Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentation
HK 27.2: Vortrag
Mittwoch, 21. März 2012, 14:30–14:45, P 3
Status of studies for luminosity measurement at PANDA detector* — •Anastasia Karavdina1, Achim Denig1,2, Miriam Fritsch1,2, Prometeusz Jasinski2, Mathias Michel2, and Tobias Weber2 — 1Institut für Kernphysik, Universität Mainz — 2Helmholtz-Institut Mainz
A good luminosity monitoring is crucial for the PANDA experiment at the planned antiproton accelerator HESR (FAIR, Darmstadt, Germany). For the measurement of the luminosity one can use the elastic antiproton-proton scattering at extreme forward angles. This exploits the fact that the elastic scattering in the range of very small momentum transfer (and thus very small scattering angle) can be calculated exactly from QED. At larger scattering angles the hadronic component of the elastic scattering dominates and this has to be taken from models based on measurements.
The current design for the luminosity monitor are four planes of eight thin double-sided silicon microstrip detectors with trapezoidal shape. The detector itself has an angular acceptance from 3 to 8 mrad and good spatial resolution due to using sensors with high resolution (50 um pitch). There is no particle identification foreseen yet.
In this talk an overview of the basic concept and Monte Carlo based performance studies will be presented. In more detail studies will show which number of ghost tracks and tracks from inelastic reactions are expected in the luminosity monitor and how they can be reduced or suppressed.
*supported by BMBF and HGF