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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.