Performance of a superconducting magnet system operated in the Super Omega Muon beam line at J-PARC

A superconducting magnet system, which is composed of an 8 m long solenoid for transportation and 12 short solenoids for focusing, has been developed for Muon Science Establishment facility of J-PARC. The transport solenoid is composed of a 6 m straight section connected to a 45 degree curved sectio...

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Bibliographic Details
Main Authors: Makida Yasuhiro, Ikedo Yutaka, Ogitsu Toru, Shimomura Koichiro, Miyake Yasuhiro, Yoshida Makoto, Adachi Taihei, Kadono Ryosuke, Kawamura Naritoshi, Strasser Patric, Koda Akihiro, Fujimori, Hiroshi, Nishiyama Kusuo, Ohhata Hirokatsu, Okamura Takahiro, Okada Ryutaro, Orikasa Tomofumi
Format: Conference Proceeding
Language:English
Subjects:
Boring
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Coils
COMMISSIONING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CHARGES
MAGNETIC FIELDS
Magnetism
MUON BEAMS
MUONS
PARTICLE ACCELERATORS
Particle beams
Proton accelerators
SOLENOIDS
SUPERCONDUCTING MAGNETS
Superconductivity
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Summary:A superconducting magnet system, which is composed of an 8 m long solenoid for transportation and 12 short solenoids for focusing, has been developed for Muon Science Establishment facility of J-PARC. The transport solenoid is composed of a 6 m straight section connected to a 45 degree curved section at each end. Muons of various momenta and of both electric charges are transported through the solenoid inner bore with an effective diameter of 0.3 m, where 2 T magnetic field is induced. There are 12 focusing solenoids with an effective bore diameter of 0.6 m and a length of 0.35 m arranged on a straight line at suitable intervals. The maximum central field of each focusing solenoid is 0.66 T. All solenoid coils are cooled by GM cryocoolers through their own conductions. The magnet system has been installed into the beam line in the summer of 2012, and its performance has been checked. Beam commissioning has been carried out since October 2012. During beam operation, temperature rise over 6 K in the transport solenoid due to a nuclear heating from the muon production target is observed at beam intensity of about 300 kW.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4860734