Present Status of the J-PARC Cesiated RF-driven H- Ion Source

Operation of a cesiated RF-driven negative hydrogen ion source was initiated in September 2014 in response to the requirements of beam current upgrade in J-PARC linac. Delivery of the required beam current from the ion source to the J-PARC accelerators has been successfully performed. In 2016-2017 campaign, continuous operation of the ion source for 1,845 hours (RUN#75 from April to July 2017) was achieved with beam current, RF pulse width and repetition of 45 mA, 0.8 ms and 25 Hz, respectively. We present the operation status of the ion source and a high current H- beam with 70 mA extracted from the ion source for further high-power upgrade in J-PARC accelerators.