| Paper | Title | Page |
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| WEPRI072 | High Power Co-axial Couplers for SRF Cavities | 2657 |
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Funding: Work supported by Dept. of Energy grant no. DE-SC0002769 High Power RF couplers are required in a wide range of accelerator projects using superconducting RF cavities. We have proposed a novel robust coax SRF coupler design using two pre-stressed disc windows without the need of additional matching elements. The matching frequency and the power handling capacity can be easily scaled by changing the diameter and the spacing of the windows. In this paper, we will present our latest progress in the fabrication and the testing of the windows. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI072 | |
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| WEPRI073 | High Order Modes Survey and Mitigation of the CEBAF C100 Cryomodules | 2660 |
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Funding: Funding Agency: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177 Ten new C100 cryomodules have been installed for the CEBAF 12GeV upgrade in the last few years. The high order modes (HOM) of these cryomodules need to be controlled to avoid beam breakup (BBU) instability. We surveyed the HOM for all the 80 cavities of the C100 modules in both the JLab cryomodule test facility (CMTF) and the CEBAF tunnel. Additional measures such as waveguide filters were applied to bring down out of spec modes. In this paper, we will present the HOM survey setup and results. The mitigation measures and their effects will also be discussed. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI073 | |
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| THPRI080 | The New Design for Capture Cavity of CEBAF | 3955 |
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| In CEBAF, the electron beam from the injector must be sufficiently relativistic to match a 1 GeV recirculated beam in the first linac. The electron beam is produced with a ~130 keV electron gun, then accelerated by a room temperature, graded-beta standing wave linac, capture section, from 130 keV to 510 keV before enters two 5-cell superconducting RF cavities for further acceleration. Present capture cavity is a 5-cell side-coupled cavity. We designed a new slot-coupled cavity which has lower power consumption and simpler structure. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI080 | |
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