Injection transient study using a two-frequency bunch length measurement system at the SSRF

• DOI: 10.1007/s41365-017-0247-2
• Publication Date: 2017-05-26T03:39:57Z
• Authors: Li-Wu Duan; Yong-Bin Leng; Ren-Xian Yuan; Zhi-Chu Chen
• Keywords: Transient (computer programming); Length measurement; Oscillation (cell signaling); SIGNAL (programming language)

The bunch length can be measured by comparison of two frequency components of a synchrotron beam signal. An online bunch length measurement system has been implemented based on this method. Working frequencies of 3 GHz and 500 MHz were selected, and the raw data was acquired by digital oscilloscope and was resampled and analyzed using the MATLAB software platform at bunch-by-bunch rate. The constructed system was employed to study the bunch length synchronous oscillation phenomenon during injection. The beam experiments demonstrated a time resolution of less than 0.5 ps.