Publications by authors named "Brendan Crill"
Article Synopsis
- The text discusses the cryogenic half-wave plate rotation mechanisms developed for Spider, a telescope that studied the cosmic microwave background.
- These mechanisms function at extremely low temperatures and feature a compact design with a large clear aperture for optimal performance.
- A worm gear driven by a cryogenic stepper motor ensures precise adjustment and stability of the telescope's orientation, supported by an optical encoder for accurate angle monitoring.
We summarize the fabrication, flight qualification, and dark performance of bolometers completed at the Jet Propulsion Laboratory for the High Frequency Instrument (HFI) of the joint ESA/NASA Herschel/Planck mission to be launched in 2009. The HFI is a multicolor focal plane which consists of 52 bolometers operated at 100 mK. Each bolometer is mounted to a feedhorn-filter assembly which defines one of six frequency bands centered between 100-857 GHz.
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