CST – Computer Simulation Technology

Title:
Prediction of multipactor in the iris region of rf deflecting mode cavities
Author(s):
G. Burt, A. C. Dexter
Source:
PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS
Vol./Issue/Date:
Volume: 14, Issue: 12, 4 October 2011
Year:
2011
Page(s):
122002-1 - 122002-11
Abstract:
Multipactor is a major cause of field limitation in many superconducting rf cavities. Multipacting is a particular issue for deflecting mode cavities as the typical behavior is not well studied, understood, or parametrized. In this paper an approximate analytical model for the prediction of multipactor in the irisregion of deflecting mode cavities is developed. This new but simple model yields a clear explanation on the broad range of rf field levels over which the multipactor can occur. The principle multipactors under investigation here are two-point multipactors associated with cyclotron motion in the cavity’s rf magnetic field. The predictions from the model are compared to numerical simulations and good agreement is obtained. The results are also compared to experimental results previously reported by KEK and are also found in good agreement.
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