JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
The Japan Proton Accelerator Research Complex (J-PARC) consists of a 400 MeV linac (181 MeV at present), a 3 GeV rapid cycling synchrotron (RCS), a 50 GeV (30 GeV at present) main ring (MR) and several experimental facilities. At present the entire accelerator complex is in the operational stage and delivering relatively a high power beam to all experimental facilities. There are two stages of injection and extraction in the entire complex. The RCS utilizes charge-exchange H- painting injection scheme, then accelerate beam up to 3 GeV and is simultaneously extracted for the Material and Life science Facility (MLF) and for the MR injection. Starting with a 3GeV injection, the MR accelerates beam up to 30 GeV and delivered either to the neutrino experimental facility or to the hadron experimental facility through corresponding extraction channel. In order to have a high quality beam, there are many challenges in each accelerator especially, with injection and extraction systems and becomes significant towards achieving higher beam power. The operational experience from all aspect with J-PARC injection and extraction systems will be presented.
