Münster 2011 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Instrumentierung VIII
HK 46.3: Talk
Wednesday, March 23, 2011, 17:30–17:45, HS1
Antiproton-proton elastic scattering as a day-one experiment at HESR — •Huagen Xu and James Ritman — Forschungszentrum Juelich
The conceptual design of the luminosity monitor for the PANDA experiment is based on measuring the differential elastic Antiproton-Proton scattering rate. The detector will be located at about 10m downstream of the target and will measure forward outgoing antiprotons which are emitted at angles of 3-8 mrad relative to the beam axis. The angle of the scattered antiproton will be reconstructed by measuring the track with 4 planes of silicon strip detectors. The absolute precision is limited by the lack of existing data on this system in the relevant momentum region, therefore a day-one experiment at HESR dedicated to antiproton-proton elastic scattering has been proposed. 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 angle by tracking detectors and by thick energy detectors near 90∘ polar angle area, respectively. The conceptual design of day-one experiment is nearly finished. The commissioning of devices with proton-proton elastic scattering will take place at COSY.