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  • Open Access

Novel scheme of beam loading compensation for a traveling wave acceleration structure with microwave pulse compression

Boyuan Feng, Hao Zha, Jiaru Shi*, and Huaibi Chen

  • Department of Engineering Physics, Tsinghua University, Beijing 100084, China and Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Tsinghua University, Beijing 100084, China

  • *Contact author: shij@tsinghua.edu.cn
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Phys. Rev. Accel. Beams 29, 083801 – Published 6 August, 2026

DOI: https://doi.org/10.1103/srsc-8j14

Abstract

In order to reduce the increase in bunch energy dispersion caused by the beam loading effect, beam loading compensation in the acceleration structure is required. In this paper, a novel scheme is proposed to use microwave pulse compression to compensate for the beam loading effect in the traveling wave structure. The compression system consists of an energy storage cavity and a correction chain of six cavities working in S band. Through parameter optimization, the optimal coupling factors of the energy storage cavity and the correction cavity are obtained to generate microwave pulses with increasing amplitude. Through this scheme, the S-band traveling wave acceleration structure achieves an acceleration voltage of 50.14 MV with a power input of 16.6 MW and a beam current of 2.5 A. The relative energy dispersion is 0.77%, and the effective system power gain reaches 10.56, significantly surpassing that of conventional microwave pulse compression systems.

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Phys. Rev. Accel. Beams 29, 083801– Published 6 August, 2026
  • Received 13 July 2025
  • Accepted 1 July 2026
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