THO709
ビーム診断・高周波源 8月7日 7号館71A/71B 17:00-17:20
The challenges of the LIPAc circulators toward high duty cycle
The challenges of the LIPAc circulators toward high duty cycle
○廣澤 航輝1, Scantamburlo Francesco2, Moya Ivan2, Gonzalez-Gallego Luis3, Adam Jean-Pierre4, 2, 久保 直也1, 佐々木 照将1, 阿部 航1, 近藤 恵太郎1, Carin Yann2（1量子科学技術研究開発機構 六ケ所フュージョンエネルギー研究所, 2Fusion for Energy, 3IFMIF-DONES España, 4CEA Paris-Saclay）
○Kouki Hirosawa1, Francesco Scantamburlo2, Ivan Moya2, Luis Gonzalez-Gallego3, Jean-Pierre Adam4, 2, Naoya Kubo1, Terumasa Sasaki1, Wataru Abe1, Keitaro Kondo1, Yann Carin2（1QST Rokkasho Institute for Fusion Energy, 2Fusion for Energy, 3IFMIF-DONES España, 4CEA Paris-Saclay）
The Linear IFMIF Prototype Accelerator (LIPAc) is a deuteron accelerator that aims to accelerate the 125mA beam up to 9MeV in the continuous wave (CW) operation mode. The objective of the facility is validation of technological and scientific aspects of the base design and to clarify the further challenges towards the 40MeV-125mA-CW deuteron beam for the accelerator part. The RF system of the LIPAc is designed to provide 1.2MW power in total to the RFQ, driven by eight amplification lines up to 200kW per station. In the present operation scenario, we are working to increase the duty cycle under the same beam current until CW operation. Thus, the compensation control of the dissipation for RF devices during beam commissioning is one of the core challenges in our project. Recently, we have struggled with many problems with current circulators, such as mismatches of resonances and demagnetization of magnets due to the coil heating. To solve fundamental parts of the previous design, we procured new circulators of the revised model. In the report, we summarize the test results and the analysis with comparisons between existing and new circulators, and the next plans.