Polarization Degree and Direction Angle Effects on a CdZnTe Focal Plane Performance

摘要: To date in astrophysics, X- and gamma-ray source emissions have been studied almost exclusively through imaging techniques, spectral- timing-variability analysis. However, often two or more distinct models potentially describe the same observations of a particular celestial-radiation source. By measuring angle degree linear polarization detected radiation, it is increased by number observational parameters thereby allowing better discrimination between different models. Therefore, future $\gamma$ -ray-telescope instrumentation should include capability to perform highly sensitive polarimetric measurements. This idea has recently become even important from perspective new very hard soft focusing missions based on Laue lenses such as Gamma-Ray Imager DUAL missions, submitted ESA Cosmic Vision calls. In order optimize design telescope focal plane, CdZnTe detector prototype tested at European Synchrotron Radiation Facility under ${\sim}100\hbox{\%}$ polarized beam. The was 5 mm thick array with segmented anodes into 16 $\,\times\,$ pixels 2.5 $^{2}$ . aim these tests study performance this function state synchrotron particular, we determined sensitivity level beam well its potential determine orientation performing measurements direction angles. both showed good linearity response levels down 50% angular resolution than $^{\circ}$