Title :
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
fDate :
6/1/2009 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2017943
