A trigger readout system for the Forward Calorimeter(FoCal)
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The University of Bergen, Norway is currently involved in the development and building of the Forward Calorimeter (FoCal) as an upgrade to the ALICE (A Large Ion Collider Experiment) detector at CERN (European Organization for Nuclear Research). In the case of particle detectors, as at CERN, trigger systems are utilized for data acquisition (DAQ). Data to be acquired pertains to charged particles passing through a charged particle detector. However, it is not desirable that data pertaining to absolutely all such events is data stored for further processing, as this would waste an incredible amount of memory and time. Therefore, a trigger system in this context must include a mask which can discard events which are considered uninteresting so that only relevant data is stored. At the same time, events of interest must be immediately allowed to be measured and stored. The focus of this work has been to develop the trigger readout system in the hardware description language called VHDL. The system allows a user to configure the aforementioned mask such that only desired events are recorded. The result of this work is a trigger readout system which functions in simulation, yet remains to be tested and verified on physical devices.