PERFORMANCE RESULTS OF ASSEMBLED SENSOR PLANE PROTOTYPES FOR SPECIAL FORWARD CALORIMETERS AT FUTURE E+E- COLLIDERS
Astroparticle Particle Space Physics Radiation Interaction Detectors and Medical Physics Applications(2012)
Abstract
The FCAL Collaboration prepared two sensor plane prototypes for the Luminosity Calorimeter (LumiCal) and Beam Calorimeter (BeamCal) for a future linear collider detector. For both several challenges appeared. The luminosity measurement has to be done with a precision of 10(-3), requiring LumiCal to be a precision device. BeamCal has to operate in a harsh radiation environment and needs radiation hard sensors. Two sensor technologies are considered - Si sensors for LumiCal and GaAs:Cr for BeamCal. A full chain comprising a sensor, fan-out and front-end ASIC was successfully studied in the lab and in a 4.5 GeV electron beam at DESY. Performance parameters like Charge Collection Efficiency (CCE), the Signal to Noise ratio (SIN) were measured. In a second beam test the readout is completed by a multi-channel ADC chip and data concentrator.
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