LOI to JLab PAC 31 RF Cherenkov picosecond timing technique for Jlab 12 GeV physics program

A new particle identification device for Jlab 12 GeV physics program is proposed. It is based on the measurement of time information by means of a new radio frequency picosecond phototube (RFPP) and time measuring concept. The expected time measurement precision for Cherenkov time-of-flight (TOF) detector in a “head-on” geometry based on RFPP is about or less than 5 picoseconds, FWHM. The proposal has two goals, 1. The R&D for optimization and manufacturing of the RFPP. 2. The development, construction and test of a Cherenkov picosecond timing technique based on the RFPP, for Jlab 12 GeV physics program, in particular, the development of Cherenkov correlated timing (CCT) or time-of-propagation detector (TOP) and Cherenkov TOF detector in a “head-on” geometry. It is supposed that the RFPP will be manufactured by the US company and that the prototype Cherenkov detectors will be constructed at Yerevan, tested at Yerevan and at Tohoku University electron stretcher-booster and latter at JLab.