2/28/2024 0 Comments Compton scattering in x rayKrawczynski, Design and performance of the x-ray polarimeter X-Calibur. Tosi, Study of the radiation damage of silicon photo-multipliers at the GELINA facility. Pillet, Polarizing properties of grazing-incidence x-ray mirrors: comment. Collaboration, Geant4-a simulation toolkit. Yamamoto, XL-Calibur – a second-generation balloon-borne hard X-ray polarimetry mission. Wilson-Hodge, Observations of a GX 301–2 Apastron Flare with the X-Calibur Hard X-Ray Polarimeter Supported by NICER, the Swift XRT and BAT, and Fermi GBM. In this chapter we introduce the basic formalism of the Compton effect we describe the design schemes developed so far for scattering polarimeters, including both the single-phase and dual-phase approaches we overview the calibration methods to reduce the systematic effects and we describe sources of background which affect the measurements. X-ray polarimetry requires much higher statistics than, e.g., spectrometry or timing thus systematic effects must be accurately measured and accounted for. Different designs have been studied and adopted, and current instruments are predominantly with sensors based on scintillation or solid-state detectors. Depending on the materials used to detect these two interactions, the Compton polarimeter can be classified as single-phase (same material for scattering and absorption detectors) or dual-phase (different materials). Photons may undergo two interactions in the sensitive volume of the instrument, i.e., a scattering followed by an absorption. This property can be exploited to design instruments to measure the linear polarization of hard X-rays (∼10–100 keV). Photons preferentially Compton scatter perpendicular to the plane of polarization.
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