The Globe-Orbiting Soft X-Ray (GOSoX) Polarimeter Concept Study

被引：2

作者：

Marshall, Herman L. ^{[1
]}

Heine, Sarah ^{[1
]}

Davidson, Rosemary ^{[1
]}

Garner, Alan ^{[1
]}

Gullikson, Eric ^{[2
]}

Guenther, Moritz ^{[1
]}

Leitz, Christopher ^{[3
]}

Masterson, Rebecca ^{[1
]}

Miller, Eric ^{[1
]}

Stenzel, June S. ^{[1
]}

Zhang, William W. ^{[4
]}

Boissay-Malaquin, Rozenn ^{[4
,5
]}

Caiazzo, Ilaria ^{[6
]}

Chakrabarty, Deepto ^{[1
]}

Gallo, Luigi ^{[7
]}

Heilmann, Ralf K. ^{[1
]}

Heyl, Jeremy ^{[8
]}

Kara, Erin ^{[1
]}

Schulz, Norbert ^{[1
]}

机构：

[1] MIT, Kavli Inst, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] Lawrence Berkeley Natl Lab, Berkeley, CA USA

[3] MIT, Lincoln Lab, 244 Wood St, Lexington, MA 02173 USA

[4] Goddard Space Flight Ctr, Greenbelt, MD USA

[5] Univ Maryland Baltimore Cty, Baltimore, MD 21228 USA

[6] CALTECH, Pasadena, CA 91125 USA

[7] St Marys Univ, Halifax, NS, Canada

[8] Univ British Columbia, Vancouver, BC, Canada

来源：

OPTICS FOR EUV, X-RAY, AND GAMMA-RAY ASTRONOMY X | 2021年 / 11822卷

关键词：

X-ray; polarimeter; astronomy; multilayer; mirror; grating; FEATURES;

D O I：

10.1117/12.2596186

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe an implementation of a broad-band soft X-ray polarimeter, substantially based on previous designs. This implementation, the Globe-Orbiting Soft X-ray Polarimeter (GOSoX) is a SmallSat, designed for NASA's call for Astrophysics Science SmallSat Studies (AS(3)). As in a related mission concept PiSoX, the grating arrangement is designed optimally for the purpose of polarimetry with broad-band focussing optics by matching the dispersion of the spectrometer to a laterally graded multilayers (LGML). The system can achieve polarization modulation factors over 90%. For GOSoX, the optics are lightweight Si mirrors in a one-bounce parabolic configuration. Critical Angle Transmission (CAT) gratings from opposite sectors are oriented to disperse to a LGML forming a channel covering the wavelength range from 31 angstrom to 75 angstrom (165 - 400 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 the potential scientific return and traceability, proposed mission concept and design, and estimated mission costs, following the results of the JPL Team X concept study.

引用

页数：15

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