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Proceedings Paper

The Primordial Inflation Explorer (PIXIE)
Author(s): Alan Kogut; David T. Chuss; Jessie Dotson; Eli Dwek; Dale J. Fixsen; Mark Halpern; Gary F. Hinshaw; Stephan Meyer; S. Harvey Moseley; Michael D. Seiffert; David N. Spergel; Edward J. Wollack
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Paper Abstract

The Primordial Inflation Explorer is an Explorer-class mission to measure the gravity-wave signature of primordial inflation through its distinctive imprint on the linear polarization of the cosmic microwave background. PIXIE uses an innovative optical design to achieve background-limited sensitivity in 400 spectral channels spanning 2.5 decades in frequency from 30 GHz to 6 THz (1 cm to 50 micron wavelength). Multi-moded non-imaging optics feed a polarizing Fourier Transform Spectrometer to produce a set of interference fringes, proportional to the difference spectrum between orthogonal linear polarizations from the two input beams. Multiple levels of symmetry and signal modulation combine to reduce the instrumental signature and confusion from unpolarized sources to negligible levels. PIXIE will map the full sky in Stokes I, Q, and U parameters with angular resolution 2.6 deg and sensitivity 0.2 µK per 1 deg square pixel. The principal science goal is the detection and characterization of linear polarization from an inflationary epoch in the early universe, with tensor-to-scalar ratio r < 10-3 at 5 standard deviations. In addition, PIXIE will measure the absolute frequency spectrum to constrain physical processes ranging from inflation to the nature of the first stars to the physical conditions within the interstellar medium of the Galaxy. We describe the PIXIE instrument and mission architecture with an emphasis on the expected level of systematic error suppression.

Paper Details

Date Published: 2 August 2014
PDF: 17 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91431E (2 August 2014); doi: 10.1117/12.2056840
Show Author Affiliations
Alan Kogut, NASA Goddard Space Flight Ctr. (United States)
David T. Chuss, NASA Goddard Space Flight Ctr. (United States)
Jessie Dotson, NASA Ames Research Ctr. (United States)
Eli Dwek, NASA Goddard Space Flight Ctr. (United States)
Dale J. Fixsen, NASA Goddard Space Flight Ctr. (United States)
Mark Halpern, The Univ. of British Columbia (Canada)
Gary F. Hinshaw, The Univ. of British Columbia (Canada)
Stephan Meyer, The Univ. of Chicago (United States)
S. Harvey Moseley, NASA Goddard Space Flight Ctr. (United States)
Michael D. Seiffert, Jet Propulsion Lab. (United States)
David N. Spergel, Princeton Univ. (United States)
Edward J. Wollack, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

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