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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Instrumentation und Anwendungen
HK 8.2: Vortrag
Montag, 12. März 2007, 18:15–18:30, B
Optimisation of the transfer function and crosstalk in an AGATA test cryostat — •Andreas Linnemann, George Pascovici, Bart Bruyneel, Peter Reiter, Herbert Hess, and Andreas Wiens for the AGATA collaboration — Institut für Kernphysik, Universität zu Köln
Position sensitive γ-ray detection including the new γ-ray tracking technique will be feasible with the future AGATA spectrometer due to the 36-fold segmented Ge-crystals and the use of pulse shape analysis. The 180 detectors of the 4π Ge-shell will reach an unprecedented detection efficiency and position sensitivity, which is crucial for γ-ray spectroscopy at relativistic energies. Due to the high density of 111 high resolution spectroscopy channels within one AGATA triple cryostat lowest ringing and crosstalk contributions between segments are challenges for the overall γ tracking performance. The development of the new AGATA test cryostat employs the novel technique to determine electronic transfer functions of all channels simultaneously using a preamplifier including a programmable high precision pulser. The new detectors and cryostats are characterized by almost perfect transfer functions for core and segment signals and a crosstalk level below 10−3. Supported by BMBF (06 K-167).