From the fruitful experiences with CLAS12 Forward tagger towards the next generation calorimeters

The JLab CLAS12 Forward tagger, made of an electromagnetic calorimeter based on PbWO4 crystals (FT-Cal), a scintillation hodoscope (FT-Hodo), and a Micromegas tracker (FT-Trk), detects electrons and photons scattered at polar angles from 2 to 5 degrees (wrt the incoming electron beam). The FT, in conjuction with the CLAS12 detector, has been designed to meet the physics goals of the hadron spectroscopy program MesonEx running in Hall-B at Jefferson Lab. Thanks a limited number of channels (the FT-Cal has only 332) and the combination of several detectors usually used to trigger the CLAS12 DAQ, FT represents the ideal bench test to perform real on-beam test of modern, powerful and flexible DAQ system based on streaming readout approach.

In this presentation the layout and the performance of FT will be presented. Moreover results of successful on-beam tests of the first Jefferson Lab implementation of a full FT SRO DAQ will be discussed. Based on the FT experience, in the last part of the presentation I will discuss options for next generation of homogeneous calorimeters, focusing on challenges related to a SiPM-based readout coupled to SRO DAQ (limited area coverage, linearuty, gain stability, dynamic range).