Current status of the kicker magnet power supply in 3-GeV RCS

The J-PARC (Japan Proton Accelerator Research Complex) 3-GeV RCS (Rapid Cycling Synchrotron) has the pulse kicker power supply system which uses the thyratron switch for beam extraction. The power supply system has been used for more than 10 years. However the power supply is continuing the stable operation by carrying out the exchange of the regular maintenance and consumables. Furthermore, the thyratron switch has become possible use of more than an average of 10,000 hours by establishing a maintenance technique with many years of experience. On the other hand, the consumables will be discontinuing and the selection of the substitution product becomes a pending problem. Deterioration of the silicon oil has been progressed, and the recovery method of a performance and the consideration of a replacement procedure. This report explains the current state of the kicker magnet power supply system from the results of the regular maintenance and operation conditions. (author)