Recent Results on 500 MHz Superconducting Cavities at KEK
- 1 February 1982
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 21 (2A) , L86
- https://doi.org/10.1143/jjap.21.l86
Abstract
Two 500 MHz spherical cavities built from Nb were tested. Locations of weak spots at breakdown field levels were detected and surface processing was repeated to remove the weak spots. Q 0 and the accelerating field gradient were improved after each reprocessing.Q 0=4.1–4.2×109 and E acc=6.5 MV/m at 4.2 K, Q 0=3.2–4.8×1010 and E acc=7.0 MV/m at 1.8 K were obtained for both cavities.Keywords
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