Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 64: Instrumentierung
HK 64.8: Vortrag
Freitag, 21. März 2014, 15:45–16:00, HZ 9
Development of the Pion Tracker for HADES spectrometer — •Rafal Lalik for the HADES collaboration — Excellence Cluster “Universe”, TU München, Boltzmannstr.2, 85748 Garching, Germany
The beam detector for experiments with pion beams at the HADES spectrometer in GSI Darmstadt has been developed. The main goal of this development is to provide efficient event by event reconstruction of secondary pion momenta. Pions are created impacting nitrogen or proton beams on a secondary beryllium target and are then delivered through a chicane to the experimental areas. The expected momentum spread of the secondary pion beam is about 8% whereas simulated resolution of reconstructed momenta is below 0.5%.
The challenging issue is to achieve an accurate measurement (on order of per-mile) of each pion in a high intensity (108 part./spill) environment along the pion-bean chicane. This translates into a rate of 106 pion/spill with a kinetic energy of 1–2 GeV at the HADES target point.
The tracking system is based on double-sided silicon strips sensors build in radiation hardness technology, and a n-XYTER ASIC front-end readout. The trigger logic is implemented in the TRB3 boards. The whole system is designed as a standalone, easy scalable and portable.
In this talk we are showing status and performance of the system, and recent results obtained in the laboratory and with proton beams at COSY with 2 GeV protons.
This work is supported by Helmholtz VH-NG-330.