A Caltech Library Service

SPIDER: a new balloon-borne experiment to measure CMB polarization on large angular scales

Montroy, T. E. and Brevik, J. and Crill, B. P. and Crites, A. and Golwala, S. R. and Hristov, V. V. and Jones, W. C. and Kuo, C. L. and Lange, A. E. and Mason, P. and Trangsrud, A. (2006) SPIDER: a new balloon-borne experiment to measure CMB polarization on large angular scales. In: Ground-based and Airborne Telescopes. Proceedings of SPIE. No.6267. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 62670R. ISBN 0819463329.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We describe SPIDER, a novel balloon-borne experiment designed to measure the polarization of the Cosmic Microwave Background (CMB) on large angular scales. The primary goal of SPIDER is to detect the faint signature of inflationary gravitational waves in the CMB polarization. The payload consists of six telescopes, each operating in a single frequency band and cooled to 4 K by a common LN/LHe cryostat. The primary optic for each telescope is a 25 cm diameter lens cooled to 4 K. Each telescope feeds an array of antenna coupled, polarization sensitive sub-Kelvin bolometers that covers a 20 degree diameter FOV with diffraction limited resolution. The six focal planes span 70 to 300 GHz in a manner optimized to separate polarized galactic emission from CMB polarization, and together contain over 2300 detectors. Polarization modulation is achieved by rotating a cryogenic half-wave plate in front of the primary optic of each telescope. The cryogenic system is designed for 30 days of operation. Observations will be conducted during the night portions of a mid-latitude, long duration balloon flight which will circumnavigate the globe from Australia. By spinning the payload at 1 rpm with the six telescopes fixed in elevation, SPIDER will map approximately half of the sky at each frequency on each night of the flight.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Crill, B. P.0000-0002-4650-8518
Golwala, S. R.0000-0002-1098-7174
Additional Information:© 2006 Society of Photo-optical Instrumentation Engineers (SPIE). We gratefully acknowledge Danny Ball and the staff at the Columbia Scientific Ballooning Facility for help in planning the flight strategy and performing payload flight simulations. Simulations of CMB observations were performed on the McKenzie cluster64 at the Canadian Institute for Theoretical Astrophysics which was funded by the Canada Foundation for Innovation and the Ontario Innovation Trust. CBN acknowledges sabbatical support from NASA JPL. Work on SPIDER at Caltech is currently funded by a generous gift from John Robinson.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Canada Foundation for InnovationUNSPECIFIED
Ontario Innovation TrustUNSPECIFIED
Subject Keywords:Radio telescopes, Scientific ballooning, Cosmic Microwave Background Radiation, Bolometer, Polarimetry, Focal plane arrays, SQUID, Half-wave plate
Series Name:Proceedings of SPIE
Issue or Number:6267
Record Number:CaltechAUTHORS:20180724-085603767
Persistent URL:
Official Citation:T. E. Montroy, P. A. R. Ade, R. Bihary, J. J. Bock, J. R. Bond, J. Brevick, C. R. Contaldi, B. P. Crill, A. Crites, O. Doré, L. Duband, S. R. Golwala, M. Halpern, G. Hilton, W. Holmes, V. V. Hristov, K. Irwin, W. C. Jones, C. L. Kuo, A. E. Lange, C. J. MacTavish, P. Mason, J. Mulder, C. B. Netterfield, E. Pascale, J. E. Ruhl, A. Trangsrud, C. Tucker, A. Turner, M. Viero, "SPIDER: a new balloon-borne experiment to measure CMB polarization on large angular scales", Proc. SPIE 6267, Ground-based and Airborne Telescopes, 62670R (12 July 2006); doi: 10.1117/12.670339;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88156
Deposited By: Tony Diaz
Deposited On:24 Jul 2018 16:19
Last Modified:03 Oct 2019 20:03

Repository Staff Only: item control page