Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 9: Instrumentation
HK 9.2: Vortrag
Montag, 4. März 2013, 11:30–11:45, HSZ-405
Recoil Detector Test for the Day-One Experiment at HESR — •Qiang Hu1,2, Huagen Xu2, and James Ritman2 — 1Institute of Modern Physics,CAS,730000 Lanzhou,China — 2Forschungszentrum Juelich,52425 Juelich,Germany
The proposed day-one experiment at HESR is a dedicated measurement of antiproton-proton elastic scattering. The aim of the day-one experiment is to determine the elastic differential parameters (total cross section σT, the ratio of real to imaginary part of the forward scattering amplitude ρ, and the slope parameter B) by measuring a large range of 4-momentum transfer squared t (0.0008 - 0.1 GeV2). The conceptual design of the day-one experiment is to measure the elastic scattered antiproton and recoil proton, by a tracking detector in the small polar angle range and by an energy detector near 90∘, respectively. The recoil arm covers a maximum polar angle range from 71∘ to 90∘ and consists of two silicon strip detectors (76.8 (length)×50.0 (width)×1.0 (thickness) mm3) and two germanium detectors (80.4 (length)×50.0 (width)×5.0 (11.0) (thickness) mm3). All detectors are single sided structure with 1.2 mm pitch. The silicon detectors will be used to detect recoil protons with energy up to about 12 MeV and the germanium detectors will be used to detect protons with energy from 12 MeV to 60 MeV. At present, one recoil arm is being constructed and the test for the detectors with radioactive sources is on-going. Preliminary test results indicate that all detectors are operational and work properly. The latest test results of these detectors will be presented.