Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Instrumentierung

HK 44.1: Vortrag

Donnerstag, 20. März 2014, 14:00–14:15, HZ 9

A high resolution germanium detector array for hypernuclear studies at PANDA — Sebastian Bleser¹, Jürgen Gerl², Felicce Iazzi³, Jasmina Kojouharova², Ivan Kojouharov², Josef Pochodzalla⁴, Kai Rittgen⁴, Cihan Sahin⁴, Alicia Sanchez Lorente¹, and •Marcell Steinen¹ — ¹Helmholtz-Institut Mainz — ²GSI Darmstadt — ³Politecnico and INFN, Torino — ⁴Institute for nuclear physics, JGU Mainz

The PANDA experiment, planned at the FAIR facility in Darmstadt, aims at the high resolution γ-spectroscopy of double Λ hypernuclei. For this purpose a devoted detector setup is required, consisting of a primary nuclear target, an active secondary target and a germanium detector array for the γ-spectroscopy. Due to the limited space within the PANDA detector a compact design is required. In particular the conventional LN₂ cooling system must be replaced by an electro mechanical device and a new arrangement of the crystals is needed.

This presentation shows the progress in the development of the germanium detectors. First results of in-beam measurements at COSY with a new electro mechanically cooled single crystal prototype are presented. Digital pulse shape analysis is used to disentangle pile up events due to the high event rate. This analysis technique also allows to recover the high original energy resolution in case of neutron damage. Finally the status of the new triple crystal detector prototype is given.