Yuan, Y. J.

Paper	Title	Page
MOIO01	Electron Cooling Performance at IMP Facility	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
TUPS14	Simulation Study of Stochastic Cooling at CSRe IMP
	X. J. Hu, H. Jia, J. X. Wu, J. W. Xia, Y. J. Yuan, Y. Zhang IMP, Lanzhou T. Katayama GSI, Darmstadt
	The stochastic cooling of Radio Isotope beam is planned at the storage ring CSRe at the Institute of Modern Physics, Lanzohu in China. The stochastic cooling is planned as a pre-cooling of the electron cooling. The initial transverse emittance is assumed as 30 Pi mm.mrad, and the relative momentum spread is ± 5·10-3. The particle number is as small as 5·103. The palmer method is conceived as the PU and Kicker are installed at the finite dispersion section of the bending magnet chamber. In the present paper, details of simulation results of longitudinal and transverse cooling process are discussed.