Abstract
A Beam Loss Monitoring (BLM) System has been built up for the 800MeV storage ring in National Synchrotron Radiation Laboratory. It has helped to resolve some problems about beam lifetime. This paper introduces the data acquisition system of BLM. It has a counter whose counting rate is higher than 10MHz. Furthermore, this counter is a free running one that will never lose any pulse when it is being read or written. This DAQ system is composed of 14 front-ends and a console connected via CAN bus. The intensity, distribution and time information of the beam loss can be offered by this system. This BLM system is helpful for machine study and operation.
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