The new HADES ToF Forward Detector

The High-Acceptance DiElectron Spectrometer (HADES) at GSI Darmstadt consists of a 6-coil toroidal magnet centered on the beam axis and six identical detection sections located between coils covering polar angles 18° 85°. physics aims include study properties hot dense hadronic matter as well elementary pion-induced reactions. To increase acceptance HADES very low in forward region, 0.5∘ 7°, new detector, Forward Detector (FD), has been built. FD is composed tracking Time Of Flight (TOF) detector based Resistive Plate Chamber (RPC) technology. TOF an area around 2 m2, by 128 strip-like shielded RPC cells, with two different widths 22mm 44mm 750mm length distributed four modules symmetrically placed axis. Each cell gas gaps, 0.270mm, delimited three (2mm) aluminum (1mm) glass electrodes. In order to cope expected maximum particle load 400 Hz/cm2, close axis, operated above room temperature decrease resistivity count rate capability. Details system construction results concerning timing precision are described this communication. was 31.5 °C 600 Hz/cm2 during production time for weeks early 2022 showing average 80 ps.