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Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Instrumentation und Anwendungen I

HK 11.7: Talk

Monday, March 10, 2008, 18:15–18:30, 2C

Upgrade of the WASA Detector with a New Forward Window Hodoscope* — •Annette Pricking1,2, Mikhail Bashkanov1, Jens Bisplinghof2, Heinz Clement1, Evgueny Doroshkevich1, Frank Hinterberger2, Olena Khakimova1, Florian Kren1, Tatiana Skorodko1, and Gerhard J. Wagner1 for the WASA-at-COSY collaboration — 1Physikalisches Institut der Universität Tübingen — 2HISKP, Universität Bonn

One of the primary objectives of experiments at the WASA detector, which has been installed recently at COSY, is the study of symmetry breaking in strong interaction processes. In order to run at highest possible luminosities WASA has been upgraded by a new Forward Window Hodoscope. It covers the conical exit window of the cylinder symmetric scattering chamber towards the Forward Detector assembly and possseses a much increased granularity. Since it will be used in future also for trigger purposes and as time-of-flight start detector, the light collection had to be optimized with the additional condition to keep the detection efficiency as homogeneous as possible over the full hodoscope area. Further geometrical constraints were given by the very restrictive space available in the respective area of the WASA setup.

The new Forward Window Hodoscope has been installed during the COSY shutdown in August and is used since then in the experimental runs at WASA. The performance of the new detector will be presented.

*supported by BMBF, COSY-FFE and DFG(Eur. Graduate School)

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