Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 31: Instrumentation and Applications IV

HK 31.1: Gruppenbericht

Mittwoch, 10. März 2004, 14:00–14:30, C

The WASA detector at COSY-Jülich — •V. Hejny¹, M. Büscher¹, H. Calen², C. Ekström², A. Gillitzer¹, D. Grzonka¹, C. Hanhart¹, B. Höistad³, K. Kilian¹, S. Krewald¹, S. Kullander², R. Maier¹, W.v. Oers⁴, J. Ritman^1,5, H. Ströher¹, and M. Wolke^1,2 — ¹IKP, FZ-Jülich — ²TSL, Uppsala, Sweden — ³ISV, Uppsala, Sweden — ⁴Univ. of Manitoba, Winnipeg, Canada — ⁵2. Phys. Inst., Univ. Gießen

The WASA (“Wide Angle Shower Apparatus”) detector, currently installed at the CELSIUS storage ring of TSL, has a close to 4π angular acceptance for charged and neutral particles from proton induced interactions in a hydrogen or deuterium frozen pellet target.

After the end of the experimental program at CELSIUS in summer 2005, the measurements with WASA will be continued at COSY-Jülich where a photon detector is missing up to now. COSY offers higher beam momenta (up to 3.65 GeV/c as compared to 2.10 GeV/c at CELSIUS) with polarized and phase-space cooled proton and deuteron beams. Almost any final state of pN, pd and dd reactions can be detected, resulting in a major expansion of the experimental potential both of WASA and COSY. Significant progress in the understanding of strong interaction processes, hadronic systems and their decays as well as the underlying symmetries can be expected from the data to be obtained with WASA at COSY. The status of WASA relocation to COSY will be presented and the anticipated experimental program will be discussed.