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Title	High-Power Test of an APF IH-DTL Prototype for the Muon Linac
Authors	Y. Nakazawa, H. Iinuma Ibaraki University, Ibaraki, Japan E. Cicek, H. Ego, K. Futatsukawa, N. Kawamura, T. Mibe, S. Mizobata, N. Saito, M. Yoshida KEK, Ibaraki, Japan N. Hayashizaki Research Laboratory for Nuclear Research, Tokyo Institute of Technology, Tokyo, Japan Y. Iwata NIRS, Chiba-shi, Japan R. Kitamura, Y. Kondo, T. Morishita JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan M. Otani J-PARC, KEK & JAEA, Ibaraki-ken, Japan Y. Sue, K. Sumi, M. Yotsuzuka Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan Y. Takeuchi Kyushu University, Fukuoka, Japan T. Yamazaki KEK, Tokai Branch, Tokai, Naka, Ibaraki, Japan H.Y. Yasuda University of Tokyo, Tokyo, Japan
Abstract	A muon linac is under development for a new muon g-2/EDM experiment at J-PARC. The muons are cooled to about room temperature and then re-accelerated to 212 MeV by four linear accelerators to produce a low-emittance muon beam. In the low-beta section, a short-range acceleration cavity with high efficiency needs to be developed to suppress the decay of muons. We propose a 324 MHz inter-digital H-mode drift-tube linac (IH-DTL) with high acceleration efficiency. The cavity can be downsized by introducing the alternating phase focusing (APF) method that provides transverse focusing only with an E-field. We have developed a prototype cavity that accelerates muons up to 1.3 MeV to demonstrate the principle. In this paper, the result of the high power test of the APF IH-DTL prototype is reported.
Paper	download MOPORI22.PDF [1.933 MB / 4 pages]
Poster	download MOPORI22_POSTER.PDF [10.978 MB]
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Conference	LINAC2022
Series	International Linear Accelerator Conference (31st)
Location	Liverpool, UK
Date	28 August-02 September 2022
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Peter McIntosh (STFC DL, Daresbury, UK); Graeme Burt (Lancaster Univ., Lancaster, UK); Robert Apsimon (Lancaster Univ., Lancaster, UK); Volker R.W. Schaa (GSI, Darmstadt, Germany)
Online ISBN	978-3-95450-215-8
Online ISSN	2226-0366
Received	13 August 2022
Revised	16 August 2022
Accepted	28 August 2022
Issue Date	01 September 2022
DOI	doi:10.18429/JACoW-LINAC2022-MOPORI22
Pages	275-278
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.