Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Instrumentierung VII

HK 28.7: Vortrag

Dienstag, 22. März 2011, 18:00–18:15, HS2

Tagger electronics for the BGO-OD experiment — •Francesco Messi — Physikalisches Institut, Bonn, Germany

The BGO-OD experiment (Supported by the DFG within the SFB/TR-16), presently under construction at the electron accelerator ELSA at Bonn university, is intended for the systematic investigation of the photo-production of mesons off the nucleon. The experiment will use bremsstrahlung photons from an e^- beam incident upon a thin metal radiator. The photon energy will be mesured via the deflection of the electrons in the magnetic field of a photon tagger.

The electrons are detected in a 128 channel hodoscope with an expected rate up to 10MHz per single channel and 50MHz for the total detector. A coincidence between two neighbouring channels is required to suppress the background noise. Additional to the measurement of the photon energy, time information from the detection of the deflected electrons will be used for coincidence measurements in the BGO-OD experiment.

To mactch these requirements,a new tagger electronics was developed. A first prototype (one channel board) is designed and tested and a second one (multichannel) is on commissioning and should be ready to be tested in Feb 2011. First results will be presented in this talk.