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Proceedings Paper

The Primordial Inflation Polarization Explorer (PIPER)
Author(s): David T. Chuss; Peter A. R. Ade; Dominic J. Benford; Charles L. Bennett; Jessie L. Dotson; Joseph R. Eimer; Dale J. Fixsen; Mark Halpern; Gene Hilton; James Hinderks; Gary Hinshaw; Kent Irwin; Michael L. Jackson; Muzariatu A. Jah; Nikhil Jethava; Christine Jhabvala; Alan J. Kogut; Luke Lowe; Nuala McCullagh; Timothy Miller; Paul Mirel; S. Harvey Moseley; Samelys Rodriguez; Karwan Rostem; Elmer Sharp; Johannes G. Staguhn; Carole E. Tucker; George M. Voellmer; Edward J. Wollack; Lingzhen Zeng
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Paper Abstract

The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne instrument designed to search for the faint signature of inflation in the polarized component of the cosmic microwave background (CMB). Each flight will be configured for a single frequency, but in order to aid in the removal of the polarized foreground signal due to Galactic dust, the filters will be changed between flights. In this way, the CMB polarization at a total of four different frequencies (200, 270, 350, and 600 GHz) will be measured on large angular scales. PIPER consists of a pair of cryogenic telescopes, one for measuring each of Stokes Q and U in the instrument frame. Each telescope receives both linear orthogonal polarizations in two 32 × 40 element planar arrays that utilize Transition-Edge Sensors (TES). The first element in each telescope is a variable-delay polarization modulator (VPM) that fully modulates the linear Stokes parameter to which the telescope is sensitive. There are several advantages to this architecture. First, by modulating at the front of the optics, instrumental polarization is unmodulated and is therefore cleanly separated from source polarization. Second, by implementing this system with the appropriate symmetry, systematic effects can be further mitigated. In the PIPER design, many of the systematics are manifest in the unmeasured linear Stokes parameter for each telescope and thus can be separated from the desired signal. Finally, the modulation cycle never mixes the Q and U linear Stokes parameters, and thus residuals in the modulation do not twist the observed polarization vector. This is advantageous because measuring the angle of linear polarization is critical for separating the inflationary signal from other polarized components.

Paper Details

Date Published: 15 July 2010
PDF: 11 pages
Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411P (15 July 2010); doi: 10.1117/12.857119
Show Author Affiliations
David T. Chuss, NASA Goddard Space Flight Ctr. (United States)
Peter A. R. Ade, Cardiff Univ. (United Kingdom)
Dominic J. Benford, NASA Goddard Space Flight Ctr. (United States)
Charles L. Bennett, The Johns Hopkins Univ. (United States)
Jessie L. Dotson, NASA Ames Research Ctr. (United States)
Joseph R. Eimer, The Johns Hopkins Univ. (United States)
Dale J. Fixsen, NASA Goddard Space Flight Ctr. (United States)
Mark Halpern, The Univ. of British Columbia (Canada)
Gene Hilton, National Institute of Standards and Technology (United States)
James Hinderks, NASA Goddard Space Flight Ctr. (United States)
Gary Hinshaw, NASA Goddard Space Flight Ctr. (United States)
Kent Irwin, National Institute of Standards and Technology (United States)
Michael L. Jackson, NASA Goddard Space Flight Ctr. (United States)
Muzariatu A. Jah, NASA Goddard Space Flight Ctr. (United States)
Nikhil Jethava, NASA Goddard Space Flight Ctr. (United States)
Global Systems Technology (United States)
Christine Jhabvala, NASA Goddard Space Flight Ctr. (United States)
Alan J. Kogut, NASA Goddard Space Flight Ctr. (United States)
Luke Lowe, NASA Goddard Space Flight Ctr. (United States)
Nuala McCullagh, The Johns Hopkins Univ. (United States)
Timothy Miller, NASA Goddard Space Flight Ctr. (United States)
Paul Mirel, NASA Goddard Space Flight Ctr. (United States)
S. Harvey Moseley, NASA Goddard Space Flight Ctr. (United States)
Samelys Rodriguez, NASA Goddard Space Flight Ctr. (United States)
Karwan Rostem, NASA Goddard Space Flight Ctr. (United States)
Elmer Sharp, NASA Goddard Space Flight Ctr. (United States)
Global Systems Technology (United States)
Johannes G. Staguhn, NASA Goddard Space Flight Ctr. (United States)
The Johns Hopkins Univ. (United States)
Carole E. Tucker, Cardiff Univ. (United Kingdom)
George M. Voellmer, NASA Goddard Space Flight Ctr. (United States)
Edward J. Wollack, NASA Goddard Space Flight Ctr. (United States)
Lingzhen Zeng, The Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 7741:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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