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A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument
File | Description | Size | Format | |
---|---|---|---|---|
1510.01771v1.pdf | Accepted version | 12.42 MB | Adobe PDF | View/Open |
1%2E4939435.pdf | Published version | 8.11 MB | Adobe PDF | View/Open |
Title: | A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument |
Authors: | Bryan, S Ade, P Amiri, M Benton, S Bihary, R Bock, J Bond, JR Chiang, HC Contaldi, C Crill, B Dore, O Elder, B Filippini, J Fraisse, A Gambrel, A Gandilo, N Gudmundsson, J Hasselfield, M Halpern, M Hilton, G Holmes, W Hristov, V Irwin, K Jones, W Kermish, Z Lawrie, C MacTavish, C Mason, P Megerian, K Moncelsi, L Montroy, T Morford, T Nagy, J Netterfield, CB Padilla, I Rahlin, AS Reintsema, C Riley, DC Ruhl, J Runyan, M Saliwanchik, B Shariff, J Soler, J Trangsrud, A Tucker, C Tucker, R Turner, A Wen, S Wiebe, D Young, E |
Item Type: | Journal Article |
Abstract: | We describe the cryogenic half-wave plate rotation mechanisms built for and used in Spider, a polarization-sensitive balloon-borne telescope array that observed the Cosmic Microwave Background at 95 GHz and 150 GHz during a stratospheric balloon flight from Antarctica in January 2015. The mechanisms operate at liquid helium temperature in flight. A three-point contact design keeps the mechanical bearings relatively small but allows for a large (305 mm) diameter clear aperture. A worm gear driven by a cryogenic stepper motor allows for precise positioning and prevents undesired rotation when the motors are depowered. A custom-built optical encoder system monitors the bearing angle to an absolute accuracy of +/- 0.1 degrees. The system performed well in Spider during its successful 16 day flight. |
Issue Date: | 8-Jan-2016 |
Date of Acceptance: | 18-Dec-2015 |
URI: | http://hdl.handle.net/10044/1/51616 |
DOI: | https://dx.doi.org/10.1063/1.4939435 |
ISSN: | 1089-7623 |
Publisher: | American Institute of Physics (AIP) |
Start Page: | 014501 |
End Page: | 014501 |
Journal / Book Title: | Review of Scientific Instruments |
Volume: | 87 |
Copyright Statement: | © 2016 AIP Publishing LLC |
Sponsor/Funder: | Science and Technology Facilities Council (STFC) |
Funder's Grant Number: | ST/L00044X/1 |
Keywords: | Science & Technology Technology Physical Sciences Instruments & Instrumentation Physics, Applied Physics POLARIMETRY POLARIZATION SYSTEMATICS astro-ph.IM astro-ph.CO 09 Engineering 02 Physical Sciences 03 Chemical Sciences Applied Physics |
Notes: | 11 pages, 7 figures, Published in Review of Scientific Instruments. v2 includes reviewer changes and longer literature review |
Publication Status: | Published |
Open Access location: | http://arxiv.org/pdf/1510.01771.pdf |
Article Number: | 014501 |
Appears in Collections: | Theoretical Physics Faculty of Natural Sciences |