Comparison of the conditioning of high gradient accelerating structures

Accelerating gradients in excess of 100MV/m , at very low breakdown rates, have been successfully achieved in numerous prototype CLIC accelerating structures. The conditioning and operational histories of several structures, tested at KEK and CERN, have been compared and there is clear evidence that...

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Bibliographic Details
Published inPhysical review. Accelerators and beams Vol. 19; no. 3; p. 032001
Main Authors Degiovanni, Alberto, Wuensch, Walter, Giner Navarro, Jorge
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 01.03.2016
Subjects
Breakdown
Conditioning
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Summary:Accelerating gradients in excess of 100MV/m , at very low breakdown rates, have been successfully achieved in numerous prototype CLIC accelerating structures. The conditioning and operational histories of several structures, tested at KEK and CERN, have been compared and there is clear evidence that the conditioning progresses with the number of rf pulses and not with the number of breakdowns. This observation opens the possibility that the optimum conditioning strategy, which minimizes the total number of breakdowns the structure is subject to without increasing conditioning time, may be to never exceed the breakdown rate target for operation. The result is also likely to have a strong impact on efforts to understand the physical mechanism underlying conditioning and may lead to preparation procedures which reduce conditioning time.
ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.19.032001