Eddy current septum magnets for injection and extraction at SSRF
- 作者：Ouyang L.Gu M.Chen Z.Chen R.Liu B.
- 会议时间：2011-09-01
- 关键词：injection and extraction ; eddy current ; septum magnets ; leakage field
- 作者单位：SSRF, Shanghai 201203, China
- 母体文献：2011海洋和综合地球物理发展研讨会论文集
- 会议名称：2011海洋和综合地球物理发展研讨会
- 会议地点：上海
- 主办单位：中国地球物理学会
- 语种：chi
摘要
There are 6 in-vacuum eddy current septum magnets used for booster injection, extraction, and storage ring injection in SSRF.Good transverse homogeneity in the gap was achieved by careful design, precise machining and accurate assembly; and an extremely low leakage field on the stored beam is a key feature thanks to the high permeability Mu metal.Magnetic field measurement was conducted with both a search coil and a long integral coil, and the results agree well with the OPERA-2d/3d simulations.An inner tube is added to keep the continuity of impedance for the circulating beam with two RF finger flanges at each end.Sputter ion pumps integrated with NEG are used to acquire the UHV for the chamber.