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The Use of Laterally Graded Multilayer Mirrors for Soft X-ray Polarimetry
| Content Provider | CiteSeerX |
|---|---|
| Author | Gettya, Dan Blaked, Eric M. Gulliksonc Eric Marshalla, Herman L. Schulza, Norbert S. Mcinturffe, Zane Windtb, David L. |
| Abstract | We present continued development of laterally graded multilayer mirrors (LGMLs) for a telescope design capable of measuring linear X-ray polarization over a broad spectral band. The multilayer-coated mirrors are used as Bragg reflectors at the Brewster angle. By matching to the dispersion of a spectrometer, one may take advantage of high multilayer reflectivities and achieve modulation factors over 50 % over the entire 0.2-0.8 keV band. In Phase II of the polarimetry beam-line development, we demonstrated that the system provides 100 % polarized X-rays at 0.525 keV (Marshall et al. 2013). Here, we present results from phase III of our development, where a LGML is used at the source and laterally manipulated in order to select and polarize X-rays from emission lines for a variety of source anodes. The beam-line will then provide the capability to test polarimeter components across the 0.15-0.70 keV band. We also present plans for a suborbital rocket experiment designed to detect a polarization level of better than 10 % for an active galactic nucleus. |
| File Format | |
| Access Restriction | Open |
| Content Type | Text |
