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Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 64: Instrumentierung

HK 64.5: Talk

Friday, March 21, 2014, 15:00–15:15, HZ 9

Commissioning of the recoil detector for the day-one experiment at HESR with pp elastic scattering at COSY — •Huagen Xu — Forschungszentrum Juelich

The conceptual design of the luminosity monitor for the PANDA experiment is based on measuring the differential elastic antiproton-proton scattering rate by 4 planes of HV-MAPS tracking detector. The absolute precision is limited by the lack of existing data in the relevant momentum region. Therefore, the so-called Day-One experiment at HESR will measure antiproton-proton elastic scattering. The goal of this experiment is to measure a wide range of 4-momentum transfer t (0.0008-0.1 GeV2) so that the contribution of the physical differential distributions to the absolute luminosity uncertainty is less than 1%. The polar angle of scattered antiprotons and the energy of recoil protons will be measured at forward angles by tracking detectors and by thick energy detectors near 90, respectively. In order to test the method proposed for the Day-One experiment one of the recoil arms has been designed and built. The commissioning of the recoil arm by measuring proton-proton elastic scattering has been performed at COSY in July and September of 2013. The preliminary results of the commissioning will be presented.

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