R&D Status of the Time-Of-Propagation Counter 

Takayoshi Ohshima


     Cherenkov ring image produced in a crystal bar can be measured by detecting both the time of propagation of the photons to the bar-end and their horizontal emission angle. It makes the detector compact. We tested a prototype detector to study its basic performance. A single photon sensitive and position sensitive multi-anode photo-tube operable under the strong magnetic field has been also developed. Current status of such R&D's will be presented.