PIQUE: Princeton I Q U Experiment

The PIQUE experiment  made observations of the CMB polarization from the roof of the physics department,
in Princeton, NJ in the winters of 1999-2000, and 2000-2001, using a W-band HEMT-based correlation polarimeter.

 Below are two pictures of the PIQUE experiment with part of the
group (Denis Barkats, Suzanne Staggs, Jeff McMahon, and Matt Hedman) in
front of the ground screen, and of the instrument inside the ground
screens.  In the second,  the 1.2~m parabolic mirror is on the left and
the cryostat is buried in the aluminum frame on the right.  Not shown here
are Bruce Winstein, Josh Gundersen, and numerous undergraduate students.


The PIQUE picture archive is online



The results from PIQUE are published in  three papers:
        -"A Limit on the Polarized Anisotropy of the Cosmic Microwave Background at Subdegree Angular Scales"
 Hedman, Barkats, Gundersen,  Staggs, Winstein, Astrophys.J. 548 (2001) L111-L114
           -
"New Limits on the Polarized Anisotropy of the Cosmic Microwave Background at Subdegree Angular Scales"
  Hedman, Barkats, Gundersen, McMahon, Staggs, Winstein, submitted to Astrophysical Journal Letters
        -"First attempt at measuring the CMB cross-polarization"
de Oliveira-Costa, Tegmark, Zaldarriaga, Barkats, Gundersen, Hedman, Staggs & Winstein 2002, Submitted to Phys.  Rev. D.

and a more detailed description can be found in  Matt Hedman's Ph.D thesis,  "The Princeton IQU experiment and constraints on the Polarization of the CMB at 90 GHz".  A more complete  publication list is available here.


PIQUE has been replaced by a new experiement; CAPMAP. More information about this experiment is on the CAPMAP web site

page last updated by  D. Barkats, May, 4 2004.