München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.85: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

Development of a gas target for electron scattering coincidence experiments* — •O. Schmidt, P. von Neumann-Cosel, A. Richter, and G. Schrieder — Institut für Kernphysik, Technische Universität Darmstadt, Germany

Currently a large solid angle Si detector is developed at the S-DALINAC for break-up experiments of the type (e,e’p) and (e,e’pp) on few-body nuclei. The objectives of this project are to probe the three-body forces in light nuclei and verifying the predictions of the Effective Field Theory in the low-energy and low-momentum transfer regime. For coincidence experiments on ^3,4He a gas target compatible with the Si detector is needed. The requirements are a sufficiently high counting rate and resolution and low energy loss of the break-up protons. The chosen solution is a low temperature gas target operated at approximately 20 K consisting of a cylindrical metal frame covered with thin Havar and Kapton foils.

Problems and solutions in the design and construction are presented.

*Supported by the DFG through SFB 634.