https://doi.org/10.1140/epjs/s11734-025-01826-2
Regular Article
X-band high-gradient main linear accelerator for compact inverse-compton light source
1
Department of Engineering Physics, Tsinghua University, 100084, Beijing, China
2
Key Laboratory of Particle and Radiation Imaging, Tsinghua University, 100084, Beijing, China
Received:
2
March
2025
Accepted:
21
July
2025
Published online:
11
August
2025
The inverse Compton scattering gamma-ray source is a remarkable technology due to its exceptional monochromaticity, adjustable energy features, and controllable polarization capabilities. These attributes make it an invaluable tool for various scientific and industrial applications. The Very Compact Inverse Compton Scattering Gamma-Ray Source (VIGAS) is a gamma-ray source program currently in development at Tsinghua University. VIGAS aims to produce monochromatic high-energy gamma rays ranging from 0.2 to 4.8 MeV by leveraging the interaction between electron beams with energies ranging from 50 to 350 MeV and laser photons with wavelengths of 400 or 800 nanometers within a beamline that spans 12 m. This unique combination allows for the generation of gamma rays with specific energy levels and characteristics, making it highly suitable for advanced research and experimental purposes. To achieve both the required energy levels and the compact footprint of VIGAS, a constant gradient (CG) traveling wave structure was specifically designed and fabricated for this project. The main linear accelerator(LINAC) consists of 6 accelerating structures, which consists of 72 cells operating in the 2
/3 mode, working at a frequency of 11.424 GHz and an accelerating gradient of 80 MV/m. The physics design of accelerating structures is reviewed in this paper. We also report the tuning and high-power test results of the currently operating accelerating structure.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
