TUCOYBS01
KEK, Ibaraki, Japan
QST, Tokai, Japan
KEK, Ibaraki, Japan
| Paper | Title | Page |
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TUCOYBS01 |
KEK ERL SRF Operation Experience | |
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| We will present the SRF operation experience during long-term cERL operation in KEK. | ||
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Slides TUCOYBS01 [8.289 MB] | |
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| THCOXBS02 | Development of HOM Coupler with C-Shaped Waveguide for ERL Operation | 138 |
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| HOM damping in the superconducting cavities has been becoming increasingly important for high current beam acceleration. Though some HOM damping devices have already been used with success at moderate currents, they have some inherent disadvantages for high current in principle. We have proposed the new type of the HOM coupler using the C-shaped wave guide (CSWG). The CSWG is structured by topologically transforming a rectangular waveguide into coaxial-like structure whose inner and outer conductors are connected with a plate. Similar to the rectangular waveguide, the CSWG has cutoff frequency whose half wave length is approximately equal to the mean circumference. This enables a smaller low-pass filter than the rectangular waveguide. Since the inner conductor can be easily cooled through the plate and the outer conductor, this prevents the connector for HOM power extraction from temperature rising. These characteristics of the CSWG-type HOM coupler can solve the disadvantages of the conventional damping devices. The properties of sufficient HOM damping were confirmed by the measurements with the CSWG-type HOM couplers equipped to the cavity models. | ||
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Slides THCOXBS02 [7.418 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-THCOXBS02 | |
| About • | paper received ※ 13 September 2019 paper accepted ※ 01 November 2019 issue date ※ 24 June 2020 | |
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