Author: Yang, X.D.
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TUXAUD04
 Conceptual Design of the HIAF Electron Cooling System  
 
  • L.J. Mao, W.P. Chai, J. Li, P. Li, X.M. Ma, G.D. Shen, L.N. Sheng, M.T. Tang, J.W. Xia, T.L. Yan, J.C. Yang, X.D. Yang, D.Y. Yin, Y.J. Yuan, H. Zhao
    IMP/CAS, Lanzhou, People's Republic of China
  
  A new accelerator complex HIAF is under design at IMP Lanzhou to provide intense primary and radioactive ion beams for nuclear physics, atomic physics and applied researches. The key parts of HIAF are the booster ring which is used to accumulated heavy ions and the spectrometer ring which can be used as platform for nuclear and atomic physics experiments. A magnetized electron cooling device is supposed to be used in the booster ring for decreasing the transverse emittance of injected beams. Meanwhile, a magnetized electron cooling device together with a ultra-low temperature electron target are also considered to be equipped in the spectrometer ring. In this paper, the conceptual design and main parameters of the electron cooling devices are presented, and the instabilities of cooled high intensity heavy-ion beams are discussed preliminarily.  
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TUYAUD03 Formation of Bunched Electron Beam at the Electron Cooler of CSRm 85
 
  • X.D. Yang, J. Li, X.M. Ma, L.J. Mao, M.T. Tang, T.L. Yan
    IMP/CAS, Lanzhou, People's Republic of China
  
  The motivation for formation of bunched electron beam at the electron cooler of CSRm is based on the three requirements. Firstly, the high energy electron cooling, especially, the ion beam with TeV energy, the bunched electron beam for cooling would be easier than the DC operating mode. Secondly, the electric field induced by the intensity modulated electron beam will be used for the suppression of instability developed in the high intensity ion beam after accumulation with the help of electron cooling, Thirdly, the electron beam was required to turn on and off in the different period of the atomic physics experiments. Some initial design and consideration were presented in this paper. And also the current situation and condition of CSRm electron cooler were described here. An off-line testbench will be established in the laboratory, and the test and the optimization will be explored in this experimentation. The validity of this system will be verified in the near future. The procedure of the modulation on the voltage of control electrode in the electron gun of the CSRm cooler was discussed. The scheme of off-line measurement was devised according to the progress.  
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THXCR04
 Status and Upgrade of HIRFL Accelerator Complex at IMP  
 
  • Y.J. Yuan, X.J. Hu, X.N. Li, X. Ma, L.J. Mao, J.X. Wu, J.W. Xia, J.C. Yang, W.Q. Yang, X.D. Yang, H.W. Zhao
    IMP/CAS, Lanzhou, People's Republic of China
  
  The Heavy Ion Research Facility at Lanzhou (HIRFL) is the only one large scale heavy ion accelerator complex that uses cyclotron(SFC and SSC) as injector, synchrotron(CSRm) for accumulation and post acceleration, storage ring(CSRe) for in ring experiments in China. To reach the increasing requirements from nuclear physics, atomic physics, interdisciplinary science and their applications, many upgrading plans were launched or scheduled. The present status and recent upgrading plans of HIRFL will be introduced in this paper. The operation of the electron coolers and related cooling experimental results are presented. For the upgrading plans, the development of new Linac injector for HIRFL and the new high voltage system of 300keV electron cooler will be discussed in details.  
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