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HK: Fachverband Physik der Hadronen und Kerne

HK 40: Hadron Structure and Spectroscopy 9

HK 40.1: Group Report

Wednesday, March 25, 2015, 14:30–15:00, T/SR19

Linearly polarised photons at the BGO-OD experiment* — •Andreas Bella for the BGO-OD collaboration — Physikalisches Institut, Universität Bonn

The BGO-OD experiment, located at the ELSA accelerator of the University of Bonn, aims at the study of photoproduction reactions off the nucleon. A real, energy-tagged photon beam is produced via bremsstrahlung by irradiating a thin radiator with the electron beam provided by ELSA.

Linear polarisation is obtained by coherent bremsstrahlung. This requires a crystal radiator; in our case a 570 µm thick diamond is used.

The production mechanism of a linearly polarised photon beam via coherent bremsstrahlung, the determination of the degree of polarisation and first results obtained with a linearly polarised photon beam will be shown in this talk.

*Supported by DFG (SFB/TR-16)