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Dichroic Filters For Astronomical X-Ray Polarimetry

Bannister, N. P., Harris, Kenneth David Maclean ORCID:, Collins, S. P., Martindale, A., Monks, P. S., Solan, G. and Fraser, G. W. 2006. Dichroic Filters For Astronomical X-Ray Polarimetry. Experimental Astronomy 21 (1) , pp. 1-12. 10.1007/s10686-006-9054-1

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We describe a programme of research to investigate materials which exhibit linear dichroism at X-ray wavelengths, and to assess their potential as astronomical X-ray polarimeters. The availability of polarising filters for X-rays would offer an efficient method of quantifying the polarisation of X-ray radiation from distant, cosmic sources. A polarising dichroic filter is expected to be a compact, low mass device which could add polarimetry capability to an instrument by being introduced into the optical path ahead of a detector. We provide estimates of sensitivity in the context of the proposed XEUS observatory, which compare favourably with those for the most promising alternative technology. We also discuss a number of astrophysical sources which are suited to polarimetric study at discrete energies offered by the X-ray dichroic filter design.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Instrumentation . X-ray polarimetry . X-ray dichroism
Publisher: Springer
ISSN: 0922-6435
Last Modified: 18 Oct 2022 13:25

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