Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 41: Instrumentation und Anwendungen

HK 41.8: Vortrag

Mittwoch, 9. März 2005, 15:45–16:00, TU MA041

New Pion Beam Detectors for HADES — •B. Spruck — 2. Physikalisches Institut, Universität Gießen

One of the upcoming experiments with HADES will be the study of pion induced reactions. The quality of the secondary π⁻ beam was investigated in a test beam time in may 2004. A scintillating fiber X/Y array of 1mm granularity was used to measure the beam dimension near the target position. The momentum of an individual pion is determined by its position in the dispersive plane behind the first dipol in the beam line, obtained from two plastic scintillator hodoscopes with 1cm broad rods. With this granularity the hodoscopes will not cope with the expected high secondary beam intensities. Based on the design of the fiber beam monitor two new hodoscopes are being developed consisting of 64 2mm fibers read out with multianode photomultipliers on both sides. The results of the commissioning beam time and the progress on the new pion trackers will be presented.
^*This work is supported by BMBF and GSI