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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
The Atacama B-mode Search: Cosmology at 17,000 Feet
Date: Thursday, February 11th
Time: 2:30 pm
Place: 5280 Chamberlin Hall
Speaker: Sara Simon, Princeton
Abstract: The Atacama B-mode Search (ABS) was a crossed-Dragone telescope located at an elevation of 5200 m in the Atacama Desert in Chile that observed the cosmic microwave background (CMB) from February 2012 until October 2014. ABS was a pathfinder experiment that searched for the primordial B-mode polarization signal at large angular scales from multipole moments of l~40 to l~500, where it is expected to peak. The ABS focal plane consisted of 240 pixels sensitive to 145 GHz, each containing two transition-edge sensor bolometers coupled to orthogonal polarizations. Cold optics and an ambient temperature, rapidly-rotating half-wave plate made the ABS instrument unique. I will discuss the ABS instrument and its contributions to the field of CMB cosmology.
Host: Kam Arnold
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