Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 53: Poster – Instrumentation
HK 53.30: Poster
Donnerstag, 22. März 2012, 14:00–16:00, P Foyer
Data Acquisition System for DAGATA Compton Polarimeter — •A. Givechev1, B. Alikhani1, A. Heinz2, J. Leske1, O. Möller1, N. Pietralla1, and C. Röder1 — 1Institute for Nuclear Physics, Darmsatdt, Germany — 2Subatomic Physics Devision, Chalmers University of Technology, Gothenburg, Sweden
Polarization measurements of high-energy gamma-rays require a polarimeter with high polarization sensitivity. To achieve this a complex detector array has been designed. To setup and operate such a detector array a special data acquisition system is required. The DArmstat GAmma-ray Tracking Assembly (DAGATA) is a detector array based on three highly segmented HPGe detectors of the AGATA type[1]. Its 36-fold segmented germanium crystals significantly enhance the polarization sensitivity. For its readout a new type of data acquisition system was designed. It includes commercially available flash-ADC modules. The new system is based on Digital Signal Processing technology and replaces all standard analog modules used up to now. Controlled by a computer with specially designed software it provides the necessary data for the polarization measurements. The Data Acquisition System was tested in a polarization measurement[2] in IKP of Technical University Darmstadt . The structure and performances of the Data Acquisition System for the polarization measurements will be presented.
* Funded by DFG (SFB 634) and LOEWE (HIC for FAIR)
[1] S. Akkoyun et al, Nucl. Instr. Meth. Phys. A, In Press (2011)
[2] B. Alikhani, A. Givechev et al, subm. Nucl. Instr. Meth. Phys. A (2011)