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Proceedings Article

EBEX: a balloon-borne CMB polarization experiment

[+] Author Affiliations
Britt Reichborn-Kjennerud, Daniel Chapman, Joy Didier, Seth Hillbrand, Michele Limon, Amber Miller

Columbia Univ. (USA)

Asad M. Aboobaker, Chaoyun Bao, Shaul Hanany, Terry Jones, Jeff Klein, Michael Milligan, Daniel Polsgrove, Kate Raach, Ilan Sagiv, Kyle Zilic

Univ. of Minnesota (USA)

Peter Ade, William Grainger, Enzo Pascale

Cardiff Univ. (United Kingdom)

François Aubin, Matt Dobbs, Kevin MacDermid, Graeme Smecher

McGill Univ. (Canada)

Carlo Baccigalupi, Sam Leach

Scuola Internazionale Superiore di Studi Avanzati (Italy)

Julian Borrill, Christopher Cantalupo, Theodore Kisner

Lawrence Berkeley National Lab. (USA)

Julien Grain, Nicolas Ponthieu

Univ. Paris-Sud (France)

Johannes Hubmayr

National Institute of Standards and Technology (USA)

Andrew Jaffe

Imperial College London (United Kingdom)

Bradley Johnson, Adrian Lee, Xiaofan Meng, Huan Tran

Univ. of California, Berkeley (USA)

Andrei Korotkov, Gregory S. Tucker, Yury Vinokurov

Brown Univ. (USA)

Lorne Levinson

Weizmann Institute of Science (Israel)

Tomotake Matsumura

California Institute of Technology (USA)

Federico Stivoli

Univ. Paris Sud (France)

Radek Stompor

Lab. Astroparticule et Cosmologie, CNRS, Univ. Paris Diderot (France)

Matthieu Tristram

Lab. de l'Accélérateur Linéaire, CNRS, Univ. Paris Sud (France)

Amit Yadav, Matias Zaldarriaga

Institute for Advanced Study (USA)

Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411C (July 15, 2010); doi:10.1117/12.857138
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From Conference Volume 7741

  • Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
  • Wayne S. Holland; Jonas Zmuidzinas
  • San Diego, California, USA | June 27, 2010

abstract

EBEX is a NASA-funded balloon-borne experiment designed to measure the polarization of the cosmic microwave background (CMB). Observations will be made using 1432 transition edge sensor (TES) bolometric detectors read out with frequency multiplexed SQuIDs. EBEX will observe in three frequency bands centered at 150, 250, and 410 GHz, with 768, 384, and 280 detectors in each band, respectively. This broad frequency coverage is designed to provide valuable information about polarized foreground signals from dust. The polarized sky signals will be modulated with an achromatic half wave plate (AHWP) rotating on a superconducting magnetic bearing (SMB) and analyzed with a fixed wire grid polarizer. EBEX will observe a patch covering ~1% of the sky with 8' resolution, allowing for observation of the angular power spectrum from l = 20 to 1000. This will allow EBEX to search for both the primordial B-mode signal predicted by inflation and the anticipated lensing B-mode signal. Calculations to predict EBEX constraints on r using expected noise levels show that, for a likelihood centered around zero and with negligible foregrounds, 99% of the area falls below r = 0.035. This value increases by a factor of 1.6 after a process of foreground subtraction. This estimate does not include systematic uncertainties. An engineering flight was launched in June, 2009, from Ft. Sumner, NM, and the long duration science flight in Antarctica is planned for 2011. These proceedings describe the EBEX instrument and the North American engineering flight.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Britt Reichborn-Kjennerud ; Asad M. Aboobaker ; Peter Ade ; François Aubin ; Carlo Baccigalupi, et al.
"EBEX: a balloon-borne CMB polarization experiment", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411C (July 15, 2010); doi:10.1117/12.857138; http://dx.doi.org/10.1117/12.857138


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