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Fabrication, tuning, and high-gradient testing of an X-band traveling-wave accelerating structure for VIGAS

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Abstract

X-band high-gradient linear accelerators are a challenging and attractive technology for compact electron linear-accelerator facilities. The Very Compact Inverse Compton Scattering Gamma-ray Source (VIGAS) program at Tsinghua University will utilize X-band high-gradient accelerating structures to boost the electron beam from 50 to 350 MeV over a short distance. A constant-impedance traveling-wave structure consisting of 72 cells working in the 2π/3 mode was designed and fabricated for this project. Precise tuning and detailed measurements were successfully applied to the structure. After 180 h of conditioning in the Tsinghua high-power test stand, the structure reached a target gradient of 80 MV/m. The breakdown rate versus gradient of this structure was measured and analyzed.

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Authors and Affiliations

  1. Department of Engineering Physics, Tsinghua University, Bei**g, 100084, China

    **an-Cai Lin, Hao Zha, Jia-Ru Shi, Qiang Gao, Jia-Yang Liu, Liu-Yuan Zhou, Jian Gao, Huai-Bi Chen & Chuan-**ang Tang

  2. Key Laboratory of Particle and Radiation Imaging (Tsinghua University), Ministry of Education, Bei**g, 100084, China

    **an-Cai Lin, Hao Zha, Jia-Ru Shi, Qiang Gao, Jia-Yang Liu, Liu-Yuan Zhou, Jian Gao, Huai-Bi Chen & Chuan-**ang Tang

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  1. **an-Cai Lin
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  2. Hao Zha
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  4. Qiang Gao
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  9. Chuan-**ang Tang
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Contributions

All the authors contributed to the conception and design of the study. Material preparation, data collection, and analysis were performed by **an-Cai Lin, Liu-Yuan Zhou, Qiang Gao, Jian Gao, and Jia-Yang Liu. The first draft of the manuscript was written by **an-Cai Lin, and all the authors commented on the previous versions of the manuscript. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Jia-Ru Shi.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 11922504 and 12027902).

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Lin, XC., Zha, H., Shi, JR. et al. Fabrication, tuning, and high-gradient testing of an X-band traveling-wave accelerating structure for VIGAS. NUCL SCI TECH 33, 102 (2022). https://doi.org/10.1007/s41365-022-01086-y

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