Thursday, December 4, 2008, 10:00 am — NSLS-II Seminar Room, Bldg. 817
Although the ILC uses predominately superconducting cavities, the positron capture cavity location in both a high radiation environment and a solenoidal magnetic field requires it to be normal conducting. A 5-cell, normal-conducting, 1.3 GHz, standing-wave (SW) cavity was built as a prototype capture accelerator for the ILC positron source. During the high power test of the cavity, two type of breakdown events (hard event and soft event) have been found. In order to understand the two type of breakdown and locate the breakdown position, an equivalent circuit model is established. The result is that the breakdowns are isolating various numbers of cavity cells, thus the stored energy in the isolated cavity will decay in some of the natural modes of this part, which will have behavior as modes beating, and is efficiently confirmed with the circuit model.
Hosted by: James Rose
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