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@inproceedings{chang:ipac2021-wepab296,
author = {F.Y. Chang and M.H. Chang and S.W. Chang and L.J. Chen and F.-T. Chung and Y.D. Li and M.-C. Lin and Z.K. Liu and C.H. Lo and Ch. Wang and M.-S. Yeh and T.-C. Yu},
% author = {F.Y. Chang and M.H. Chang and S.W. Chang and L.J. Chen and F.-T. Chung and Y.D. Li and others},
% author = {F.Y. Chang and others},
title = {{A Klystron Phase Lock Loop for RF System at TPS Booster Ring}},
booktitle = {Proc. IPAC'21},
pages = {3354--3356},
eid = {WEPAB296},
language = {english},
keywords = {controls, cathode, klystron, LLRF, injection},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB296},
url = {https://jacow.org/ipac2021/papers/wepab296.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB296},
abstract = {{In TPS booster ring, the DLLRF is used to controlled the ramping gap voltage and also the energy saving module is applied to save power while the ring does not inject beam. But we occurred to have a problem of PI saturation due to a large phase change when the energy saving module working. The energy saving module switches the anode voltage of the klystron from high to low level to decrease the cathode current while the ring does not inject and do the opposite while the ring injects. This action causes a large phase change of the transmitter and leads the PI controller to work in the wrong direction. We add a klystron phase loop to solve this situation.}},
}