Progress toward a soft x-ray polarimeter

Herman L. Marshall; Norbert S. Schulz; Brian Remlinger; Eric S. Gentry; David L. Windt; Eric M. Gullikson

doi:10.1117/12.2025727

26 September 2013 Progress toward a soft x-ray polarimeter

Herman L. Marshall, Norbert S. Schulz, Brian Remlinger, Eric S. Gentry, David L. Windt, Eric M. Gullikson

Proceedings Volume 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI; 88611D (2013) https://doi.org/10.1117/12.2025727
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

We are developing instrumentation for a telescope design capable of measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics. Multilayer-coated mirrors are key to this approach, being used as Bragg reflectors at the Brewster angle. By laterally grading the multilayer mirrors and 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. We present progress on laboratory work to demonstrate the capabilities of an existing laterally graded multilayer coated mirror pair. We also present plans for a suborbital rocket experiment designed to detect a polarization level of 12-17% for an active galactic nucleus in the 0.1-1.0 keV band.

Citation Download Citation

Herman L. Marshall, Norbert S. Schulz, Brian Remlinger, Eric S. Gentry, David L. Windt, and Eric M. Gullikson "Progress toward a soft x-ray polarimeter", Proc. SPIE 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI, 88611D (26 September 2013); https://doi.org/10.1117/12.2025727

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