AUTHOR=Li Hongyu , Zha Hao , Lin Xiancai , Gao Qiang , Liu Focheng , Shi Jiaru , Chen Huaibi 

TITLE=Design of a 100-MeV compact VHEE beam line in Tsinghua University

JOURNAL=Frontiers in Physics

VOLUME=Volume 12 - 2024

YEAR=2025

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2024.1496272

DOI=10.3389/fphy.2024.1496272

ISSN=2296-424X

ABSTRACT=A 100-MeV Compact Electron Accelerator design has been proposed for Very High Energy Electron (VHEE) radiotherapy research at Tsinghua University. The microwave source for this system is a 50 MW X-band klystron, paired with a pulse compressor featuring a correction cavity chain. During high-power test, the system achieved a flat-top power gain three times the input. The acceleration system consists of three main components: a backward traveling-wave buncher that bunches and accelerates electrons from a thermionic cathode gun to 8 MeV, followed by two 72-cell X-band constant-gradient traveling-wave accelerating structures, which further increase the electron energy to 100 MeV with a gradient of 80 MV/m. The total length of the system is 1.8 m, and its design is detailed in this paper.