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Proceedings Paper

Operating SIRTF for maximum lifetime
Author(s): Charles R. Lawrence; Peter Eisenhardt; Jan G. Emming; Paul T. Finley; Thomas Nicholas Gautier III; George Helou; Richard A. Hopkins; Gregory B. Johnson; Jocelyn Keene; Johnny H. Kwok; Jeff H. Lee; Stephen J. Nieczkoski; Thomas L. Roellig; Russell B. Schweickart
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Paper Abstract

The instruments of the Space Infrared Telescope Facility (SIRTF) are cooled directly by liquid helium, while the optical system is cooled by helium vapor. The greater the power dissipation into the liquid helium, the more vapor is produced, and the colder the telescope. Observations at shorter wavelengths do not require telescope temperatures as low as those required at shorter wavelengths. By taking advantage of this, it may be possible to extend the helium and mission lifetime by 10% or even 20%

Paper Details

Date Published: 5 March 2003
PDF: 9 pages
Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461953
Show Author Affiliations
Charles R. Lawrence, Jet Propulsion Lab. (United States)
Peter Eisenhardt, Jet Propulsion Lab. (United States)
Jan G. Emming, Ball Aerospace & Technologies Corp. (United States)
Paul T. Finley, Ball Aerospace & Technologies Corp. (United States)
Thomas Nicholas Gautier III, Jet Propulsion Lab. (United States)
George Helou, California Institute of Technology (United States)
Richard A. Hopkins, Ball Aerospace & Technologies Corp. (United States)
Gregory B. Johnson, Ball Aerospace & Technologies Corp. (United States)
Jocelyn Keene, Jet Propulsion Lab. (United States)
Johnny H. Kwok, Jet Propulsion Lab. (United States)
Jeff H. Lee, Ball Aerospace & Technologies Corp. (United States)
Stephen J. Nieczkoski, Ball Aerospace & Technologies Corp. (United States)
Thomas L. Roellig, NASA Ames Research Ctr. (United States)
Russell B. Schweickart, Ball Aerospace & Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 4850:
IR Space Telescopes and Instruments
John C. Mather, Editor(s)

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