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Title: Microwave Detectors; Sensors
Description: Micrograph of a prototype NIST detector that will be used to seek B-mode polarization, the signature of the rapid inflation of the universe after the Big Bang. Cosmic radiation will be received by the arrow-shaped antennas in the middle of the detector. The antennas separate the radiation into two different polarization directions at a frequency of 145 gigahertz. (All light has two polarization directions.) Finally, the radiation for each polarization will be converted to heat by transition-edge sensors (top and right sides of the image), which precisely measure the energy using a superconducting metal that changes resistance in response to heat. The resulting data will be mapped to identify the polarization patterns.

EEEL

See also http://www.nist.gov/pml/div686/aps_050209.cfm.
Subjects (names):
Topics/Categories: Electronics--Superconductors
Type: Photo/Color
Source: National Institute of Standards and Technology
Credit Line as it should
appear in print:
Credit: NIST
Date Created: 2009
Date Entered: 5/1/2009

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