QUaD

A photograph of the QUaD telescope inside its groundshield taken from a crane above the telescope.

QUaD,^[1] an acronym for QUEST at DASI, is a ground based cosmic microwave backrground (CMB) polarization experiment located 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 uses the existing DASI mechanical infrastructure but replaces the DASI interferometric array with a bolometer detector at the end of a cassegrain optical system.

See also

Wikimedia Commons has media related to QUaD.

• Cosmic microwave background radiation
• Cosmic microwave background experiments

References

External links

• http://www.stanford.edu/~schurch/quad.html
• http://find.uchicago.edu/quad/[]

Cosmic microwave background radiation (CMB)
Discovery of CMB radiation Timeline of CMB astronomy
Effects	Cosmic variance Diffusion damping Recombination Sachs–Wolfe effect Sunyaev–Zel'dovich effect Thomson scattering	9-year WMAP image (2012) of the CMB.
Experiments	Space COBE Planck RELIKT-1 WMAP Balloon Archeops ARCADE BOOMERanG EBEX MAXIMA QMAP Spider TopHat Ground ABS ACBAR ACT AMI AMiBA APEX ATCA BICEP BICEP2 BICEP3 BIMA CAPMAP CAT CBI CLASS COSMOSOMAS DASI Keck Array MAT OVRO POLARBEAR QUaD QUBIC QUIET QUIJOTE Saskatoon SPT SZA Tenerife VSA

Coordinates: 90°00′S 139°16′W / 90.000°S 139.267°W / -90.000; -139.267