TA-POS-2017-008

The high precision experiment PANDA is specifically designed to shed
new light on the structure and properties of hadrons. PANDA is a fixed
target antiproton proton experiment and will be part of Facility for
Antiproton and Ion Research (FAIR) in Darmstadt, Germany. When
measuring the total cross sections or determining the properties of
intermediate states very precisely e.g. via the energy scan method, the
precise determination of the luminosity is mandatory.
For this purpose, the PANDA luminosity detector will measure the
2D angular distribution of the elastically scattered antiproton trajectories.
For the determination of the luminosity the parametrization of
the differential cross section in dependence on the scattering angle is
fitted to the measured angular distribution. The fit function is highly
complex as it is not only able to corrected for the detection efficiency
and resolution, but also the antiproton beam shift, spotsize, tilt and
divergence. As most of these parameters are extracted from the fit,
this method is extremely powerful as it delivers also beam properties.
This poster will cover the complete luminosity determination procedure,
which is capable of extracting the luminosity with an accuracy
in the permille level.