Design, construction, and test of the KLOE low energy tagger crystal calorimeters for gamma gamma physics. Prof. Antonio Di Domenico The KLOE experiment is going to restart taking data at the end of 2009 with the detector upgraded with a tagger for the identification of gamma-gamma interactions. The low energy electrons and positrons (in the range of few hundreds MeV) produced in the process e+e- -> e+e- X will be detected by a couple of compact calorimeters, called low energy taggers (LET), installed near the interaction region inside the KLOE detector. Scintillating crystals (like LSO or PbW04) seem to match the requirements for the LET detectors in terms of energy and time resolutions, and compactness. The most recent photodetector technologies (like APD or SiPM) seem appropriate for the read-out of the crystals. The student will join the activity of the KLOE-Rome group in designing, making the final choices of crystal and photodetectors (with tests on prototypes with cosmic rays or in test beams), and in constructing, and testing the LET calorimeters. Period: after September 15th. |