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RIS citation export for THPO091: 90 kW Solid-state RF Amplifier with a TE011-mode Cavity Power-combiner at 476 MHz

AU  - Otake, Y.
AU  - Aizawa, S.
AU  - Asaka, T.
AU  - Inagaki, T.
AU  - Nagatsuka, K.
AU  - Okuyama, T.
AU  - Sato, K.
AU  - Yamada, H.
ED  - Schaa, Volker RW
ED  - Pei, Guoxi
ED  - Chin, Yong Ho
ED  - Fu, Shinian
ED  - Zhao, Ning
TI  - 90 kW Solid-state RF Amplifier with a TE011-mode Cavity Power-combiner at 476 MHz
J2  - Proc. of LINAC2018, Beijing, China, 16-21 September 2018
CY  - Beijing, China
T2  - Linear Accelerator Conference
T3  - 29
LA  - english
AB  - Solid-state RF amplifiers, which have long lifetimes and small failures, are the recent trend of reliable and stable high-power rf sources for particle accelerators. Hence, we designed a 90kW solid-state amplifier with an extreme low-loss TE011 mode cavity (Q0=100, 000) power-combiner operated at 476 MHz and a 6 us pulse width. Developing this amplifier is for replacement of an IOT rf amplifier, at the X-ray free-electron laser, SACLA. In SACLA, highly RF phase and amplitude stabilities of less than 0.02 deg. and 10⁻⁴ in rms are necessary to stable lasing within a 10 % intensity fluctuation. The amplifier comprises a drive amplifier, a reentrant cavity rf power divider, 100 final amplifiers with a 1 kW output each and a TE011 mode cavity combiner. Water-cooling within 10 mK and a DC power supply with a noise of less than -100 dBV at 10 Hz for the amplifier is necessary to realize the previously mentioned stabilities. Based on the test results of the amplifier, the above-mentioned specifications with the extreme low-loss are promising. The amplifier also allows us to operate in pulsed and CW rfs for linacs and ring accelerators. We report the performance of the 90kW amplifier.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 889
EP  - 892
KW  - cavity
KW  - controls
KW  - power-supply
KW  - rf-amplifier
DA  - 2019/01
PY  - 2019
SN  - 2226-0366
SN  - 978-3-95450-194-6
DO  - DOI: 10.18429/JACoW-LINAC2018-THPO091
UR  - http://jacow.org/linac2018/papers/thpo091.pdf
ER  -