* * (acc) 'i " Superconducting Niobium Cavit+ Measurements at Slac*
نویسنده
چکیده
The program of measurements at SLAC on superconduct. I ;r. ing niobium cavities is described. Results for TE and TM mode X-band cavities are presented. An RF magnetic breskdown field of 960 gauss and Q values greater than 1011 were measured for an electron beam welded TEOII mode cavity at ‘I 10.5 GHz. The best result for a TM mode cavity was a Q of 1.4 x log and a breakdown field of 360 gauss, limited probably by the quality of the electron beam weld. Data on the effect of exposure to air and to nitrogen are presented. ,:
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