Heart of the X-Calibur X-Ray Polarimeter (IMAGE) World Scientific Caption The X-ray beam enters the scattering slab (blueish glow) from the top. The X-rays are scattered in the slab with a scattering distribution characteristic depending on the polarization properties of the incoming beam. The scattering distribution is measured with semiconductor X-ray detectors surrounding the scattering slab on all four sides. The digitized signals are received through the readout electronics that are attached at the back-side of each detector. Credit JAI Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.