X-Band Amplifier for the PAL-XFEL

Recent X-ray free electron lasers based on a high-energy high-current linear accelerator, such as the Pohang Accelerator Laboratory (PAL-XFEL) uses a third harmonic radio-frequency (RF) linearizer system to improve the laser's longitudinal beam quality. Because the X-ray free electron laser at...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2020, 76(7), , pp.573-576
Main Authors: Heo, Hoon, Hu, Jin-Yul, Lee, Heung-Soo, Kang, Heung-Sik, Lee, Su Hyun, Chang, Jin Ho, Lee, Dong Heon
Format: Article
Language:English
Subjects:
Accelerators
Free electron lasers
Laser beams
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Radio frequency
Solid state
Superhigh frequencies
Theoretical
Traveling wave tubes
Traveling waves
물리학
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Summary:Recent X-ray free electron lasers based on a high-energy high-current linear accelerator, such as the Pohang Accelerator Laboratory (PAL-XFEL) uses a third harmonic radio-frequency (RF) linearizer system to improve the laser's longitudinal beam quality. Because the X-ray free electron laser at the PAL-Xfel uses 2856 MHz RF accelerators, we realized a RF linearizer of 11.424 GHz which afforded a 50 MW RF power by using a SLAC X-band klystron. Operation of the X-band klystron required an X-band amplifier with a 1 kW level at the specified frequency of 11.424 GHz. We tested two types of X-band amplifier, a traveling wave tube amplifier and a solid state amplifier. In this work, we present the test results and discuss the features, especially focusing on the X-band solid state amplifier.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.76.573