High-power test of the single-periodic magnetically coupled standing-wave accelerating structure for a proton therapy linac
Year: 2026
Type: article
Abstract: A single-periodic magnetically coupled standing-wave accelerating structure prototype operating at 3 GHz for low phase velocity particles has been designed as the first tank of the 30–230 MeV accelerating section for the compact proton therapy linac developed by the Institute of Modern Physics, Chinese Academy of Sciences. Fabrication and rf measurement of the prototype have been completed. High-power test of the prototype was performed. The cavity could operate stably at the effective input power of around 5.7 MW, corresponding to the accelerating gradient of 38 MV / m at the pulse length of 5 μ s and the repetition rate of 70 Hz. Further increasing the duty factor to 0.1%, the accelerating gradient decreased to 24 MV / m due to the uneven cooling of each single cell. The details of the high-power test setup and preparation, the process of rf conditioning, and the high-power test results are described in this paper. Limiting factors for higher accelerating gradients with high duty factors are discussed, and two novel cooling channel schemes are described.
DOI: 10.1103/9jql-8xgf
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7127620310