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TY - CONF AU - Wu, X.W. AU - Boronat, M. AU - Castilla, A. AU - Catalán Lasheras, N. AU - Edwards, A.V. AU - Grudiev, A. AU - McMonagle, G. AU - Millar, W.L. AU - Syratchev, I. AU - Wuensch, W. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - High-Gradient Breakdown Studies of an X-Band Accelerating Structure Operated in the Reversed Taper Direction J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - The results of high-gradient tests of a tapered X-band traveling-wave accelerator structure powered in reversed direction are presented. Powering the tapered structure from the small aperture, normally output, at the end of the structure provides unique conditions for the study of gradient limits. This allows high fields in the first cell for a comparatively low input power and a field distribution that rapidly falls off along the length of the structure. A maximum gradient of 130 MV/m in the first cell at a pulse length of 100 ns was reached for an input power of 31.9 MW. Details of the conditioning and operation at high-gradient are presented. Various breakdown rate measurements were conducted at different power levels and rf pulse widths. The structure was standard T24 CLIC test structure and was tested in Xbox-3 at CERN. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1543 EP - 1546 KW - linac KW - accelerating-gradient KW - linear-collider KW - klystron KW - collider DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-TUPAB076 UR - https://jacow.org/ipac2021/papers/tupab076.pdf ER -