HIRFL Operation and Upgrade

After almost one year shutdown for upgrading the vacuum chamber of the iniector SFC,SFC has been in operation separately since May 2003. The SFC operation statistics and accelerated heams from May to December 2003 are shown in Table 1 and 2. The main cyclotron SSC has beenfor still shut down in 2003 for upgrading the SSC power supply system, control and diagnostic system, and themain experimental area, LECR3, an ECR ion source dedicated for atomic physics and surface physics research, has provided 2488 hours beams for experiments of atomic physics research.     

Operation of LECR2 for HIRFL Facility

LECI:L2 (Lanzhou Electron Cyclotron l:tesonance No.2) is a 14.5 GHz ECR ion source (ECRIS) used at the axial injection beam line as an external ion source of the injector SFC. In 2003, to be adapted with the SFC reconstruction and modification, the source was moved from the north side of the beam line to the east side, and the other source LECR1 worked at 10 GHz was removed from the beam line. At the moment LECR2 is the only ion source in service for HIRFL accelerators.     

HIRFL—CSR电子冷却系统

建议中的兰州重离子加速器冷却贮存环（ＨＩＲＦＬ－ＣＳＲ）拟采用电子冷却方法将重离子束冷却到３００ＭｅＶ／ｕ。最高电子能量为１６５ｋｅＶ，最大电子电流密度主０．２４４Ａ／ｃｍ＾２，叙述了ＣＳＲ电子冷却装置的初步方案。     

HIRFL—CSR电子冷却装置上的横向电子束温度

从磁场中单电子的轨道运动方程出发，分析并推出了ＨＩＲＦＬ－ＣＳＲ电子冷却装置上的横向电子束温度，并得到了一些重要结论。