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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.67: Poster

Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster

Magnetic field mapping at the BGO-OD experiment — •Philipp Bielefeldt for the BGO-OD collaboration — Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn

The new BGO-OD experiment at the ELSA accelerator, Bonn, is built to systematically investigate meson photoproduction, with measures planned for associated strangeness, vector and pseudoscalar meson final states. A nearly 4 π acceptance central BGO calorimeter is complemented by a tracking magnetic spectrometer in forward direction.

In order to optimise the spectrometer’s resolution, a thorough understanding of the magnet’s fringe fields is needed, obtained from both simulation and precision measurements. A short overview of simulation and measurement techniques as well as a comparison of their recent results will be given and the effect on BGO-OD’s momentum reconstruction will be discussed.