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TY - CONF
AU - Freemire, B.T.
AU - Conde, M.E.
AU - Doran, D.S.
AU - Ha, G.
AU - Jing, C.-J.
AU - Liu, W.
AU - Peng, M.M.
AU - Poddar, S.
AU - Power, J.G.
AU - Shao, J.H.
AU - Whiteford, C.
AU - Wisniewski, E.E.
AU - Zhao, Y.
ED - Liu, Lin
ED - Byrd, John M.
ED - Neuenschwander, Regis T.
ED - Picoreti, Renan
ED - Schaa, Volker R. W.
TI - High Power Test of a Dielectric Disk Loaded Accelerator for a Two Beam Wakefield Accelerator
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 - As part of the Argonne 500 MeV short pulse Two Beam Wakefield Acceleration Demonstrator, a single cell X-band dielectric disk loaded accelerator (DDA) has been designed, fabricated, and tested at high power at the Argonne Wakefield Accelerator. The DDA should provide a short pulse (~20 ns) high gradient (>300 MV/m) accelerator while maintaining a reasonable r/Q and high group velocity. This will allow a significantly larger RF-to-beam efficiency than is currently possible for conventional accelerating structures. A low loss barium titantate ceramic, µ_{r} = 50, was selected, and a low temperature brazing alloy chosen to preserve the dielectric properties of the ceramic during brazing. High power testing produced breakdown at the triple junction, resulting from the braze joint design. No evidence of breakdown was observed on the iris of the disk, indicating that the maximum surface electric field on the dielectric was not reached. An improved braze joint has been designed and is in production, with high power testing to follow.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 1096
EP - 1099
KW - wakefield
KW - acceleration
KW - impedance
KW - linear-collider
KW - multipactoring
DA - 2021/08
PY - 2021
SN - 2673-5490
SN - 978-3-95450-214-1
DO - doi:10.18429/JACoW-IPAC2021-MOPAB352
UR - https://jacow.org/ipac2021/papers/mopab352.pdf
ER -