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High gradient testing of an X-band crab cavity at XBOX2

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Abstract

CERN’s Compact linear collider (CLIC) will require crab cavities to align the bunches to provide effective head-on collisions. An X-band quasi-TM11 deflecting cavity has been designed and manufactured for testing at CERN’s Xbox-2 high power standalone test stand.
The cavity is currently under test and has reached an input power level in excess of 40MW, with a measured breakdown rate of better than 10-5 breakdowns per pulse.
This paper also describes surface field quantities which are important in assessing the expected BDR when designing high gradient structures.

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© 2015 CC-BY-3.0 and by the respective authors