Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 13: Instrumentation 5

HK 13.6: Talk

Monday, March 23, 2015, 18:30–18:45, M/HS2

Spatial and Energy-loss Measurements of a PANDA STT Prototype — •Haroutioun Ohannessian, Peter Wintz, and James Ritman for the PANDA collaboration — Forschungszentrum Juelich

The PANDA experiment will study charmonium and open charm physics, gluonic excitations and the nucleon structure by means of interaction of antiprotons with protons and nuclei. The PANDA central tracker consists of 4636 straw tube drift detectors, which are arranged in a hexagonal layout. The straws have a diameter of 10 mm and a wall thickness of 27µm and are filled with a mixture of Ar/CO₂ (9:1) gas operating at a high voltage of about 1800 V at a pressure of 2 bar absolute.

The readout system provides drift time information for trajectory reconstruction and momentum determination. Moreover, specific energy-loss information is provided for particle identification (p, K, π separation < 0.8 GeV/c).

The STT prototype consists of 96 straws, which are being tested by cosmic and beam measurements in the Forschungszentrum Jülich. Measurements are being performed using the COSY accelerator to provide beams of protons and deuterons at momenta in the range of 0.6 - 3 GeV/c. This information will be used for particle identification (p/d separation).

This presentation will show the results of the different measurements that have been taken recently at COSY. In addition, further improvements on the next STT prototype will be discussed.