SYNCHRONIZED DATA MONITORING AND ACQUISITION SYSTEM FOR J-PARC RCS

J-PARC 3GeV RCS (Rapid Cycling Synchrotron) is a proton synchrotron with an extreme high power of 1MW, and delicate care must be taken to suppress radiation due to beam loss. The RCS injects each beam pulse of 25 Hz into the MLF (Material and Life Science Facility) and the MR (50GeV Main Ring) in a predefined order. Furthermore, the different beam control parameters are required for the MLF and the MR. Therefore, in order to reduce beam loss, synchronicity of data is indispensable. For this reason, control data monitoring and acquisition must be made separately for each beam pulse, distinguishing the destination in the control system. The data, which require synchronicity monitoring and acquisition, are such as beam position data [BPM (Beam Position Monitor) data]. We select mainly these data, and we are developing the synchronized data monitoring and acquisition system based on RM (Reflective Memory), WER (Wave Endless Recorder). The status of development and some test results for this system will be presented in this report.