Status of new power supply for bending magnet in J-PARC Main Ring upgrade

It plans that the proton beam power provided to experimental facilities increase with shortening repetition period in J-PARC MR. As the shorten repetition period, the replacement of the power converters for main magnets in J-PARC MR is necessary to cope with issues such as power fluction of the Main Grid and increase of the output voltage. We have considered and developed the power converter with a 10MW class which have the capacitor bank with large capacitance. In the end of 2017, the first new power converter for a bending magnets family is installed in J-PARC site and the power test is ongoing using a dummy load. In this report, the first new power converter for a bending magnets family in J-PARC MR is reported including the test result. (author)