Development of a high gradient rf system using a nanocrystalline soft magnetic alloy

Chihiro Ohmori,* Eizi Ezura, Keigo Hara, Katsushi Hasegawa, Yasuhiro Makida, Ryotaro Muto, Masahiro Nomura, Toru Ogitsu, Taihei Shimada, Alexander Schnase, Koji Takata, Akira Takagi, Fumihiko Tamura, Kazuhiro Tanaka, Makoto Toda, Masanobu Yamamoto, and Masahito Yoshii J-PARC Center, KEK and JAEA, 2-4 Shirakata-Shirane, Tokai, Naka, Ibaraki, Japan 319-1195 (Received 3 October 2013; published 18 November 2013)