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A split high‐Q superconducting cavity

We describe the construction of a 35‐GHz split high‐Q superconducting cavity operating in the TM010 mode. The cavity is tuned by varying the spacing between the halves. Radiation loss from this gap is suppressed by a choke groove. Q=4×107 has been achieved in both lead‐plated copper and niobium cavi...

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Bibliographic Details
Published in:Review of scientific instruments 1990-07, Vol.61 (7), p.1940-1945
Main Authors: Hughey, Barbara J., Gentile, Thomas R., Kleppner, Daniel, Ducas, Theodore W.
Format: Article
Language:English
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Summary:We describe the construction of a 35‐GHz split high‐Q superconducting cavity operating in the TM010 mode. The cavity is tuned by varying the spacing between the halves. Radiation loss from this gap is suppressed by a choke groove. Q=4×107 has been achieved in both lead‐plated copper and niobium cavities at a temperature of 2 K. Q>107 can be maintained over a 300‐MHz tuning range, corresponding to a gap between the halves of 85 μm.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1141119