Preliminary Impedance Budget for NSLS-II Storage Ring.

Blednykh, A. ; Krinsky, S.

Technical Information Center Oak Ridge Tennessee

关键词: Storage rings;    Beam bunching;    Impedance;    Electron beams;    Wakefield accelerators;   

RP-ID  :  DE2007913418

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The wakefield and impedance produced by the components of the NSLS-II storage ring have been computed for an electron bunch length of 3mm rms. The results are summarized in a table giving for each component, the loss factor, the imaginary part of the longitudinal impedance at low frequency divided by the revolution harmonic, and the transverse kick factors. In order to be able to accurately estimate the instability threshold currents in the NSLS-II storage ring, it is necessary to have a reliable model of the ring impedance. In this note, we report work in progress aimed at evaluating the ring impedance. Extensive calculations of the impedance and wakefields produced by the components of the vacuum vessel have been performed using the electromagnetic simulator.