The Keck Array: a pulse tube cooled CMB polarimeter

Author(s): C. D. Sheehy; P. A. R. Ade; R. W. Aikin; M. Amiri; S. Benton; C. Bischoff; J. J. Bock; J. A. Bonetti; J. A. Brevik; B. Burger; C. D. Dowell; L. Duband; J. P. Filippini; S. R. Golwala; M. Halpern; M. Hasselfield; G. Hilton; V. V. Hristov; K. Irwin; J. P. Kaufman; B. G. Keating; J. M. Kovac; C. L. Kuo; A. E. Lange; E. M. Leitch; M. Lueker; C. B. Netterfield; H. T. Nguyen; R. W. Ogburn IV; A. Orlando; C. L. Pryke; C. Reintsema; S. Richter; J. E. Ruhl; M. C. Runyan; Z. Staniszewski; S. Stokes; R. Sudiwala; G. Teply; K. L. Thompson; J. E. Tolan; A. D. Turner; P. Wilson; C. L. Wong

Published: 19 July 2010; 8 pages; 81 papers;
DOI: 10.1117/12.857871

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Paper Abstract

The Keck Array is a cosmic microwave background (CMB) polarimeter that will begin observing from the South Pole in late 2010. The initial deployment will consist of three telescopes similar to BICEP2 housed in ultracompact, pulse tube cooled cryostats. Two more receivers will be added the following year. In these proceedings we report on the design and performance of the Keck cryostat. We also report some initial results on the performance of antenna-coupled TES detectors operating in the presence of a pulse tube. We find that the performance of the detectors is not seriously impacted by the replacement of BICEP2's liquid helium cryostat with a pulse tube cooled cryostat.

This paper was published in SPIE Proceedings Vol. 7741

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, Wayne S. Holland; Jonas Zmuidzinas, Editors, 77411R