On-orbit calibration and long-term performance of the DAMPE trigger system
Authors:
Preprint
Abstract
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne particle detector for measurements of high-energy cosmic rays and γ-rays. DAMPE has been operating smoothly in space for more than 8 years since launch on December 17, 2015. The trigger logic of DAMPE is designed according to the deposited energy information recorded by the calorimeter. The precise calibration of the trigger thresholds and their long-term evolutions are very important for the scientific analysis of DAMPE. In this work, we develop a new method for the threshold calibration, considering the influence from the electronic noise, and obtain the long-term evolutions of the trigger thresholds. The average increase rate of the trigger thresholds for the first 4 layers of the calorimeter is found to be about 0.9% per year, resulting in variations of the high-energy trigger efficiency of cosmic ray electrons by about -5% per year at 2 GeV and less than about -0.05% above 30 GeV.Keywords
All Related Versions
This publication has 23 references indexed in Scilit:
- Search for gamma-ray spectral lines with the DArk Matter Particle ExplorerScience Bulletin, 2022
- The on-orbit calibration of DArk Matter Particle ExplorerAstroparticle Physics, 2019
- Charge measurement of cosmic ray nuclei with the plastic scintillator detector of DAMPEAstroparticle Physics, 2019
- Internal alignment and position resolution of the silicon tracker of DAMPE determined with orbit dataNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2018
- Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positronsNature, 2017
- The DArk Matter Particle Explorer missionAstroparticle Physics, 2017
- The plastic scintillator detector for DAMPEAstroparticle Physics, 2017
- The calibration and electron energy reconstruction of the BGO ECAL of the DAMPE detectorNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016
- Recent developments in Geant4Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016
- The DAMPE silicon–tungsten trackerNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016