Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 69: Instrumentation 19
HK 69.2: Vortrag
Freitag, 27. März 2015, 15:00–15:15, M/HS1
Development of a Pico-Second Start Counter — •Michael Dickescheid, Matteo Cardinali, Oliver Corell, Matthias Hoek, Werner Lauth, Sören Schlimme, Concettina Sfienti, and Michaela Thiel — Institut für Kernphysik, Johannes Gutenberg Universität Mainz.
The goal is to develop a hodoscope with a time resolution of less than 50 ps. To achieve this level of precision, the obvious choice is to use the Cherenkov effect because of the prompt photon-production. The detector itself consists of 64 fused-silica radiator bars (5×5×140 mm3) in an 8×8 matrix attached to an microchannel plate photomultiplier tube with 64 pixels (one bar per pixel). The segmented radiator design allows improving the time resolution depending on the number of traversed radiator bars. Also the number of detected photons per pixel is important as it improves the time resolution. Signal discrimination will be done using custom-made front-end electronics and a TRB3 system [1] will be used for data acquisition.
The performance of the detector will be determined using a low intensity electron beam at the MAMI accelerator in Mainz with a momentum of 855 MeV/c. The obtained data will be compared to detailed Monte Carlo simulations. In this contribution the experimental setup will be described in more detail. Also first preliminary results from the test experiment will be shown.
[1] A. Neisser et al., INST 8 C12043 (2013).