Phys. Rev. ST Accel. Beams 9, 103501 (2006) [13 pages]Design study of a movable mask with low beam impedance
Y. Suetsugu1, K. Shibata1, A. Morishige2, Y. Suzuki2, and M. Tsuchiya2 Received 12 October 2006; published 31 October 2006 A novel design of a movable mask (collimator) for high-current accelerators is proposed. The mask head is supported by a ceramic rod to reduce interference with the beam. One side of the support is coated with a thin (∼1 μm) conductive material to avoid extra charge up of the head. The head is also made of ceramics to avoid direct damage from an intense beam. To investigate the availability of the new movable mask, the rf properties, such as the impedances of trapped modes and the loss factors, were evaluated by simulation codes. The frequencies and the Q values of the trapped modes were also measured using a test model, and compared with calculated ones. Two trial modes for KEKB are being manufactured, and will be tested with beams next year. ©2006 The American Physical Society
URL: http://link.aps.org/abstract/PRSTAB/v9/e103501 [ Abstract | Previous article | Next article | Issue 10 ] |
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