Charged-particle flow measured with the KRATTA detector in the ASY-EOS experiment

The flow of light charged particles from the Au+Au reaction at 400 AMeV measured with the KRATTA detector is presented. The results are compared with the FOPI data. The KRATTA detector (Krakow Triple Telescope Array) [1] has been used to measure the energy, emission angles and isotopic composition of light charged reaction products in the ASY-EOS experiment at GSI laboratory [2]. This versatile, low threshold, broad energy range system consists of 38 independent modules which can be arranged in an arbitrary configuration Fig. 1 presents the used 7×5 array. A single module, covering actively about 4.5 msr of the solid angle at the optimal distance of 40 cm from the target, consists of three identical, 500 μm thick, large area photodiodes, used also for direct detection, and of two CsI(1500 ppm Tl) crystals of 2.5 and 12.5 cm length, respectively. The presented results come from the analysis of the experimental data for Au+Au at 400 MeV/nucleon incident energy. Signals from the KRATTA modules have been stored for the off-line analysis using the 100 MHz V1724 CAEN digitizers. The pulse shape analysis allowed to decompose the complex signals from the middle photodiode (Single Chip Telescope [3] segment, SCT) into the ionization and scintil