TY  - JOUR
AU  - Millar, W. L. et al
AU  - Bañon Caballero, D.
PY  - 2023
DA  - 2023//
TI  - High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology
T2  - IEEE Trans. Nucl. Sci.
JO  - IEEE Transactions on Nuclear Science
SP  - 1
EP  - 19
VL  - 70
IS  - 1
PB  - Ieee-Inst Electrical Electronics Engineers Inc
KW  - Radio frequency
KW  - Life estimation
KW  - Temperature measurement
KW  - Wires
KW  - Electric breakdown
KW  - Brazing
KW  - Rendering (computer graphics)
KW  - Acceleration
KW  - breakdown
KW  - high gradient
KW  - linear accelerator cavity (LINAC)
KW  - radio frequency (RF)
KW  - test facilities
KW  - vacuum arc
KW  - X-band
AB  - 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.
SN  - 0018-9499
UR  - https://doi.org/10.1109/TNS.2022.3230567
DO  - 10.1109/TNS.2022.3230567
LA  - English
N1  - WOS:000920658600001
ID  - Millar+BanonCaballero2023
ER  -