Speaker
Description
In modern high energy physics detectors a calorimeter is one of the most important system to measure the energy of elementary particles. The paper is devoted to Belle II calorimeter operated at KEK. The calorimeter is based on 8736 CsI(Tl) scintillation crystals. Signals from counters are processed by electronic modules as a result recovering information about energy and time of the detected particle. Pulse shape discrimination of electromagnetic and hadronic showers with CsI(Tl) counters is a novel approach recently used at the Belle II electromagnetic calorimeter in offline reconstruction. The method allows to measure the contribution of scintillation component with faster decay time which doesn't present in scintillation emission from electromagnetic shower but indicating production of hadronic shower. This paper describes hardware implementation of such pulse shape discrimination algorithm in FPGA for online reconstruction into the current detector electronics with no need in its major upgrade. According to this algorithm modeling and calculations of signal amplitude, time, photon and hadron contributions into the waveform are presented as well as report of logic routing with estimation of available resources on FPGA.
