Lawrence, C. R. and Eisenhardt, P. and Emming, J. and Finley, P. T. and Gautier, T. N. and Helou, G. and Hopkins, R. A. and Johnson, G. B. and Keene, J. and Kwok, J. H. and Lee, J. H. and Nieczkoski, S. J. and Roellig, T. L. and Schweickart, R. (2003) Operating SIRTF for maximum lifetime. In: IR Space Telescopes and Instruments. Proceedings of SPIE. No.4850. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 153-161. ISBN 9780819446299. https://resolver.caltech.edu/CaltechAUTHORS:20190115-084104903
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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%.
| Item Type: | Book Section | ||||||
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| Additional Information: | © 2003 Society of Photo-optical Instrumentation Engineers (SPIE). | ||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | ||||||
| Subject Keywords: | Cryogenics, infrared telescopes | ||||||
| Series Name: | Proceedings of SPIE | ||||||
| Issue or Number: | 4850 | ||||||
| DOI: | 10.1117/12.461953 | ||||||
| Record Number: | CaltechAUTHORS:20190115-084104903 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190115-084104903 | ||||||
| Official Citation: | Charles R. Lawrence, Peter Eisenhardt, Jan G. Emming, Paul T. Finley, Thomas Nicholas Gautier, 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, "Operating SIRTF for maximum lifetime," Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461953 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 92273 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Tony Diaz | ||||||
| Deposited On: | 15 Jan 2019 22:31 | ||||||
| Last Modified: | 16 Nov 2021 03:48 |
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