acceleration

Paper	Title	Other Keywords	Page
MOIO01	Electron Cooling Performance at IMP Facility	electron, ion, accumulation, storage-ring	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
TUPS13	Electron Cooler for NICA Collider	electron, gun, cathode, feedback	125
	S. Yakovenko, E. V. Ahmanova, A. G. Kobets, I. N. Meshkov, R. Pivin, A. Yu. Rudakov, A. V. Smirnov, N. D. Topilin, Yu. A. Tumanova JINR, Dubna, Moscow Region A. A. Filippov Allrussian Electrotechnical Institute, Moskow A. V. Shabunov JINR/VBLHEP, Moscow
	The electron cooling system at electron energy up to 2.5 MeV for the NICA collider is under design at JINR. The electron cooler is developed according to the available world practice of similar systems manufacturing. The main peculiarity of the electron cooler for the NICA collider is using of two cooling electron beams (one electron beam per each ring of the collider) that never has been done before. The acceleration and deceleration of the electron beams is produced by common high-voltage generator. The conceptual design of the electron cooling system has been developed. The cooler consist of three tanks. Two of them contain acceleration/deceleration tubes and are immersed in superconducting solenoids. The third one contains HV generator, which design is based on voltage multiplying scheme