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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.12: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 2.OG

A high resolution germanium detector array for hypernuclear studies at PANDA — Sebastian Bleser¹, Jürgen Gerl², Felicce Iazzi³, 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 poster shows the ongoing development of the germanium detectors. Test measurements of a single crystal prototype with an improved cooling concept are shown. Thermal simulations for a triple crystal detector are presented. Aditionally studies of the optimization of the detector arrangement inside the PANDA barrel spectrometer are shown. Finally the status on digital pulse shape analysis is presented which will be necessary to deal with high counting rates and to recover the high original energy resolution in case of neutron damage.