Long-term timing stabilization for pump-probe experiments at SACLA.

• Tác giả: Shigeki Owada, Tadashi Togashi, Makina Yabashi, Toshinori Yabuuchi
• Ngôn ngữ: eng
• Thông tin xuất bản: United States : Journal of synchrotron radiation , 2025
• Bộ sưu tập: NCBI
• ID: 690559

Tóm tắt

We have developed a timing control system to stabilize the long-term timing drift between X-ray free-electron laser (XFEL) and optical laser pulses using an out-of-loop balanced optical-microwave phase detector and an arrival-timing monitor for pump-probe experiments at the SPring-8 Ångstrom Compact free-electron LAser (SACLA). The timing jitter and drift between the XFEL and the optical laser pulses have been reduced to less than 50 fs (RMS) over ∼49 h. The performance of the timing stabilization system was investigated by measuring the correlation of the long-term simultaneous timing monitoring on two branches of BL3 over 8 h. A linear correlation was observed with an RMS error of 8.6 fs.