The Hard X-ray Polarimeter X-Calibur - Design and Tests

Details The Hard X-ray Polarimeter X-Calibur - Design and Tests The Hard X-ray Polarimeter X-Calibur - Design and Tests

2011-09-30

arxiv.org/abs/1109.6850v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

2011 Fermi Symposium proceedings - eConf C110509

Scientific paper

X-ray polarimetry promises to give new information about high-energy astrophysical sources, such as binary black hole systems, micro-quasars, active galactic nuclei, and gamma-ray bursts. We designed, built and tested a hard X-ray polarimeter X-Calibur to be used in the focal plane of the InFOCuS grazing incidence hard X-ray telescope. X-Calibur combines a low-Z Compton scatterer with a CZT detector assembly to measure the polarization of 10-80 keV X-rays making use of the fact that polarized photons Compton scatter preferentially perpendicular to the electric field orientation. X-Calibur achieves a high detection efficiency of order unity.

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