BES3 time of flight monitoring system
  A Time of Flight monitoring system has been developed for BES3.   The light source is a 442-443 nm laser diode, which is stable and provides a pulse width as narrow as 50 ps and a peak power as large as 2.6 W. Two optical-fiber bundles with a total of 512 optical fibers, including spares, are used to distribute the light pulses to the Time of Flight counters. The design, operation, and performance of the system are described. 
F. A. Harris, J. W. Kennedy, Q. Liu, L. Nguyen, S. L. Olsen, M. Rosen,   C. P. Shen, G. S. Varner, Y. K. Heng, Z. J. Sun, K....