Operation status of J-PARC H ion source

Shibata, Takanori*; Okoshi, Kiyonori ; Ueno, Akira  ; Ikegami, Kiyoshi*; Shinto, Katsuhiro   ; Nammo, Kesao*; Kawai, Isao*; Oguri, Hidetomo  

In the recent J-PARC user operation from Nov. 10th, 2022 to Jun. 22nd, 2023, continuous operation of 4,412 hours with hydrogen negative ion (H ion) beam current up to 60 mA was achieved by J-PARC radio frequency (RF) H ion source. This was also the first time to supply H ion beam to the linac in the yearly J-PARC user operation term by a single ion source (w/o ion source exchange). To satisfy the requirements of the further upgrade in J-PARC, a soundness evaluation of the present ion source components has been performed. Furthermore, the RF ion source with a newly manufactured RF antenna coil has been under development.