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Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI

DOI: 10.1117/12.927057

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The bolometric focal plane array of the POLARBEAR CMB experiment

Journal article published in 2012 by K. Arnold, P. A. R. Ade, A. E. Anthony, D. Barron, D. Boettger, J. Borrill, S. Chapman, Y. Chinone ORCID, M. A. Dobbs ORCID, J. Errard, G. Fabbian, D. Flanigan, G. Fuller, A. Ghribi, W. Grainger and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The Polarbear Cosmic Microwave Background (CMB) polarization experiment is currently observing from the Atacama Desert in Northern Chile. It will characterize the expected B-mode polarization due to gravitational lensing of the CMB, and search for the possible B-mode signature of inflationary gravitational waves. Its 250 mK focal plane detector array consists of 1,274 polarization-sensitive antenna-coupled bolometers, each with an associated lithographed band-defining filter. Each detector's planar antenna structure is coupled to the telescope's optical system through a contacting dielectric lenslet, an architecture unique in current CMB experiments. We present the initial characterization of this focal plane.