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In-Orbit Instrument Performance Study and Calibration for POLAR Polarization Measurements
- Source :
- Nuclear Instruments and Methods in Physics Research. A, Vol. 900 (2018) pp. 8-24
- Publication Year :
- 2018
- Publisher :
- arXiv, 2018.
-
Abstract
- POLAR is a compact space-borne detector designed to perform reliable measurements of the polarization for transient sources like Gamma-Ray Bursts in the energy range 50-500keV. The instrument works based on the Compton Scattering principle with the plastic scintillators as the main detection material along with the multi-anode photomultiplier tube. POLAR has been launched successfully onboard the Chinese space laboratory TG-2 on 15th September, 2016. In order to reliably reconstruct the polarization information a highly detailed understanding of the instrument is required for both data analysis and Monte Carlo studies. For this purpose a full study of the in-orbit performance was performed in order to obtain the instrument calibration parameters such as noise, pedestal, gain nonlinearity of the electronics, threshold, crosstalk and gain, as well as the effect of temperature on the above parameters. Furthermore the relationship between gain and high voltage of the multi-anode photomultiplier tube has been studied and the errors on all measurement values are presented. Finally the typical systematic error on polarization measurements of Gamma-Ray Bursts due to the measurement error of the calibration parameters are estimated using Monte Carlo simulations.<br />Comment: 43 pages, 30 figures, 1 table; Preprint accepted by NIMA
- Subjects :
- Nuclear and High Energy Physics
Photomultiplier
Physics - Instrumentation and Detectors
Physics::Instrumentation and Detectors
Astrophysics::High Energy Astrophysical Phenomena
Monte Carlo method
FOS: Physical sciences
ddc:500.2
Scintillator
X-ray Polarization
01 natural sciences
High Energy Physics - Experiment
POLAR
In-orbit Calibration
High Energy Physics - Experiment (hep-ex)
Optics
0103 physical sciences
010306 general physics
010303 astronomy & astrophysics
Instrumentation
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Physics
Observational error
business.industry
Detector
Compton scattering
Monte Carlo Simulation
High voltage
Instrumentation and Detectors (physics.ins-det)
Polarization (waves)
Gamma-Ray Burst
ddc:520
business
Astrophysics - Instrumentation and Methods for Astrophysics
Subjects
Details
- ISSN :
- 01689002
- Database :
- OpenAIRE
- Journal :
- Nuclear Instruments and Methods in Physics Research. A, Vol. 900 (2018) pp. 8-24
- Accession number :
- edsair.doi.dedup.....c18ef0318c0ea5162fd91fa67f63183e
- Full Text :
- https://doi.org/10.48550/arxiv.1805.07605