Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Instrumentation und Anwendungen I

HK 18.7: Talk

Tuesday, March 11, 2008, 10:15–10:30, 2C

A Pellet Tracking System for WASA at COSY — •Tamer Tolba and James Ritman for the WASA-at-COSY collaboration — Institute für Kernphysik, Forschungzentrum Jülich, 52425 Jülich

A Pellet Tracking System (PTS) for WASA at COSY is proposed in order to determine the interaction point (the primary interaction vertex) for each event between the COSY beam and the target pellets. The knowledge of this interaction vertex helps to reconstruct the paths of the different decay products and thus to improve the momentum resolution of the events. Furthermore, the PTS gives information about the position distribution of the pellets, thereby allowing the geometrical alignment of the system to be improved. Several measurements were done in order to test and optimize the equipment’s capabilities. Furthermore, Monte Carlo simulations for the x and z position distribution of the pellets were performed. A description of the system and the results of these tests will be presented.

Supported by BMBF.