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A small satellite version of a soft x-ray polarimeter

Marshall, Herman L. and Heine, Sarah N. T. and Garner, Alan and Gullikson, Eric M. and Günther, H. Moritz and Leitz, Christopher and Masterson, Rebecca and Miller, Eric D. and Zhang, William and Boissay-Malaquin, Rozenn and Caiazzo, Ilaria and Chakrabarty, Deepto and Davidson, Rosemary and Gallo, Luigi C. and Heilmann, Ralf K. and Heyl, Jeremy and Kara, Erin and Marscher, Alan and Schulz, Norbert S. (2020) A small satellite version of a soft x-ray polarimeter. In: Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. Proceedings of SPIE. No.11444. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114442Y. ISBN 9781510636750.

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We describe a new implementation of a broad-band soft X-ray polarimeter, substantially based on a previous design. This implementation, the Pioneer Soft X-ray Polarimeter (PiSoX) is a SmallSat, designed for NASA’s call for Astrophysics Pioneers, small missions that could be CubeSats, balloon experiments, or SmallSats. As in REDSoX, the grating arrangement is designed optimally for the purpose of polarimetry with broad-band focussing optics by matching the dispersion of the spectrometer channels to laterally graded multilayers (LGMLs). The system can achieve polarization modulation factors over 90%. For PiSoX, the optics are lightweight Si mirrors in a one-bounce parabolic configuration. High efficiency, blazed gratings from opposite sectors are oriented to disperse to a LGML forming a channel covering the wavelength range from 35 Å to 75 Å (165 - 350 eV). Upon satellite rotation, the intensities of the dispersed spectra, after reflection and polarizing by the LGMLs, give the three Stokes parameters needed to determine a source’s linear polarization fraction and orientation. The design can be extended to higher energies as LGMLs are developed further. We describe examples of the potential scientific return from instruments based on this design.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Zhang, William0000-0002-1426-9698
Caiazzo, Ilaria0000-0002-4770-5388
Chakrabarty, Deepto0000-0001-8804-8946
Heyl, Jeremy0000-0001-9739-367X
Kara, Erin0000-0003-0172-0854
Marscher, Alan0000-0001-7396-3332
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). Support for this work was provided in part through NASA grants 80NSSC20K1249, NNH18ZDA001N, and NNX15AL14G. Laboratory supplies and equipment were funded in part through the MIT Kavli Research Investment Fund. Support for this work was also provided in part through NASA grant NNX17AG43G and Smithsonian Astrophysical Observatory (SAO) contract SV3-73016 to MIT for support of the Chandra X-Ray Center (CXC), which is operated by SAO for and on behalf of NASA under contract NAS8-03060.
Funding AgencyGrant Number
Massachusetts Institute of Technology (MIT)UNSPECIFIED
Smithsonian Astrophysical ObservatorySV3-73016
Subject Keywords:X-ray, polarimeter, astronomy, multilayer, mirror, grating
Series Name:Proceedings of SPIE
Issue or Number:11444
Record Number:CaltechAUTHORS:20201217-143533333
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Official Citation:Herman L. Marshall, Sarah N. T. Heine, Alan Garner, Eric M. Gullikson, H. Moritz Günther, Christopher Leitz, Rebecca Masterson, Eric D. Miller, William Zhang, Rozenn Boissay Malaquin, Ilaria Caiazzo, Deepto Chakrabarty, Rosemary Davidson, Luigi C. Gallo, Ralf K. Heilmann, Jeremy Heyl, Erin Kara, Alan Marscher, and Norbert S. Schulz "A small satellite version of a soft x-ray polarimeter", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114442Y (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107169
Deposited By: Tony Diaz
Deposited On:17 Dec 2020 22:59
Last Modified:16 Nov 2021 19:00

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