Optimization of the S-band side-coupled cavities for proton acceleration
| Autor: | Zhi-Hui Li, Wei Chen, Chen-Hui Shi, Hao-Yun Li, Xin-Miao Wan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Shunt impedance Proton 010308 nuclear & particles physics Cyclotron 01 natural sciences Linear particle accelerator law.invention Computational physics Acceleration Nuclear Energy and Engineering law Electric field 0103 physical sciences Physics::Accelerator Physics Equivalent circuit 010306 general physics Beam (structure) |
| Zdroj: | Nuclear Science and Techniques. 31 |
| ISSN: | 2210-3147 1001-8042 |
| Popis: | The proton beam with energy around 100 MeV has seen wide applications in modern scientific research and in various fields. However, proton sources in China fall short for meeting experimental needs owing to the vast size and expensive traditional proton accelerators. The Institute of Nuclear Science and Technology of Sichuan University proposed to build a 3 GHz side-coupled cavity linac (SCL) for re-accelerating a 26 MeV proton beam extracted from a CS-30 cyclotron to 120 MeV. We carried out investigations into several vital factors of S-band SCL for proton acceleration, such as optimization of SCL cavity geometry, end cell tuning, and bridge coupler design. Results demonstrated that the effective shunt impedance per unit length ranged from 22.5 to 59.8 MΩ/m throughout the acceleration process, and the acceleration gradient changed from 11.5 to 15.7 MV/m when the maximum surface electric field was equivalent to Kilpatrick electric field. We obtained equivalent circuit parameters of the biperiodic structures and applied them to the end cell tuning; results of the theoretical analysis agreed well with the 3D simulation. We designed and optimized a bridge coupler based on the previously obtained biperiodic structure parameters, and the field distribution un-uniformness was |
| Databáze: | OpenAIRE |
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