Readout Electronics for the Calice Ecal and Tile Hcal

The aims of the CALICE test beam program are presented. The proposed electronics readout system for the CALICE ECAL is described. It is a purposebuilt VME-based, unbuffered system. 1 The CALICE Collaboration The CALICE collaboration [1] is a group of 140 people from 24 institutes in Europe, US and Asia. The collaboration is planning a beam test program starting in 2004 to study both electromagnetic (ECAL) and hadronic (HCAL) calorimeters for a future linear collider (LC). The ECAL will be a silicon-tungsten sandwich sampling calorimeter [2] and there are various options under investigation for the HCAL, namely using tile scintillators with analogue readout [3] or RPCs or GEMs with digital readout [4] as the sensors. The main driver for these choices is the requirement of fine granularity for the “energy flow” algortihms used to obtain the jet resolutions necessary for LC physics [5]. The beam test program will test the ECAL and all versions of the HCAL in an integrated data acquisition system so the data from both calorimeters can be analysed together. It is planned to do a systematic study of the dependence of ∗ e-mail address: [email protected]