%0 Journal Article
%T High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology
%A Millar, W. L. et al
%A Bañon Caballero, D.
%J IEEE Transactions on Nuclear Science
%D 2023
%V 70
%N 1
%I Ieee-Inst Electrical Electronics Engineers Inc
%@ 0018-9499
%G English
%F Millar+BanonCaballero2023
%O WOS:000920658600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5471), last updated on Mon, 27 Feb 2023 10:28:52 +0000
%X This article presents the design, construction, and high-power test of two $X$ -band radio frequency (RF) accelerating structures built as part of a collaboration between CERN and the Paul Scherrer Institute (PSI) for the compact linear collider (CLIC) study. The structures are a modified "tuning-free " variant of an existing CERN design and were assembled using Swiss free electron laser (SwissFEL) production methods. The purpose of the study is two-fold. The first objective is to validate the RF properties and high-power performance of the tuning-free, vacuum brazed PSI technology. The second objective is to study the structures' high-gradient behavior to provide insight into the breakdown and conditioning phenomena as they apply to high-field devices in general. Low-power RF measurements showed that the structure field profiles were close to the design values, and both structures were conditioned to accelerating gradients in excess of 100 MV/m in CERN's high-gradient test facility. Measurements performed during the second structure test suggest that the breakdown rate (BDR) scales strongly with the accelerating gradient, with the best fit being a power law relation with an exponent of 31.14. In both cases, the test results indicate that stable, high-gradient operation is possible with tuning-free, vacuum brazed structures of this kind.
%K Radio frequency
%K Life estimation
%K Temperature measurement
%K Wires
%K Electric breakdown
%K Brazing
%K Rendering (computer graphics)
%K Acceleration
%K breakdown
%K high gradient
%K linear accelerator cavity (LINAC)
%K radio frequency (RF)
%K test facilities
%K vacuum arc
%K X-band
%R 10.1109/TNS.2022.3230567
%U https://doi.org/10.1109/TNS.2022.3230567
%P 1-19