Suwada, T.

Paper	Title	Page
WEP086	EPICS IOC of WindowsXP-based Oscilloscope for Fast BPM Data Acquisition System	567
	M. Satoh, K. Furukawa, T. Suwada KEK, Ibaraki T. Kudou, S. Kusano MELCO SC, Tsukuba
	In the KEK Linac, about 100 monitors (BPMs) are used for the beam orbit measurement. The previous data acquisition (DAQ) system consists of the VME and the digital oscilloscope. The maximum DAQ rate is about 1 Hz which is limited by an oscilloscope performance. We have developed the new DAQ system since we have an ongoing linac upgrade project aiming a fast beam-mode switch, in which the fast beam position measurement is strongly required up to 50 Hz. The new BPM DAQ system is a WindowsXP-based fast digital oscilloscope. The DAQ software has been initially developed by C++ and TekVISA. It acquires the waveform signal from the BPM electrodes and calculates the beam positions. It is very useful to run the DAQ software as an EPICS IOC since the most part of Linac parameters are accessible via EPICS protocol and they are archived by EPICS archiver. Recently, we developed the BPM DAQ software based on EPICS which can make the oscilloscope work as an EPICS IOC. The results of performance test show that the new DAQ software can work well up to 50 Hz. In this paper, we will describe the fast BPM DAQ software based on EPICS and the results of its performance evaluation in detail.
	Poster
THP052	New Event-based Control System for Simultaneous Top-up Operation at KEKB and PF	765
	K. Furukawa, T. T. Nakamura, M. Satoh, T. Suwada KEK, Ibaraki A. Kazakov Sokendai, Ibaraki T. Kudou, S. Kusano, T. Nakamura MELCO SC, Tsukuba
	The 8-GeV linac at KEK provides electrons and positrons to three ring accelerators of KEKB-HER, KEKB-LER and Photon Factory. Simultaneous top-up injections to those rings are carried for the ultimate experimental results at the both KEKB and PF facilities. An event-based fast control system was newly constructed overlapping the existent EPICS control system. The new system controls the distant equipment globally utilizing event modules from MRF and several other techniques. The event system enables fast controls from pico-second to milli-second range, and the conventional EPICS system covers slower controls. More than 100 parameters are driven globally by the event system every 20ms pulse in order to generate beams with three-times different energies and 100-times different charges. And more than 500 parameters are observed synchronously to ensure the beam operation. The system enables the future accelerator complex such as SuperKEKB as well. This paper describes the detailed design of the hardware and software structures, beam operation experiences, and possible extensions towards the future.
	Poster