학술논문
The Primordial Inflation Polarization Explorer (PIPER)
Document Type
Working Paper
Author
Gandilo, Natalie N.; Ade, Peter A. R.; Benford, Dominic; Bennett, Charles L.; Chuss, David T.; Dotson, Jessie L.; Eimer, Joseph R.; Fixsen, Dale J.; Halpern, Mark; Hilton, Gene; Hinshaw, Gary F.; Irwin, Kent; Jhabvala, Christine; Kimball, Mark; Kogut, Alan; Lowe, Luke; McMahon, Jeff J.; Miller, Timothy M.; Mirel, Paul; Moseley, S. Harvey; Pawlyk, Samuel; Rodriguez, Samelys; Sharp III, Elmer; Shirron, Peter; Staguhn, Johannes G.; Sullivan, Dan F.; Switzer, Eric R.; Taraschi, Peter; Tucker, Carole E.; Wollack, Edward J.
Source
Subject
Language
Abstract
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 32x40 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.
Comment: 8 pages, 6 figures. To be published in Proceedings of SPIE Volume 9914. Presented at SPIE Astronomical Telescopes + Instrumentation 2016, conference 9914
Comment: 8 pages, 6 figures. To be published in Proceedings of SPIE Volume 9914. Presented at SPIE Astronomical Telescopes + Instrumentation 2016, conference 9914