supported by the National Natural Science Foundation of China (Grant Nos. 10875117 and 11005106);National "985 Project" (Grnat No. 173123200402002);China Postdoctoral Science Foundation (Grant No. 20100470853);"the Fundamental Research Funds for the Central Universities"
An S-band cavity BPM is designed for a new injector in National Synchrotron Radiation Laboratory. A re-entrant position cavity is tuned to the TM110 mode as position cavity. Cut-through waveguides are used as pickups ...