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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2003
DTSTART:20110127T220000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T134422Z
LAST-MODIFIED:20110122T194424Z
LOCATION:4274 Chamberlin Hall
SUMMARY:New CMB Polarization Results from QUIET at 43-GHz\, NPAC (Nucl
 ear/Particle/Astro/Cosmo) Forum\, Immanuel Buder\, University of Chica
 go
DESCRIPTION:Inflationary cosmology postulates that the Universe underw
 ent a period of accelerated expansion in the first 10^-30 s after the 
 Big Bang. Inflationary models are attractive because they solve outsta
 nding problems in cosmology: the origin of structure\, the absence of 
 monopoles\, and the horizon and flatness problems.  Although inflation
  is consistent with existing data\, the fundamental physics responsibl
 e for it is unknown.  Cosmic Microwave Background (CMB) measurements p
 romise to verify one of the predictions of inflation: odd-parity polar
 ization modes (B modes).<br>
\n<br>
\nCMB B modes have not yet been de
 tected. The Q/U Imaging ExperimenT (QUIET) recently reported a measure
 ment of the CMB polarization at 43-GHz (Q band).  This is one of the b
 est limits to date on inflationary B modes. Moreover the unique QUIET 
 design leads to the lowest levels of systematic contamination in the i
 nflationary signal reported by any CMB polarization experiment.<br>
\n
 <br>
\nI will describe the QUIET instrument\, how it mitigates systema
 tic contamination\, and results from the first season of Q-band observ
 ation. I will also report the status of analysis of the second-season 
 95-GHz (W-band) data.
URL:https://www.physics.wisc.edu/events/?id=2003
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