Cosmology Large Angular Scale Surveyor (CLASS) Focal Plane Development
| Autor: | Kongpop U-Yen, Samuel H. Moseley, David T. Chuss, Kevin L. Denis, Charles L. Bennett, Gary Hinshaw, Rolando Dünner, Joseph Eimer, Gene C. Hilton, Johannes Hubmayr, Mark Halpern, Tobias A. Marriage, Mandana Amiri, Matthew Petroff, Duncan J. Watts, Karwan Rostem, Felipe Colazo, Dominik Gothe, Carl D. Reintsema, Zhilei Xu, Kathleen Harrington, Edward J. Wollack, Jeffrey Iuliano, John W. Appel, Nathan T. Miller, Aamir Ali, G. Mumby, Pedro Fluxa, Emily Wagner, Thomas Essinger-Hileman, Lingzhen Zeng |
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| Rok vydání: | 2015 |
| Předmět: |
Cosmology Large Angular Scale Surveyor
Cosmic microwave background FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology 01 natural sciences Optics Band-pass filter 0103 physical sciences General Materials Science 010306 general physics Instrumentation and Methods for Astrophysics (astro-ph.IM) Reionization Physics Stray light business.industry Astrophysics::Instrumentation and Methods for Astrophysics Single-mode optical fiber 021001 nanoscience & nanotechnology Condensed Matter Physics Polarization (waves) Atomic and Molecular Physics and Optics Cardinal point Astrophysics - Instrumentation and Methods for Astrophysics 0210 nano-technology business |
| Zdroj: | Journal of Low Temperature Physics. 184:759-764 |
| ISSN: | 1573-7357 0022-2291 |
| DOI: | 10.1007/s10909-015-1368-9 |
| Popis: | The Cosmology Large Angular Scale Surveyor (CLASS) will measure the polarization of the Cosmic Microwave Background to search for and characterize the polarized signature of inflation. CLASS will operate from the Atacama Desert and observe $\sim$70% of the sky. A variable-delay polarization modulator (VPM) modulates the polarization at $\sim$10 Hz to suppress the 1/f noise of the atmosphere and enable the measurement of the large angular scale polarization modes. The measurement of the inflationary signal across angular scales that span both the recombination and reionization features allows a test of the predicted shape of the polarized angular power spectra in addition to a measurement of the energy scale of inflation. CLASS is an array of telescopes covering frequencies of 38, 93, 148, and 217 GHz. These frequencies straddle the foreground minimum and thus allow the extraction of foregrounds from the primordial signal. Each focal plane contains feedhorn-coupled transition-edge sensors that simultaneously detect two orthogonal linear polarizations. The use of single-crystal silicon as the dielectric for the on-chip transmission lines enables both high efficiency and uniformity in fabrication. Integrated band definition has been implemented that both controls the bandpass of the single mode transmission on the chip and prevents stray light from coupling to the detectors. Comment: 7 pages, 5 figures, accepted by the Journal of Low Temperature Physics |
| Databáze: | OpenAIRE |
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