| Paper | Title | Page |
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| WG3003 | HOM Properties of Main Linac for cERL in Japan | 87 |
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| Two types of HOM absorber models were designed and fabricated. One type was almost actual shape except for HIP ferrite. The other was the center part of HOM absorber where ferrite was HIPped. Both models were used to estimate the cooling properties such as thermal conductivity and thermal cycle tolerance. The model with ferrite was also used to estimate the HOM absorption installing to the 9-cell cavity at the room temperature. The measured results will be presented. | ||
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Slides WG3003 [2.204 MB] | |
| WG3006 | Development of Input Coupler for Compact ERL Main Linac | 91 |
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| We fabricated the prototype of an input coupler, which has two ceramic windows to keep the inside of the superconducting cavity clean, for ERL main linac and performed the high power test. Required input power is about 20kW with standing wave condition for the cavity acceleration field of 20MV/m. In this high power test, the one ceramic window, named as a cold window, was installed into the vacuum insulating chamber and cooled by liquid Nitrogen. First, the multipacting at 10kW level prevented the power increasing. By using the pulse processing method for 8 hours, power finally reached the 25kW with standing wave condition. We could also keep feeding 20kW power into coupler for 16 hours. From these results of high power test, this prototype coupler satisfied our thermal and RF requirements. | ||
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Slides WG3006 [5.352 MB] | |
WG3043 |
Vertical Test Diagnostics and Simulation Studies for 9-cell cERL Cavities | |
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Slides WG3043 [2.351 MB] | |