna, Moscow region
	An attempt to present a comprehensive overview of experimental data of radiative recombination (RR) rate of nuclei (from protons to uranium) and various intermediate charge states of ions in electron coolers is presented at the report. A comparison of the experimental data for bare nuclei with theoretical models of H. Kramers, M. Bell and J. S. Bell, R. Schuch has been performed. It is shown that the RR rate of bare nucleus depends on the electron energy shift relatively (in the center of mass system) to optimal electron energy as dE−3/8 (in energy range dE > 1 meV) that is significantly different from the theoretical approaches, including averaging over the transverse electron temperature. Also it is shown that the RR rate of bare nucleus depends on transverse temperature as Ttr. Analysis of the experimental data for cooled heavy ions shows that the rates of the process critically depends on their charge state (electron configuration of ion shells) and for some charge states essentially increases having a resonant character. The estimations of RR rate losses of the Au³²⁺, Au³³⁺, Au⁴³⁺, Au⁵¹⁺, Au⁶¹⁺, Au⁶⁸⁺ and Au⁶⁹⁺ ions beam due to RR process in the electron cooler of the Booster is presented. The bare nuclei Au⁷⁹⁺ lifetime limitation due to RR process in the electron cooler of the Collider NICA is analyzed and measures of its increasing are considered.
	Slides

TUIOB01	Numerical Investigation of Stochastic Cooling at NICA Collider	collider, accumulation, electron, emittance	52
	T. Katayama GSI, Darmstadt I. N. Meshkov, G. V. Trubnikov JINR, Dubna, Moscow Region
	At the heavy ion collider NICA promoted at the Dubna, JINR, the stochastic cooling will play the crucial roles to manipulate the beam. The primary goal is to prevent the IBS diffusion effects to keep the high luminosity during the experimental cycle. The other main purpose is to accumulate the beam intensity up to several times 1·10¹⁰ from the injector NUCLOTRON with use of barrier bucket method. With this method, the short bunch formation is not necessary in the injector NUCLOTRON, and is transferred to the collider as a long bunch condition. After the BB accumulation the coasting beam is adiabatically bunched with the help of RF field and the stochastic cooling. In the present paper the detailed simulation results are presented for the above three process (mainly longitudinal freedom) .
	Slides

WECOA01	Ion Kinetics in the Ultra-low Energy Electrostatic Storage Ring (USR)	target, electron, storage-ring, antiproton	89
	A. I. Papash MPI-K, Heidelberg A. V. Smirnov JINR, Dubna, Moscow Region C. P. Welsch The University of Liverpool, Liverpool
	The Ultra-low energy Storage Ring (USR) at the Facility for Low-energy Antiproton and Ion Research (FLAIR) will provide cooled beams of antiprotons in the energy range between 300 keV down to 20 keV and possibly less. A large variety of the envisaged experiments including in-ring collision experiments with a reaction microscope require a comprehensive study of the long term beam dynamics processes in the ring. Detailed investigations into the ion kinetics under consideration of the effects from electron cooling and multiple scattering of the beam on a supersonic gas jet target have been carried out using the BETACOOL code. The life time, equilibrium momentum spread and equilibrium lateral spread during collisions with this internal gas jet target were estimated. The results from simulations were benchmarked against experimental data of beam losses in the ELISA storage ring. In addition, the results from experiments at the TSR ring where a 93 keV/u beam CF+ ions has been shrunk to extremely small dimensions have been reproduced. Based on these simulations, conditions for stable ring operation with extremely low emittance beam are presented. Finally, results from studies into the interaction of ions with a gas jet target at very low energies are summarized.
	Slides

TUPS03	Closed Orbit Correction in 2 MeV Electron Cooler Section at COSY-Juelich	electron, dipole, injection, closed-orbit	92
	L. J. Mao, J. Dietrich, V. Kamerdzhiev, B. Lorentz, H.-J. Stein FZJ, Jülich
	A 2 MeV magnetized electron cooling system will be installed in COSY to boost the luminosity for future high density internal target experiments. For an effective electron cooling, the proton beam and electron beam have to overlap coaxially, it lead to the necessity of a good orbit correction in cooler section. Since the toroid magnets, the proton beam orbit distortion is anti-symmetric in horizontal plane. With steerers at each side of cooler, the proton beam can be made coaxial in the cooler and the deflection can be compensated. The distortion caused by bending coils in toroid is symmetric in vertical plane. A four-bump method is suggested for correction. Using the magnetic field data measured in BINP, we calculated the orbit distortion of proton beam at injection energy, and investigated the scheme of closed orbit correction. The simulation of orbit distortion and result of the correction are presented in this paper.

TUPS21	The Nonlinear Transformation of a Ions Beam in the Plasma Lens	plasma, focusing, target, cathode	144
	A. A. Drozdovsky, N. N. Alexeev, S. A. Drozdovsky, A. Golubev, Yu. B. Novozhilov, P. V. Sasorov, S. M. Savin, V. V. Yanenko ITEP, Moscow
	The plasma lens can carry out not only sharp focusing of ions beam. At those stages at which the magnetic field is nonlinear, formation of other interesting configurations of beams is possible. Plasma lens provides formation of hollow beams of ions in a wide range of parameters. Application of the several plasma lenses allow to create some nontrivial spatial configurations of ions beams: to get a conic and a cylindrical beams. The plasma lens can be used for transformation of beams with Gaussian distribution of particles density in a beams with homogeneous spatial distribution. The calculations showed that it is possible for a case of equilibrium Bennett's distribution of a discharge current . This requires a long duration of a discharge current pulse of > 10 mks. The first beam tests have essentially confirmed expected result. Calculations and measurements were performed for a C+6 and Fe+26 beams of 200-300 MeV/a.u.m. energy. The obtained results and analysis are reported. A. Drozdovskiy et al., IPAC'10, Kioto, Japan, http://cern.ch/AccelConf/IPAC10 /MOPE040. ** A. Drozdovskiy et al., RUPAC’10, Protvino, Russia, http://cern.ch/AccelConf/RUPAC10 /THCHA01.

TUPS22	Deceleration of Carbon Ions at the Heavy Ion Storage Ring TSR	electron, controls, injection, storage-ring	147
	S. T. Artikova, K. Blaum, M. Grieser, J. Ullrich, A. Wolf MPI-K, Heidelberg
	In order to evaluate the beam quality obtained after deceleration of 12C⁶⁺ ions at the heavy ion storage ring TSR, it is important to consider the possible sources of beam heating. In our experiments at the TSR Heidelberg carbon ions are injected at an energy of 73.3 MeV and decelerated them to 9.7 MeV in a cycle that includes two steps where beam cooling are applied. In this contribution we discuss the influences of intrabeam scattering (IBS) and the heating mechanisms on circulating ions. We will present results on the deceleration efficiency, the scaling of IBS rates with the beam energy and intensity, and studies of the phase space distribution during deceleration.