Beam loss monitoring system of BEPC II and its first application

The beam lifetime is an important parameter and it can affect the operation of the storage ring. By using the beam loss monitoring system, it can provide some explanation for the beam loss, to optimize the machine parameters and to further increase the beam lifetime. In this article, a beam loss detecting system for BEPC II is introduced. The system is composed of the front-end electronics, the CAN bus and DAQ. Finally, the first application of the beam loss detection system for BEPC II is presented too.