Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator

Jian Gao

doi:10.1007/s41365-023-01254-8

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Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator

ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS | Updated：2023-08-16

- Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator
- Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator
- 核技术（英文版） 2023年34卷第7期文章编号：110
- Affiliations：
  
  1.Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  2.Key Laboratory of Particle and Radiation Imaging (Tsinghua University), Ministry of Education, Beijing 100084, China
- Author bio：
  
  * shij@mail.tsinghua.edu.cn
- Funds：
  
  Key R&D Project of the Ministry of Science and Technology of China(2022YFC2402300)
- DOI：10.1007/s41365-023-01254-8
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Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator[J]. 核技术（英文版）, 2023, 34(7):110

Jian Gao, Hao Zha, Jia-Ru Shi, et al. Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator[J]. Nuclear Science and Techniques, 2023, 34(7):110
Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator[J]. 核技术（英文版）, 2023, 34(7):110 DOI： 10.1007/s41365-023-01254-8.

Jian Gao, Hao Zha, Jia-Ru Shi, et al. Design, fabrication, and testing of an X-band 9 MeV standing-wave electron linear accelerator[J]. Nuclear Science and Techniques, 2023, 34(7):110 DOI： 10.1007/s41365-023-01254-8.

摘要

Abstract

In this study, an X-band standing-wave biperiodic linear accelerator was developed for medical radiotherapy that can accelerate electrons to 9 MeV using a 2.4 MW klystron. The structure works at π/2 mode and adopts magnetic coupling between cavities, generating the appropriate adjacent mode separation of 10 MHz. The accelerator is less than 600 mm long and constitutes 4 bunching cells and 29 normal cells. Geometry optimizations, full-scale radiofrequency (RF) simulations, and beam dynamics calculations were performed. The accelerator was fabricated and examined using a low-power RF test. The cold test results showed a good agreement with the simulation and actual measurement results. In the high-power RF test, the output beam current, energy spectrum, capture ratio, and spot size at the accelerator exit were measured. With the input power of 2.4 MW, the pulse current was 100 mA and the output spot root-mean-square radius was approximately 0.5 mm. The output kinetic energy was 9.04 MeV with the spectral FWHM of 3.5%, demonstrating the good performance of this accelerator.

关键词

Keywords

Standing-wave accelerating structureRF analysisThermal DC gunLow-power RF testHigh-power experiment

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