The BGO electromagnetic calorimeter (ECAL) is one of the key sub-detectors of DAMPE for energy measurement of electromagnetic showers produced by e±/γ. In this paper, we developed a parameterized energy correction method for the electromagnetic showers based on the detailed MonteCarlo simulations. With detailed analysis, the lateral and longitudinal information of the electromagnetic shower development in ECAL is used to construct the correction function, simultaneously taking into account energy losses due to dead material and longitudinal energy leakage. The energy correction method shows no dependence on the primary energy or direction of incident particle. The results of this correction method applied to data from an electron beam test at CERN show encouraging improvements of the energy linearity and resolution. In principle, this correction method could be not only applied to DAMPE, but extended to any other experiment equipped with a electromagnetic calorimeter.

By with YUE CHUAN

Fig. The measured energy distributions before (blue) and after (red) correction for the normal-incident electron beams with certain energies from 5 GeV to 243 GeV. For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article

  This research work by Yu Chuan et al., has been published in Nuclear Inst. and Methods in Physics Research, A 856C (2017) pp. 11-16.

   For more details please see: http://www.sciencedirect.com/science/article/pii/S0168900217303406.