Test Results of Superconducting Magnets for the J-PARC Neutrino Beam Line

Author

Okamura, Takahiro ; Sasaki, Ken-Ichi ; Tomaru, Takayuki ; Ajima, Yasuo ; Ogitsu, Toru ; Kimura, Nobuhiro ; Iida, Masahisa ; Ohhata, Hirokatsu ; Sugawara, Shigekatsu ; Tanaka, Ken-Ichi ; Nakamoto, Tatsushi ; Higashi, Norio ; Makida, Yasuhiro ; Araoka, Osam

Author_Institution

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

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1125

Lastpage

1130

Abstract

Fabrication and cold tests of 32 superconducting combined function magnets including 4 backup magnets for the J-PARC neutrino have been completed. All the magnets reached 7700 A, 105% of maximum operation current, without any spontaneous quenches. Quench protection performance was also confirmed to be safe. In the field measurement during cold tests, all the magnets showed sufficient field quality to fulfill the specification. Reproducibility of the field quality was evaluated to be about the same order of that observed in ordinary cos-thetas magnets, indicating good manufacturing reproducibility.

Keywords

beam handling equipment; particle beam extraction; proton accelerators; proton beams; superconducting magnets; J-PARC; combined function; current 7700 A; neutrino beam line; operation current; proton accelerator; proton beam extraction; quench protection; superconducting magnets; J-PARC; neutrino; superconducting combined function magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2017943

Filename

4982603