The P̄ anda Barrel Time-of-Flight detector

Abstract The Barrel-Time-of-Flight detector is one of the outer layers in the multi-layer design of the P anda  target spectrometer, covering a polar angle region of 22 ° θ l a b 150 ° . P 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 90 × 30 × 5 mm 3 fast plastic scintillator tile and 3 × 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 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 π /K separation of 4 sigma up to the Cherenkov threshold.