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RIS citation export for THPRB117: Stability and Reliability Issues of PAL-XFEL Modulator

AU  - Kim, S.H.
AU  - Kang, H.-S.
AU  - Kim, K.H.
AU  - Lee, H.-S.
AU  - Min, C.-K.
AU  - Park, S.S.
AU  - Park, Y.J.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Stability and Reliability Issues of PAL-XFEL Modulator
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) employs 51 units of the pulse modulator in order to obtain the 10 GeV electron beam, which drive one X-band to linearize and 50 S-band klystrons. The PAL-XFEL requires very tight control of the klystron RF phase jitter 0.03-degree for S-band RF, 0.1-degree for X-band RF and the beam voltage stability of below 50 ppm. The RF phase jitter is directly related to the amplitude stability of modulator output pulses. There are several factors to satisfy the stability and reliability for the PAL-XFEL modulator. The largest sources of pulse-to-pulse instability are a current charging power supply (CCPS) for PFN charging, a thyratron switch, and a klystron focusing magnet power supply (MPS). In this paper, the operation and debugging results of those devices are described.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 4096
EP  - 4099
KW  - klystron
KW  - operation
KW  - power-supply
KW  - electron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPRB117
UR  - http://jacow.org/ipac2019/papers/thprb117.pdf
ER  -