The superconducting magnet system for the J-PARC neutrino beam line for the T2K experiment has been served for the beam operation without serious disturbance since April 2009. Present most concern of the system is the operational current limit of superconducting corrector magnets for beam steering dueto systematic quenches at lower currents. Operational experience of the magnet system and examples of troubleshoot including countermeasures against the corrector magnet quenches are presented.
- Beam line
- Superconducting magnet