Study of the Global Alignment for the DAMPE Detector

TL;DR

This paper presents a global alignment method for the DAMPE detector's sub-components, ensuring precise particle trajectory measurement crucial for cosmic-ray and gamma-ray detection.

Contribution

It introduces a novel global alignment technique to validate sub-detector displacement and improve track reconstruction accuracy for DAMPE.

Findings

Successful validation of sub-detector alignment

Enhanced accuracy in particle trajectory reconstruction

Agreement between flight data and simulations

Abstract

The Dark Matter Particle Explorer (DAMPE) is designed as a high energy particle detector for probing cosmic-rays and $\gamma-$rays in a wide energy range. The trajectory of the incident particle is mainly measured by the Silicon-Tungsten tracKer-converter (STK) sub-detector, which heavily depends on the precise internal alignment correction as well as the accuracy of the global coordinate system. In this work, we carried out a global alignment method to validate the potential displacement of these sub-detectors, and particularly demonstrated that the track reconstruction of STK can well satisfy the required objectives by means of comparing flight data and simulations.