CURRENT STATUS OF THE CONTROL SYSTEM FOR J-PARC ACCELERATOR COMPLEX

J-PARC is a large scale facility of the proton accelerators for the multi-purpose of scientific researches in Japan. This facility consists of three accelerators and three experimental stations. Now, J-PARC is under construction, and LINAC is operated for one year, 3GeV synchrotron has just started the commissioning in this October the 1st. The completion of this facility will be next summer. The control system of accelerators established fundamental performance for the initial commissioning of LINAC and RCS. The most important requirement to the control system of this facility is to minimize the activation of accelerator devices. In this paper, we show that the performances of each layer of this control system have been achieved in the initial stage. OVERVIEW OF FACILITY The H-beam is generated at the Ion source of LINAC, and accelerated up to 181MeV, 5mA, 500us, 25Hz. Next, the beam goes through charge exchanger foil at the injection part of 3GeV-RCS (Rapid Cycle Synchrotron) and the proton beam is accelerated to 3GeV in 20ms. Most of the output beam of RCS are carried to MLF (Material and Life Science Facility, neutron beam experiments station), but four pulses switch to 50GeV-MR(Main Ring) in each 3.5sec cycle. Fig.1 Overview of J-PARC site MLF receives the proton beam at the liquid mercury target, and several mechanical shutters for the neutron beam are operated with synchronization of the beam repetition. In future, 23 neutron beam lines will be settled for many kind of experiment. MR provides accelerated proton beam to two facilities. One is Hadron Beam Facility for the elementary particle physics, and the other is neutrino experimental station. In the 2nd phase of this project, LINAC provides the extra-high power beam t