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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3928
DTSTART:20160211T203000Z
DTEND:20160211T210000Z
DTSTAMP:20260422T103645Z
LAST-MODIFIED:20160203T164926Z
LOCATION:5280 Chamberlin Hall
SUMMARY:The Atacama B-mode Search: Cosmology at 17\,000 Feet\, NPAC (N
 uclear/Particle/Astro/Cosmo) Forum\, Sara Simon\, Princeton
DESCRIPTION:The Atacama B-mode Search (ABS) was a crossed-Dragone tele
 scope located at an elevation of 5200 m in the Atacama Desert in Chile
  that observed the cosmic microwave background (CMB) from February 201
 2 until October 2014. ABS was a pathfinder experiment that searched fo
 r the primordial B-mode polarization signal at large angular scales fr
 om 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\, eac
 h containing two transition-edge sensor bolometers coupled to orthogon
 al polarizations. Cold optics and an ambient temperature\, rapidly-rot
 ating half-wave plate made the ABS instrument unique. I will discuss t
 he ABS instrument and its contributions to the field of CMB cosmology.
URL:https://www.physics.wisc.edu/events/?id=3928
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