Status of Superconducting Magnet System for J-PARC Neutrino Beam Line

Author

Ogitsu, T. ; Makida, Yasuhiro ; Nakamoto, Takamichi ; Sasaki, Kazuhiko ; Araoka, O. ; Fujii, Yuka ; Iida, Michihisa ; Ishii, Takuro ; Iwasaki, Ruri ; Kimura, N. ; Kobayashi, Takehiko ; Nakadaira, T. ; Nakayoshi, K. ; Ohhata, H. ; Okamura, Takahiro ; Okada

Author_Institution

KEK, High Energy Accel. Res. Organ., Naka, Japan

Volume

23

Issue

3

fYear

2013

fDate

41426

Firstpage

4001506

Lastpage

4001506

Abstract

The Great East Japan earthquake that occurred on March 11, 2011 resulted in devastating damages to J-PARC. Although damages to the superconducting magnet system for the J-PARC neutrino beam line appeared to be relatively small, a long recovery procedure was required to resume the operation. Except for this long shutdown period, the system has been operated stably ensuring good accumulation of the physics data. The paper reports on the operation status including the damages by the earthquake and its recovery process. Repair of the insufficient cooling of steering corrector coils, which was present prior to the earthquake, was also performed during the recovery process. The paper also reports on the repair.

Keywords

maintenance engineering; superconducting magnets; J-PARC neutrino beam line; earthquake; operation status; physics data accumulation; recovery procedure; recovery process; steering corrector coil cooling; superconducting magnet system status; Coils; Earthquakes; Helium; Magnetic noise; Magnetic tunneling; Structural beams; Superconducting magnets; Beam line; combined function magnet; neutrino; superconducting magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2234821

Filename

6387290