Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.21: Poster

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

Development of a cooling system and vacuum chamber for the pion tracker for HADES — •Joana Wirth — Excellence Cluster "Universe", TU München, Boltzmannstr. 2, 85748 Garching, Germany

One of the future experiments planned at SIS18 with the HADES spectrometer in GSI Darmstadt envisages the employment of pion beam colliding on LH2 or nuclear target. Due to the fact that secondary pion beam has high momentum spread, since the precise knowledge of pion momentum is mandatory to carry out the planned exclusive measurements, we have to measure the momentum for each individual pion.

For this purpose our group is developing a pion beam tracking system, which consists of two silicon detectors. Both detectors are located in the beamline and therefore have to cope the high-intensity secondary beam. Cooling of a silicon detector strongly improves its radiation hardness and performance. It reduces the leakage current and thus the noise, which is important for the detection of MIPs like pions.

We have designed and built a complete prototype system of vacuum chamber and detector cooling. With use of the Finite Element Method we simulated the mechanical and thermal properties of the prototype.

The proposed poster will show the current status and performance of the cooling system for a test-detector, focusing on the reduction of the leakage current and the noise.