Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 23: DAQ, Trigger, Elektronik 1

T 23.4: Talk

Monday, March 24, 2014, 11:45–12:00, GFH 01-731

ASIC-Based Readout for a Large-Scale COBRA Experiment — •Oliver Schulz — Max-Planck-Institut f. Physik, München

The COBRA-experiment searches for neutrinoless double beta decays, especially of ¹¹⁶Cd, using CdZnTe semiconductor detectors.

Currently, the COBRA underground setup employs discrete amplifiers and rack-based digitizers to read out the signals of the detector crystals. For the large-scale experiment ultimately envisioned, however, such a readout may not be feasible.

An integrated solution would make it possible to move the complete readout, including digitization, near the detectors. It would severely reduce the amount of cabling required within the ultra-low background region of the experiment, in comparison to external electronics. It would also come at lower cost and power consumption and require significantly less space.

We present the results of first tests using an ASIC, with integrated charge amplifiers and switched-capacitor array sampling, to directly read out coplanar-grid (CPG) CdZnTe detector signals, including pulse shape recording.