Libera数字束流位置处理器在工作点测量中的应用  

Application of digital beam position processor Libera on tune measurement

作　　者：张春晖[1] 孙葆根[1] 曹涌[1] 卢平[1] 李吉浩[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《强激光与粒子束》2006年第6期1003-1006,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(10275062)

摘　　要：数字信号处理技术在现代束流诊断中有成熟的应用,特别是在束流位置检测器信号分析和工作点测量时有优越的性能。在合肥光源工作点测量中,采用高斯白噪声激励起束流横向振荡,再利用Libera数字束流位置处理器采集激励后的束流位置信号,并进行幅度解调得到束流横向振荡频率,再利用Matlab进行快速傅里叶分析处理,得到工作点的小数部分,从而实现工作点测量。在合肥光源上进行实验,测量得到其水平工作点是3.535 2,垂直工作点是2.629 9。Digital signal processing （DSP） is widely used in the field of beam diagnostics. Especially, DSP achieves very good performance in beam position signal analysis and betatron tune measurement. In Hefei light source, when beam was excited by narrow-band Gaussian white noise, Libera, a digital beam position processor, was used to process the signals from beam position monitor （BPM）, which contained betatron oscillation. Fast Fourier transform （FFT） was applied to finding out betatron resonance frequency, from which the decimal part of betatron oscillation tune was calculated. By this means, the measure of horizontal tune was 3. 535 2 and the measure of vertical tune is 2. 629 9.

关 键 词：数字信号处理 工作点 束流位置信号 横向振荡频率 

分 类 号：TL506[核科学技术—核技术及应用]