Measurements of coupling impedance for the sns accumulator ring.

Wang, ; Zhang,

Technical Information Center Oak Ridge Tennessee

关键词: Spallation;    Storage rings;    Impedance;    Beam position;    Kicker magnets;   

RP-ID  :  DE2001779670

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The measurements of coupling impedance for the US Spallation Neutron Source (SNS) ring are presented. The work involves a strip-line Beam Position Monitor (BPM) and a window-frame kicker magnet. The conventional wire method is employed with improved formulas. The SNS Accumulator Ring is designed to contain a proton bunch of 2* 10(sup 14) particles at 1 GeV with a repetition rate of 60 Hz for achieving 2 MW output power. This will be the highest intensity of proton beams in the world. Care must be taken to prevent collective instabilities. An accurate impedance budget of the ring components supported by experiments is essential. Therefore, an important piece of the ring design is to measure the coupling impedance of some critical ring components and to compare with theory, model and simulation in order to gain confidence in the ring design. In this paper we report the measurements of coupling impedance of a strip-line BPM and a window-frame kicker magnet for the SNS accumulator ring.