QUaD

QUaD,[1] 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.

QUaD
A photograph of the QUaD telescope inside its groundshield taken from a crane above the telescope.
Alternative namesQUEST at DASI
Part ofAmundsen–Scott South Pole Station 
Location(s)Antarctic Treaty area
Coordinates90°00′S 139°16′W
Telescope stylecosmic microwave background experiment
radio telescope 
Location of QUaD
Related media on Wikimedia Commons

See also
  • Cosmic microwave background radiation
  • Cosmic microwave background experiments

References
  1. QUaD collaboration (2008). "First season QUaD CMB temperature and polarization power spectra". The Astrophysical Journal. 674 (2008): 22–28. arXiv:0705.2359. Bibcode:2008ApJ...674...22A. doi:10.1086/524922.
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