Development of an S-band accelerating structure with quasi-symmetric single-feed racetrack couplers

We developed an S-band traveling-wave accelerating structure for the Pohang Accelerator Laboratory’s X-ray free-electron laser (PAL-XFEL), and we fabricated and tested a full-scale prototype. In order to reduce the field asymmetry inside the coupler cavity, we used the SUPERFISH code and the CST MWS...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2015, 66(6), , pp.905-914
Main Authors: Heo, Hoon, Joo, Young-Do, Park, Yong-Jung, Kang, Heung-Sik, Lee, Heung-Soo, Oh, Kyoung-Min, Seo, Hyung-Seok, Noh, Sung-Ju
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:We developed an S-band traveling-wave accelerating structure for the Pohang Accelerator Laboratory’s X-ray free-electron laser (PAL-XFEL), and we fabricated and tested a full-scale prototype. In order to reduce the field asymmetry inside the coupler cavity, we used the SUPERFISH code and the CST MWS electromagnetic field solvers to design the constant-gradient traveling-wave accelerator to use quasi-symmetric single-feed racetrack couplers. The RF measurement results indicate that the accelerating gradient of the prototype structure is as high as 27 MV/m for an input RF power of 65 MW.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.66.905