A Cryogenic Half-Wave Plate Polarimeter Using a Superconducting Magnetic Bearing

被引：16

作者：

Klein, Jeff ^{[1
]}

Aboobaker, Asad ^{[1
]}

Ade, Peter ^{[2
]}

Aubin, Francois ^{[3
]}

Baccigalupi, Carlo ^{[4
]}

Bao, Chaoyun ^{[1
]}

Borrill, Julian ^{[5
]}

Chapman, Daniel ^{[6
]}

Didier, Joy ^{[6
]}

Dobbs, Matt ^{[3
]}

Gold, Benjamin ^{[1
]}

Grainger, Will ^{[2
]}

Hanany, Shaul ^{[1
]}

Hubmayr, Johannes ^{[7
]}

Hillbrand, Seth ^{[6
]}

Grain, Julien ^{[8
]}

Jaffe, Andrew ^{[9
]}

Johnson, Bardley ^{[6
]}

Jones, Terry ^{[1
]}

Kisner, Theodore ^{[5
]}

Korotkov, Andrei ^{[9
]}

Leach, Sam ^{[4
]}

Lee, Adrian ^{[5
]}

Levinson, Lorne ^{[11
]}

Limon, Michele ^{[6
]}

MacDermid, Kevin ^{[3
]}

Matsumura, Tomotake ^{[12
]}

Miller, Amber ^{[6
]}

Milligan, Michael ^{[1
]}

Pascale, Enzo ^{[2
]}

Polsgrove, Daniel ^{[1
]}

Ponthieu, Nicolas ^{[8
]}

Raach, Kate ^{[1
]}

Reichborn-kjennerud, Britt ^{[6
]}

Sagiv, Ilan ^{[1
]}

Stompor, Radek ^{[13
]}

Huan Tran ^{[14
]}

Tristram, Matthieu ^{[15
]}

Tucker, Gregory S. ^{[10
]}

Yadav, Amit ^{[16
]}

Zaldarriaga, Matias ^{[16
]}

Zilic, Kyle ^{[1
]}

机构：

[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[2] Cardiff Univ, Cardiff CF24 3AA, S Glam, Wales

[3] McGill Univ, Montreal, PQ H3A 2T8, Canada

[4] Scuola Intl Superiore Studi Avanzati, Trieste 34136, Italy

[5] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[6] Columbia Univ, New York, NY 11027 USA

[7] Natl Inst Standards & Technol, Boulder, CO 80305 USA

[8] Univ Paris 11, Inst Astrophys Spatiale, Orsay, France

[9] Imperial Coll, London SW7 2AZ, England

[10] Brown Univ, Providence, RI 02912 USA

[11] Weizmann Inst Sci, Rehovot 76100, Israel

[12] High Energy Accelerator Org, Inst Particle & Nucl Studies, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[13] Univ Paris Diderot, Lab Astroparticule Cosmologie, CNRS, Paris, France

[14] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[15] Univ Paris 11, Lab Accelerateur Linearie, CNRS, Orsay, France

[16] Inst Adv Study, Princeton, NJ 08540 USA

来源：

CRYOGENIC OPTICAL SYSTEMS AND INSTRUMENTS XIII | 2011年 / 8150卷

关键词：

D O I：

10.1117/12.893669

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We present the design and measured performance of the superconducting magnetic bearing (SMB) that was used successfully as the rotation mechanism in the half-wave plate polarimeter of the E and B Experiment (EBEX) during its North American test flight. EBEX is a NASA-supported balloon-borne experiment that is designed to measure the polarization of the cosmic microwave background. In this implementation the half-wave plate is mounted to the rotor of an SMB that is operating at a sink temperature of 4 K. We demonstrate robust, remote operation on a balloon-borne payload, with angular encoding accuracy of 0.01 degrees. We find rotational speed variations to be 0.2% RMS. We measure vibrational modes and find them to be consistent with a simple SMB model. We search for but do not find magnetic field interference in the detectors and readout. We set an upper limit of 3% of the receiver noise level after 5 minutes of integration on such interference. At 2 Hz rotation we measure a power dissipation of 56 mW. If this power dissipation is reduced, such an SMB implementation is a candidate for low-noise space applications because of the absence of stick-slip friction and low wear.

引用

页数：10