Internal alignment and position resolution of the silicon tracker of DAMPE determined with orbit data

Abstract

The DArk Matter Particle Explorer (DAMPE) is a space-borne particle detector designed to probe electrons and gamma-rays in the few GeV to 10 TeV energy range, as well as cosmic-ray proton and nuclei components between 10 GeV and 100 TeV. The silicon-tungsten tracker-converter is a crucial component of DAMPE. It allows the direction of incoming photons converting into electron-positron pairs to be estimated, and the trajectory and charge (Z) of cosmic-ray particles to be identified. It consists of 768 silicon micro-strip sensors assembled in 6 double layers with a total active area of 6.6 m${}^2$. Silicon planes are interleaved with three layers of tungsten plates, resulting in about one radiation length of material in the tracker. Internal alignment parameters of the tracker have been determined on orbit, with non-showering protons and helium nuclei. We describe the alignment procedure and present the position resolution and alignment stability measurements.

References in corpus (4)

• The DArk Matter Particle Explorer mission
• DAMPE silicon tracker on-board data compression algorithm
• Design of the readout electronics for the DAMPE Silicon Tracker detector
• Offline software for the DAMPE experiment

Cited by in corpus (19)

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• Dark Matter Particle Explorer observations of high-energy cosmic ray electrons plus positrons and their physical implications
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• Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission
• A neural network classifier for electron identification on the DAMPE experiment
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• Search for relativistic fractionally charged particles in space
• Boresight Alignment of DArk Matter Particle Explorer
• Study of the Global Alignment for the DAMPE Detector
• Hadronic cross section measurements with the DAMPE space mission using 20GeV-10TeV cosmic-ray protons and ${}^4$He
• PSF Calibration of DAMPE for gamma-ray Observations
• Investigation of hadronic cross sections of cosmic ray carbon and oxygen on BGO from 200 GeV to 10 TeV energy at the DAMPE experiment