WEP4631

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URL	https://doi.org/10.18429/JACoW-IPAC2026-WEP4631
Title	Low-power test of bridge coupler connected to tank in disk-and-washer structure for muon acceleration
Authors	A. Kondo, T. Iijima, K. Sumi Nagoya University Y. Takeuchi Shanghai Jiao Tong University E. Cicek, H. Ego, M. Otani, Y. Nakazawa, K. Futatsukawa, T. Mibe, M. Yoshida High Energy Accelerator Research Organization Y. Kondo, M. Takatoshi Japan Atomic Energy Agency Y. Iwashita The University of Osaka
Abstract	A muon linear accelerator is under development at J-PARC for precise measurement of the muon anomalous magnetic moment (g-2) and search for the electric dipole moment (EDM). The disk-and-washer (DAW) structure is employed to accelerate muons from 30% of the speed of light (kinetic energy = 4 MeV) to 70% (40 MeV) at 1296 MHz. The muon DAW consists of tanks accelerating the muons and bridge couplers that couple the tanks and focus the beam using an internal quadrupole doublet. A bridge coupler prototype was fabricated and tested at low power. This Low-power test focused on measuring resonant frequencies, Q-value, and electric field distribution. Furthermore, the bridge coupler prototype was connected to a tank prototype and tested at low power to understand the effects of the connection. This paper summarizes these results and discusses the prospects for actual machine production.
Paper	download: WEP4631.pdf
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Conference	17th International Particle Accelerator Conference
Series
Location	Deauville, France
Date	17-22 May 2026
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Editorial Board
Online ISBN	978-3-95450-252-3
Online ISSN	2673-5350
Received	01 April 2026
Revised	29 April 2026
Accepted	14 May 2026
Issued	20 July 2026
DOI	10.18429/JACoW-IPAC2026-WEP4631
Pages	2779-2782
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.