Title :
Superconducting magnet system at the 50 GeV proton beam line for the J-PARC neutrino experiment
Author :
Ogitsu, Toru ; Makida, Yasuhiro ; Kobayashi, Takashi ; Ajima, Yasuo ; Doi, Yoshikuni ; Higashi, Norio ; Iwamoto, Yosuke ; Ichikawa, Atsuko ; Kimura, Nobuhiro ; Nakamoto, Tatsushi ; Ohhata, Hirokatsu ; Shintomi, Takakazu ; Takasaki, Minoru ; Tanaka, Ken-Ic
Author_Institution :
High Energy Accelerator Res. Organ., KEK, Ibaraki, Japan
fDate :
6/1/2004 12:00:00 AM
Abstract :
A neutrino oscillation experiment using the J-PARC 50 GeV 0.75 MW proton beam is planned as a successor to the K2K project currently being operated at KEK. A superconducting magnet system is required for the arc section of the primary proton beam line to be within the space available at the site. A system with 28 combined function magnets is proposed to simplify the system and optimize the cost. The required fields for the magnets are 2.6 T dipole and 19 T/m quadrupole. The magnets are also required to have a large aperture, 173.4 mm diameter, to accommodate the large beam emittance. The magnets will be protected by cold diodes and cooled by forced flow supercritical helium produced by a 4.5 K, 2∼2.5 kW refrigerator. This paper reports the system overview and the design status.
Keywords :
beam handling equipment; neutrino oscillations; proton beams; superconducting magnets; 0.75 MW; 173.4 mm; 2.6 T; 4.5 K; 50 GeV; J-PARC neutrino experiment; cold diodes; combined function magnet; proton beam line; superconducting magnet system; supercritical helium; Cost function; Diodes; Helium; Neutrino sources; Optical design; Particle beams; Protection; Refrigeration; Superconducting coils; Superconducting magnets; Beam line; combined function magnet; neutrino; superconducting magnet;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830011
