Pikin A, Alessi J, Beebe E, Kponou A, Okamura M, Raparia D, Ritter J, Tan Y, Kuznetsov G
Brookhaven National Laboratory, Upton, New York 11973, USA.
Rev Sci Instrum. 2012 Feb;83(2):02A504. doi: 10.1063/1.3666915.
RHIC electron beam ion source has been commissioned to operate as a versatile ion source on RHIC injection facility supplying ion species from He to Au for Booster. Except for light gaseous elements RHIC EBIS employs ion injection from several external primary ion sources. With electrostatic optics fast switching from one ion species to another can be done on a pulse to pulse mode. The design of an ion optical structure and the results of simulations for different ion species are presented. In the choice of optical elements special attention was paid to spherical aberrations for high-current space charge dominated ion beams. The combination of a gridded lens and a magnet lens in LEBT provides flexibility of optical control for a wide range of ion species to satisfy acceptance parameters of RFQ. The results of ion transmission measurements are presented.
相对论重离子对撞机电子束离子源已投入运行，作为相对论重离子对撞机注入设施上的通用离子源，为增强器提供从氦到金的各种离子种类。除了轻质气态元素外，相对论重离子对撞机电子束离子源采用来自多个外部初级离子源的离子注入。借助静电光学系统，可以在脉冲到脉冲模式下快速从一种离子种类切换到另一种离子种类。本文介绍了离子光学结构的设计以及针对不同离子种类的模拟结果。在光学元件的选择上，特别关注了高电流空间电荷主导离子束的球差。低能束传输段中栅极透镜和磁透镜的组合为多种离子种类提供了灵活的光学控制，以满足射频四极加速器的接受参数。文中给出了离子传输测量结果。
