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Title: Multilayer mirror-based soft x-ray polarimeter for astronomical observations
Authors: Panini, S. S
Sreekumar, P
Marshall, H. L
Narendranath, S
Nayak, M
Athiray, P. S
Keywords: Multilayer mirrors;Soft x-rays;Polarimeter
Issue Date: Jan-2018
Publisher: SPIE-The International Society for Optical Engineering
Citation: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 3, No. 4, pp. 011002-1 - 011002-9
Abstract: A simple design of a soft x-ray polarimeter using multilayer mirrors is presented. A multilayer mirror acts as a linear polarization analyzer for x-rays at incidence angles close to the Brewster angle. The instrument consists of an x-ray concentrator, a set of multilayer mirrors placed at 45 deg from the optical axis, and a detector at Nasmyth focus. The instrument rotating about its optical axis during observations can measure the linear polarization of 0.2- to 0.7-keV x-rays from astronomical sources. The use of a soft x-ray concentrator with geometrical area ∼ 630 cm2 provides sufficient sensitivity to address key scientific questions. Five different multilayer mirrors placed on a rotating wheel provide the option to measure polarization in any of the five narrow bands spanning the 0.2- to 0.7-keV range. Design and estimated performance of the design are discussed.
Description: Restricted Access
ISSN: 2329-4221
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Appears in Collections:IIAP Publications

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