Optimization of the final settings for the Space-borne Hard X-ray Compton Polarimeter POLAR
August 18, 2017
August 03, 2018
POLAR is a compact wide field space-borne detector dedicated for precise measurements of the linear polarization of hard
X-rays emitted by transient sources in the energy range from 50 keV to 500 keV.
It consists of 1600 plastic scintillator bars grouped in 25 detector modules that are used as gamma-ray detection material.
Its energy range sensitivity is optimized for detection of the prompt emission photons from the gamma-ray bursts.
Measurements of the GRB polarization provide unique information on emission mechanisms as
well as on composition and structure of the GRB jets.
POLAR instrument was developed by international collaboration of Switzerland, China and Poland.
It was launched in space on-board the China Space Laboratory TG-2 on September 15th, 2016.
Based on the ground calibration data, several high voltage and threshold settings were calculated and verified
in order to obtain various energy ranges and optimized signal to background conditions for different
measurement purposes. In this paper we present optimization procedure details and current test results.
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