19 July 2016 The Primordial Inflation Polarization Explorer (PIPER)
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The Primordial Inflation Polarization ExploreR (PIPER) is a balloon-borne telescope designed to measure the polarization of the Cosmic Microwave Background on large angular scales. PIPER will map 85% of the sky at 200, 270, 350, and 600 GHz over a series of 8 conventional balloon flights from the northern and southern hemispheres. The first science flight will use two 32 × 40 arrays of backshort-under-grid transition edge sensors, multiplexed in the time domain, and maintained at 100 mK by a Continuous Adiabatic Demagnetization Refrigerator. Front- end cryogenic Variable-delay Polarization Modulators provide systematic control by rotating linear to circular polarization at 3 Hz. Twin telescopes allow PIPER to measure Stokes I, Q, U , and V simultaneously. The telescope is maintained at 1.5 K in an LHe bucket dewar. Cold optics and the lack of a warm window permit sensitivity at the sky-background limit. The ultimate science target is a limit on the tensor-to-scalar ratio of r ∼ 0.007, from the reionization bump to l ∼ 300. PIPER’s first flight will be from the Northern hemisphere, and overlap with the CLASS survey at lower frequencies. We describe the current status of the PIPER instrument.
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Natalie N. Gandilo, Natalie N. Gandilo, Peter A. R. Ade, Peter A. R. Ade, Dominic Benford, Dominic Benford, Charles L. Bennett, Charles L. Bennett, David T. Chuss, David T. Chuss, Jessie L. Dotson, Jessie L. Dotson, Joseph R. Eimer, Joseph R. Eimer, Dale J. Fixsen, Dale J. Fixsen, Mark Halpern, Mark Halpern, Gene Hilton, Gene Hilton, Gary F. Hinshaw, Gary F. Hinshaw, Kent Irwin, Kent Irwin, Christine Jhabvala, Christine Jhabvala, Mark Kimball, Mark Kimball, Alan Kogut, Alan Kogut, Luke Lowe, Luke Lowe, Jeff J. McMahon, Jeff J. McMahon, Timothy M. Miller, Timothy M. Miller, Paul Mirel, Paul Mirel, S. Harvey Moseley, S. Harvey Moseley, Samuel Pawlyk, Samuel Pawlyk, Samelys Rodriguez, Samelys Rodriguez, Elmer Sharp, Elmer Sharp, Peter Shirron, Peter Shirron, Johannes G. Staguhn, Johannes G. Staguhn, Dan F. Sullivan, Dan F. Sullivan, Eric R. Switzer, Eric R. Switzer, Peter Taraschi, Peter Taraschi, Carole E. Tucker, Carole E. Tucker, Edward J. Wollack, Edward J. Wollack, } "The Primordial Inflation Polarization Explorer (PIPER)", Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99141J (19 July 2016); doi: 10.1117/12.2231109; https://doi.org/10.1117/12.2231109


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