| Paper | Title | Page |
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| WEPMN055 | PEFP HOM Coupler Design | 2161 |
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Funding: This work was supported by the 21C Frontier R&D program of Korea Ministry of Science and Technology. A new type of coaxial higher-order mode (HOM) coupler with one hook and two stubs has been designed for PEFP SRF cavities to satisfy the HOM damping requirements of the superconducting RF (SRF) linac of the Proton Engineering Frontier Project (PEFP), and to overcome the notch frequency shift and feed-through tip melting issues. This paper has presents details on the PEFP HOM coupler?s structure, structure optimization, filter characteristics, electro-magnetic field distribution and a coupler installation tool. |
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| WEPMN056 | PEFP Low-beta SRF Cavity Design | 2164 |
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Funding: This work was supported by the 21C Frontier R&D program of Korea Ministry of Science and Technology. An elliptical superconducting RF cavity of 700 MHz with βg=0.42 has been designed for the Linac of Proton Engineering Frontier Project (PEFP). A double-ring stiffening structure is used for a low-beta cavity for a Lorentz force detuning. The results of the electron multipacting analysis of the cavity are presented. A HOM analysis shows that the HOM coupler's Qext is lower than 3·10+5, thus reducing the influence of dangerous modes on the beam instabilities and the HOM-induced power. |