研究目的
To measure the cosmic ray nuclei up to several tens of TeV or beyond and to serve as a veto detector for discriminating gamma-rays from charged particles.
研究成果
The PSD of DAMPE works very well, with almost all elements in cosmic rays from H to Fe clearly identified in the charge spectrum. The charge resolutions for some abundant elements are provided, indicating excellent performance for elemental analysis of cosmic ray flux.
研究不足
The quenching effect becomes more severe with increasing charge number, and the charge resolution may be influenced by the odd-even effect for low abundant odd-Z elements.
1：Experimental Design and Method Selection:
The charge reconstruction procedure includes track finding, alignment of PSD, light attenuation correction, quenching and equalization correction.
2：Sample Selection and Data Sources:
Proton MIP events are used for alignment correction and light attenuation correction.
3：List of Experimental Equipment and Materials:
The Plastic Scintillator Detector (PSD) of DAMPE, composed of two planes with 41 PSD bars each, viewed by photomultiplier tubes (PMTs).
4：Experimental Procedures and Operational Workflow:
The procedure involves determining the impact position and path length, applying light attenuation correction, and performing equalization and quenching corrections.
5：Data Analysis Methods:
The charge spectrum is obtained by collecting the charge values of a large number of particles, with peaks fitted by Gaussian or Landau distribution functions.
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