1
|
Kusaka A, Essinger-Hileman T, Appel JW, Gallardo P, Irwin KD, Jarosik N, Nolta MR, Page LA, Parker LP, Raghunathan S, Sievers JL, Simon SM, Staggs ST, Visnjic K. Modulation of cosmic microwave background polarization with a warm rapidly rotating half-wave plate on the Atacama B-Mode Search instrument. Rev Sci Instrum 2014; 85:024501. [PMID: 24593374 DOI: 10.1063/1.4862058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We evaluate the modulation of cosmic microwave background polarization using a rapidly rotating, half-wave plate (HWP) on the Atacama B-Mode Search. After demodulating the time-ordered-data (TOD), we find a significant reduction of atmospheric fluctuations. The demodulated TOD is stable on time scales of 500-1000 s, corresponding to frequencies of 1-2 mHz. This facilitates recovery of cosmological information at large angular scales, which are typically available only from balloon-borne or satellite experiments. This technique also achieves a sensitive measurement of celestial polarization without differencing the TOD of paired detectors sensitive to two orthogonal linear polarizations. This is the first demonstration of the ability to remove atmospheric contamination at these levels from a ground-based platform using a rapidly rotating HWP.
Collapse
Affiliation(s)
- A Kusaka
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - T Essinger-Hileman
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - J W Appel
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - P Gallardo
- Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - K D Irwin
- National Institute of Standards and Technology, 325 Broadway MC 817.03, Boulder, Colorado 80305, USA and Department of Physics, Stanford University, Stanford, California 94305, USA
| | - N Jarosik
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - M R Nolta
- The Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Ontario M5S 3H8, Canada
| | - L A Page
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - L P Parker
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - S Raghunathan
- Department of Astronomy, Universidad de Chile, Santiago, Chile
| | - J L Sievers
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - S M Simon
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - S T Staggs
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| | - K Visnjic
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
| |
Collapse
|
2
|
Readhead ACS, Myers ST, Pearson TJ, Sievers JL, Mason BS, Contaldi CR, Bond JR, Bustos R, Altamirano P, Achermann C, Bronfman L, Carlstrom JE, Cartwright JK, Casassus S, Dickinson C, Holzapfel WL, Kovac JM, Leitch EM, May J, Padin S, Pogosyan D, Pospieszalski M, Pryke C, Reeves R, Shepherd MC, Torres S. Polarization Observations with the Cosmic Background Imager. Science 2004; 306:836-44. [PMID: 15472038 DOI: 10.1126/science.1105598] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Polarization observations of the cosmic microwave background with the Cosmic Background Imager from September 2002 to May 2004 provide a significant detection of the E-mode polarization and reveal an angular power spectrum of polarized emission showing peaks and valleys that are shifted in phase by half a cycle relative to those of the total intensity spectrum. This key agreement between the phase of the observed polarization spectrum and that predicted on the basis of the total intensity spectrum provides support for the standard model of cosmology, in which dark matter and dark energy are the dominant constituents, the geometry is close to flat, and primordial density fluctuations are predominantly adiabatic with a matter power spectrum commensurate with inflationary cosmological models.
Collapse
Affiliation(s)
- A C S Readhead
- Owens Valley Radio Observatory, California Institute of Technology, Pasadena, CA 91125, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|