Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Instrumentierung

HK 56.2: Talk

Friday, March 21, 2014, 11:30–11:45, HZ 8

Commissioning of the Tagger Electronics for the BGO-OD experiment — •Francesco Messi for the BGO-OD collaboration — Physikalisches Institut, Uni-Bonn

The BGO-OD experiment, presently at a commissioning phase at the electron accelerator ELSA at Bonn University, is intended for the systematic investigation of the photo-production of mesons. The experiment is using bremsstrahlung photons from an electron beam incident upon a radiator. The photon energy is measured via the momentum analysis of the electrons in a magnetic “tagging” spectrometer. The electrons are detected in a 120 channel plastic scintillator hodoscope with a rate up to 10MHz per single channel and 50MHz for the total detector. A coincidence between two neighboring channels is required to suppress background. In addition to the measurement of the photon energy, the hodoscope provides time information for coincidence measurements. New tagger electronics were developed and are now installed. The characteristics and the performance of the new Read-Out Electronics will be presented.