Study of the performances of the DAMPE silicon-tungsten tracker after five years of mission

DAMPE (DArk Matter Particle Explorer) is a satellite-based experiment launched in December 2015 and smoothly taking data after five years of mission. The Silicon-Tungsten Tracker (STK) characterized by 6 double layers silicon micro-strip detectors, for total detection area 7 m 2 , three 1 mm thick tungsten plates, placed the mechanical support structure, aimed to photon conversion e ± pairs. STK has role: precise reconstruction track charged particles with spatial resolution around 40 μ most incident angles incoming particles, identification charge cosmic rays. performances are excellent continuous operation space: this contribution in-orbit calibration during whole mission will be presented.