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| TUPKF010 |
Cryogenic Considerations for CW Operation of TESLA-type Superconducting Cavity Modules for the BESSY FEL
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976 |
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- J. Knobloch, W. Anders, X. Yu
BESSY GmbH, Berlin
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The proposed BESSY FEL uses a CW superconducting driver linac to provide acceleration up to 2.3 GeV. Its design is based on well-established TESLA technology, originally intended for heat loads of order 1 W/m at 2.0 K. CW operation increases this load to levels of order 15 W/m at 1.8 K for a total heat load of 3 kW at 2.3 GeV (given conservative assumptions for the attainable Q-factor). Presented here is an analysis of the cryogenic layout, including two-phase-flow simulations of the 1.8-K helium which help identify the changes needed for reliable CW operation. A modified ‘‘CW'' module and helium distribution scheme is proposed.
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