Title :
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
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2013.2245714
