Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Instrumentierung
HK 45.4: Vortrag
Donnerstag, 20. März 2014, 15:00–15:15, HZ 10
Optimization of the target system for the hypernuclear experiment at PANDA — •Sebastian Bleser1, Felice Iazzi2, Josef Pochodzalla3, Kai Rittgen3, Cihan Sahin3, Alicia Sanchez Lorente1, and Marcell Steinen1 — 1Helmholtz-Institut Mainz — 2Politecnico di Torino and INFN, Sez. di Torino, Italy — 3Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz
Gamma spectroscopy of double Λ hypernuclei will be one of the main topics addressed by the PANDA experiment at the planned FAIR-facility at Darmstadt, Germany. For this project a dedicated hypernuclear detector setup will be installed. In addition to the general purpose of the PANDA detector it consists of a primary nuclear target for the production of Ξ−+ Ξ pairs, a secondary active target for the formation of hypernuclei and the identification of associated decay products as well as a germanium detector array to perform γ spectroscopy.
Results of the current hardware development will be presented in the talk: For the positioning of the primary filament target in the beam halo the functionality of piezo motors is investigated in vacuum. Stability tests of the primary target chamber are performed with various thin materials. For the secondary target the readout of silicon microstrip detectors with ultra-thin flexible cables is checked to fan out the readout electronics. Furthermore, design studies of support structures for the whole detector setup are considered.
On the simulation side a compromise between the stopping probability of Ξ− hyperons and the reconstruction accuracy of weak decay pions will be discussed.