Imai N, Jeong S C, Oyaizu M, Arai S, Fuchi Y, Hirayama Y, Ishiyama H, Miyatake H, Tanaka M H, Okada M, Watanabe Y X, Ichikawa S, Kabumoto H, Osa A, Otokawa Y, Sato T K
High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
Rev Sci Instrum. 2008 Feb;79(2 Pt 2):02A906. doi: 10.1063/1.2828070.
The KEKCB is an electron cyclotron resonance (ECR) ion source for converting singly charged ions to multicharged ones at Tokai Radioactive Ion Accelerator Complex. By using the KEKCB, singly charged gaseous and nongaseous ions were converted to multicharged ones of A/q approximately 7 with efficiencies of 7% and 2%, respectively. The conversion efficiency was found to be independent of the lifetime of the radioactive nuclei having lifetimes of the order of one second. Three collimators located at the entrance and the exit of the KEKCB defined the beam axis and facilitated beam injection. Grinding and washing the surfaces of aluminum electrode and plasma chamber dramatically reduced impurities originating from the ECR plasma of the KEKCB.
KEKCB是一种电子回旋共振（ECR）离子源，用于在东海放射性离子加速器综合体中将单电荷离子转换为多电荷离子。通过使用KEKCB，单电荷气态离子和非气态离子分别以7%和2%的效率被转换为A/q约为7的多电荷离子。发现转换效率与寿命约为一秒的放射性核的寿命无关。位于KEKCB入口和出口的三个准直器确定了束轴并便于束注入。研磨和清洗铝电极及等离子体室的表面显著减少了源自KEKCB的ECR等离子体的杂质。
