| WEP074 ポスター① 7月31日 3F交流室A 13:00-15:00 |
| Sバンド高効率マルチビームクライストロンのRFセクションの設計研究とモデリング |
| Design study and modeling of the RF section for an S-band high-efficiency multi-beam klystron |
| ○王 盛昌，松本 修二，夏井 拓也，松本 利広，三浦 孝子，福田 茂樹（KEK） |
| ○Shengchang Wang, Shuji Matsumoto, Takuya Natsui, Toshihiro Matsumoto, Takako Miura, Shigeki Fukuda (KEK) |
| An S-band high-efficiency multi-beam klystron is currently in development to modernize the existing 50MW klystron utilized in the KEK e+/- injector. With an emphasis on energy conservation, the RF-section of this multi-beam klystron is designed to achieve a target efficiency of 73%, a substantial improvement from the 45% efficiency of the current 50MW klystron. Initial parameter selection is facilitated using a two-dimensional particle-in-cell code. The final design comprises 6 cavities, projecting an efficiency of 76%. Subsequently, A detailed three-dimensional model is built based on this layout. The three-dimensional particle-in-cell simulation confirms the efficiency of 73%. Tolerance analysis is performed to assess practical scenarios deviating slightly from the design specifications. Moreover, the impact of cavity high-order modes on klystron performance is evaluated and optimized through three-dimensional simulations. A comprehensive simulation encompassing the RF section, electron gun, and focusing magnetic field is also conducted. |