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The (P)over-barANDA Barrel Time-of-Flight detector

Author:
Zimmermann, S.  Suzuki, K.  Steinschaden, D.  Kratochwil, N.  Nalti, W.  Orth, H.  Schwarz, C.  Lehmann, A.  Boehm, M.  Brinkmann, K. -Th.  


Journal:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT


Issue Date:
2020


Abstract(summary):

The Barrel-Time-of-Flight detector is one of the outer layers in the multi-layer design of the (P) over bar ANDA target spectrometer, covering a polar angle region of 22 degrees < theta(lab) < 150 degrees. (P) over bar ANDA, which is being built at the FAIR facility, will use cooled antiprotons on a Hydrogen or nuclei target, to study a variety of topics in hadron physics. The detector is a scintillating tile hodoscope with an SiPM readout. A single unit consists of a 90x30x5 mm(3) fast plastic scintillator tile and 3 x 3 mm(2) SiPM photosensors on both ends. Four SiPMs are connected in series to overcome the limited sensor size of a single SiPM sensor and to improve the time resolution drastically (100 ps to 50 ps). While the (P) over bar ANDA experiment is equipped with DIRC detectors for PID of faster particles, the Barrel TOF complements the setup by providing additional PID information with a pi/K separation of 4 sigma up to the Cherenkov threshold.


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