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Applied Optics

Applied Optics


  • Vol. 31, Iss. 1 — Jan. 1, 1992
  • pp: 95–100

Resonant cryogenic chopper

Lyman A. Page, Edward S. Cheng, and Stephan S. Meyer  »View Author Affiliations

Applied Optics, Vol. 31, Issue 1, pp. 95-100 (1992)

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We describe the design, construction, and performance of a resonant cryogenic chopper that operates at 4.2 K. The chopper is mechanically and thermally robust; it can occult a 2.54-cm aperture at 4.5 Hz while dissipating ~1 mW. Both the stator and rotor magnetic fields are controllable to allow for performance optimization and to help in measuring any possible interference effects. Data on long-term amplitude stability are presented.

© 1992 Optical Society of America

Original Manuscript: July 31, 1990
Published: January 1, 1992

Lyman A. Page, Edward S. Cheng, and Stephan S. Meyer, "Resonant cryogenic chopper," Appl. Opt. 31, 95-100 (1992)

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  1. L. A. Page, E. S. Cheng, S. S. Meyer, “A large-scale cosmic microwave background anisotropy measurement at millimeter and submillimeter wavelengths,” Astrophys. Lett. 355, L1–L4 (1990). [CrossRef]
  2. P. M. Downey, A. D. Jeffries, S. S. Meyer, R. Weiss, “Monolithic silicone bolometers,” Appl. Opt. 23, 910–000 (1984). [CrossRef] [PubMed]
  3. J. B. Peterson, “The spectrum of the cosmic background radiation from 2.3 cm−1 to 11 cm−1,” Ph.D. Thesis, Department of Physics, University of California at Berkeley (Apr.1985).
  4. H. Murakami, A. E. Lange, “A low frequency beam switch,” in A. E. Lange,” An Attempt to Measure the Diffuse Brightness of the Sky at Submillimeter Wavelengths,” Ph.D. dissertation Department of Physics, University of California, Berkeley, Berkeley (January1987).
  5. Frequency Control Products, Inc., Calif., 61-20 Woodside Ave., Woodside, N.Y. 11377; (212) 458-5811. This company also makes a taut band chopper for large apertures.
  6. Supercon, Inc., 830 Boston Turnpike, Shrewsbury, Mass. 01545; (617) 842-0174.
  7. Emerson & Cuming, Inc., Canton, Mass. 02021.
  8. Vacuumschmelze, 186 Wood Ave. South, Iselin, N.J. 08830; (201) 321-4791.
  9. M. N. Wilson, Superconducting Magnets (Clarendon, Oxford, 1983).

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