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LCLS-II and HE Cryomodule Microphonics at CMTF in Fermilab*

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arxiv 2208.06316 v1 pith:JJNIZABS submitted 2022-08-12 physics.acc-ph

C. Contreras-Martinez , E. Harms , C. Cravatta , J. Holzbauer , S. Posen , L. Doolittle , B. Chase , J. Einstein-Curtis
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J. Makara R. Wang
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classification physics.acc-ph
keywords cryomoduledetuninglcls-iimicrophonicscmtfdatatakencapture
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Microphonics causes the cavity to detune. This study discusses the microphonics of sixteen 1.3 GHz cryomodules, 14 for LCLS-II and 2 for LCLS-II HE tested at CMTF. The peak detuning, as well as the RMS detuning for each cryomodule, will be discussed. For each cryomodule, the data was taken with enough soaking time to prevent any thermalization effects which can show up in the detuning. Each data capture taken was 30 minutes or longer and sampled at 1 kHz.

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