QUaD
QUaD, an acronym for
QUEST at DASI, was a ground-based
cosmic microwave background (CMB)
polarization experiment at the
South Pole.
QUEST (
Q and U Extragalactic Sub-mm Telescope) was the original name attributed to the
bolometer detector instrument, while
DASI is a famous CMB
interferometry experiment credited with the first detection of CMB polarization. QUaD used the existing DASI mechanical infrastructure but replaced the DASI interferometric array with a bolometer detector at the end of a
cassegrain optical system. The mount has housed the
Keck Array since 2011.
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