Superconducting Magnet Design for the Hyperfine Structure Measurement of Muonium at the J-PARC

Author

Sasaki, Kazuhiko ; Sugano, M. ; Ohkubo, Ryoko ; Ogitsu, T. ; Saito, Nobuo ; Shimomura, Kazuya ; Yamamoto, Akiyasu

Author_Institution

High Energy Accel. Res. Organ. (KEK), Tsukuba, Japan

Volume

23

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

4500704

Lastpage

4500704

Abstract

A superconducting magnet system for a new muonium hyperfine structure, MuHFS, measurement at J-PARC is being developed. This experiment requires a magnetic field strength of 1.7 T with high homogeneity below 1 ppm. The overall mechanical design including helium and vacuum vessels was almost completed. In order to evaluate the influence of coil vibration on the error field, the modal analysis was performed. The conceptual design of superconducting shim coils was carried out. The zonal and radial shim coils were designed by using the conventional spherical harmonics method and the singular value decomposition method, respectively.

Keywords

error analysis; hyperfine structure; modal analysis; muonium; shims; singular value decomposition; superconducting coils; superconducting magnets; J-PARC; coil vibration; error field; helium vessel; homogeneity; magnetic field strength; modal analysis; muonium hyperfine structure measurement; overall mechanical design; radial shim coil; singular value decomposition method; spherical harmonics method; superconducting magnet design; superconducting magnet system; superconducting shim coil design; vacuum vessel; zonal shim coil; Coils; Magnetic noise; Magnetic resonance; Magnetic shielding; Superconducting magnets; Vibrations; Windings; Hyperfine transition; J-PARC; muonium; superconducting shim coil; superconducting solenoid;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2245714

Filename

6451158