WEOB2 　ハドロン加速器　 8月30日 13号館1326教室 9:20-9:40

High power continuous wave test of RF couplers for the RFQ of the Linear IFMIF Prototype Accelerator

High power continuous wave test of RF couplers for the RFQ of the Linear IFMIF Prototype Accelerator

○De Franco Andrea（国立研究開発法人量子科学技術研究開発機構 (QST)），Caballero Cesar（University of Granada），Garcia Juan Manuel（CIEMAT），Gex Dominique（Fusion for Energy (F4E)），Gonzalez-Gallego Luis（University of Granada），廣澤 航輝，石村 光広，金子 尚美，近藤 恵太郎，久保 直也（国立研究開発法人量子科学技術研究開発機構 (QST)），Maindive Lucas（University of Granada），増田 開（国立研究開発法人量子科学技術研究開発機構 (QST)），Morales Juan Carlos（University of Granada），Moya Ivan（Fusion for Energy (F4E)），中山 尚英，成田 隆宏（国立研究開発法人量子科学技術研究開発機構 (QST)），Scantamburlo Francesco（Fusion for Energy (F4E)），杉本 昌義，柳町 太亮（国立研究開発法人量子科学技術研究開発機構 (QST)）

○Andrea De Franco (National Institutes for Quantum Science and Technology (QST)), Cesar Caballero (University of Granada), Juan Manuel Garcia (CIEMAT), Dominique Gex (Fusion for Energy (F4E)), Luis Gonzalez-gallego (University of Granada), Kouki Hirosawa, Kouhiro Ishimura, Naomi Kaneko, Keitaro Kondo, Naoya Kubo (National Institutes for Quantum Science and Technology (QST)), Lucas Maindive (Maindive), Kai Masuda (National Institutes for Quantum Science and Technology (QST)), Juan Carlos Morales (University of Granada), Ivan Moya (Fusion for Energy (F4E)), Takahide Nakayama, Takahiro Narita (National Institutes for Quantum Science and Technology (QST)), Francesco Scantamburlo (Fusion for Energy (F4E)), Masayoshi Sugimoto, Taisuke Yanagimachi (National Institutes for Quantum Science and Technology (QST))

The International Fusion Materials Irradiation Facility (IFMIF) is an accelerator-based high flux neutron source designed to test future fusion reactors materials. The Linear IFMIF Prototype Accelerator (LIPAc) is designed to validate key components for IFMIF-like accelerators. LIPAc is designed to accelerate 125 mA D+ beams to 9 MeV in Continuous Wave (CW) with an Electron Cyclotron Resonance ion source (100 keV) and RFQ (5 MeV), a yet-to-be-installed SRF Linac, matching sections, and a beam dump. The RFQ requires 175 MHz RF input of up to 160 kW in CW from each of its 8 ports. During the RF conditioning of the cavity at high duty cycle, the RF coupler’s elastomers and alumina vacuum windows experienced damages. A second set of RF couplers has been designed and tested at low power with a high Q load circuit in 2016. In this work, we report the recent high-power tests (200 kW CW) of two couplers with a bridge cavity. We describe the setup, report results and the challenges encountered including severe multipacting in the bridge cavity. To conclude, we present an outlook of future tests.