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Title: Commissioning of HIRFL-CSR and its Electron Coolers

Abstract

The brief achievements of HIRFL-CSR commissioning and the achieved parameters of its coolers were presented. With the help of electron cooling code, the cooling time of ion beam were extensive simulated in various parameters of the ion beam in the HIRFL-CSR electron cooling storage rings respectively, such as ion beam energy, initial transverse emittance, and momentum spread. The influence of the machine lattice parameters-betatron function, and dispersion function on the cooling time was investigated. The parameters of electron beam and cooling devices were taken into account, such as effective cooling length, magnetic field strength and its parallelism in cooling section, electron beam size and density. As a result, the lattice parameters of HIRFL-CSR were optimal for electron cooling, and the parameters of electron beam can be optimized according to the parameters of heavy ion beam.

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2]
  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000 (China)
  2. Budker Institute of Nuclear Physics, Laverentyeva 11, Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
20798451
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 821; Journal Issue: 1; Conference: COOL05: International workshop on beam cooling and related topics, Galena, IL (United States), 18-23 Sep 2005; Other Information: DOI: 10.1063/1.2190094; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM DYNAMICS; BEAM OPTICS; BETATRONS; COMMISSIONING; CRYOGENICS; ELECTRON BEAMS; ELECTRON COOLING; ELECTRONS; HEAVY IONS; HIRFL CYCLOTRON; ION BEAMS; LATTICE PARAMETERS; MAGNETIC FIELDS; STORAGE RINGS

Citation Formats

Yang Xiaodong, Zhan Wenlong, Xia Jiawen, Zhao Hongwei, Yuan Youjin, Song Mingtao, Li Jie, Mao Lijun, Lu Wang, Wang Zhixue, and Parkhomchuk, Vasily. Commissioning of HIRFL-CSR and its Electron Coolers. United States: N. p., 2006. Web. doi:10.1063/1.2190094.
Yang Xiaodong, Zhan Wenlong, Xia Jiawen, Zhao Hongwei, Yuan Youjin, Song Mingtao, Li Jie, Mao Lijun, Lu Wang, Wang Zhixue, & Parkhomchuk, Vasily. Commissioning of HIRFL-CSR and its Electron Coolers. United States. doi:10.1063/1.2190094.
Yang Xiaodong, Zhan Wenlong, Xia Jiawen, Zhao Hongwei, Yuan Youjin, Song Mingtao, Li Jie, Mao Lijun, Lu Wang, Wang Zhixue, and Parkhomchuk, Vasily. Mon . "Commissioning of HIRFL-CSR and its Electron Coolers". United States. doi:10.1063/1.2190094.
@article{osti_20798451,
title = {Commissioning of HIRFL-CSR and its Electron Coolers},
author = {Yang Xiaodong and Zhan Wenlong and Xia Jiawen and Zhao Hongwei and Yuan Youjin and Song Mingtao and Li Jie and Mao Lijun and Lu Wang and Wang Zhixue and Parkhomchuk, Vasily},
abstractNote = {The brief achievements of HIRFL-CSR commissioning and the achieved parameters of its coolers were presented. With the help of electron cooling code, the cooling time of ion beam were extensive simulated in various parameters of the ion beam in the HIRFL-CSR electron cooling storage rings respectively, such as ion beam energy, initial transverse emittance, and momentum spread. The influence of the machine lattice parameters-betatron function, and dispersion function on the cooling time was investigated. The parameters of electron beam and cooling devices were taken into account, such as effective cooling length, magnetic field strength and its parallelism in cooling section, electron beam size and density. As a result, the lattice parameters of HIRFL-CSR were optimal for electron cooling, and the parameters of electron beam can be optimized according to the parameters of heavy ion beam.},
doi = {10.1063/1.2190094},
journal = {AIP Conference Proceedings},
number = 1,
volume = 821,
place = {United States},
year = {Mon Mar 20 00:00:00 EST 2006},
month = {Mon Mar 20 00:00:00 EST 2006}
}
  • HIRFL-CSR, a new ion accelerator complex, is under construction at IMP, Lanzhou, China. It is equipped with two electron cooling devices. This article describes the commissioning of cooler at electron energy 300 keV. The cooler is one of the new coolers with some unique manufactured in BINP, Russia. It has a new electron gun producing a hollow electron beam, electrostatic bending and a new structure of solenoid coils at the cooling section. The test results of cooler obtained in Novosibirsk and Lanzhou are reported.
  • We calculated the hypertriton production at RHIC-STAR and HIRFL-CSR acceptance, with a multi-phase transport model (AMPT) and a relativistic transport model (ART), respectively. In specific, we calculated the Strangeness Population Factor S{sub 3} = {sub {Lambda}}{sup 3}H/({sup 3}H{sub e} x {Lambda}/p) at different beam energy. Our results from AGS to RHIC energy indicated that the collision system may change from hadronic phase at AGS energies to partonic phase at RHIC energies. Our calculation at HIRFL-CSR energy supports the proposal to measure hypertriton at HIRFL-CSR.
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  • A cold electron target with a cryogenic GaAs-photocathode electron source was developed for the Heidelberg Test Storage Ring. Two independent electron facilities (cooler and target) allow to separate cooling of the ion beam from target operation improving the quality of electron and ion beams. In addition a strong gain in the resolution was achieved with a help of a cryogenic photoelecron source providing dc electron currents up to 0.5 mA with an emission energy spread of about 10 meV. In first recombination measurements at the target, performed on HD +, H{sub 3}{sup +} and Sc18+, low energy resonant structures atmore » milli-eV collision energies revealed unprecedented low transverse and longitudinal electron temperatures of about 0.5 meV and 0.025 meV, respectively. The photocathode source will be also used to provide cold beams for electron cooling of low-energy ions stored at the electrostatic Cryogenic Storage Ring which will be built at MPIK. The perspectives of photocathode-driven electron coolers operating at very low laboratory energies are discussed.« less
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