Open AccessA novel microwave switch-based LLRF system for long-term system phase drift calibration
Author(s) -
Zuzhang Lin,
Ying Du,
Wenhui Huang,
Jiahuan Tang,
Chuanxiang Tang,
Gang Huang,
Xu Yan,
D. Zhang,
Zhiyuan Sun
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1350/1/012160
Subject(s) - microwave , physics , detector , phase (matter) , phase shift module , electronic engineering , electrical engineering , optics , engineering , quantum mechanics
Long-term phase stability is a significant issue for Low-level RF systems. Crosstalk and temperature effect on the RF field detectors would significantly limit the performance of phase detecting and phase locking. A novel microwave switch-based LLRF system has been developed in Tsinghua Accelerator Lab. Microwave switches are applied in the chopper circuit to turn continuous waves into pulse waves in the time domain to avoid mutual interference of signals. In this paper, the LLRF sys-tem based on microwave switches is presented. The result of preliminary long-term experiments shows the phase stability can achieve about 50fs RMS slow drift. The peak-to-peak value of the slow drift was ~100fs (~2 °C p-p) in 4 days.