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First high gradient test results of a dressed 325 MHz superconducting single spoke resonator at Fermilab

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arxiv 1202.1551 v1 pith:XD3J6ZHL submitted 2012-02-07 physics.acc-ph

First high gradient test results of a dressed 325 MHz superconducting single spoke resonator at Fermilab

classification physics.acc-ph
keywords cavityresultssuperconductingdressedfacilityfermilabfirstgradient
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A new superconducting RF cavity test facility has been commissioned at Fermilab in conjunction with first tests of a 325 MHz, {\beta} = 0.22 superconducting single-spoke cavity dressed with a helium jacket and prototype tuner. The facility is described and results of full gradient, CW cavity tests with a high Qext drive coupler are reported. Sensitivities to Q disease and externally applied magnetic fields were investigated. Results are compared to bare cavity results obtained prior to hydrogen degassing and welding into the helium jacket.

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