12 October 2004 Thermal design trades for SAFIR architecture concepts
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Abstract
SAFIR is a 10-meter, 4 K space telescope optimized for wavelengths between 20 microns and 1 mm. The combination of aperture diameter and telescope temperature will provide a raw sensitivity improvement of more than a factor of 1000 over presently-planned missions. The sensitivity will be comparable to that of the JWST and ALMA, but at the critical far infrared wavelengths, where much of the universe's radiative energy has emerged since the origin of stars and galaxies. We examine several of the critical technologies for SAFIR which enable the large cold aperture, and present results of studies examining the spacecraft thermal architecture. Both the method by which the aperture is filled, and the overall optical design for the telescope can impact the potential scientific return of SAFIR. Thermal architecture that goes far beyond the sunshades developed for the James Webb Space Telescope will be necessary to achieve the desired sensitivity of SAFIR. By optimizing a combination of active and passive cooling at critical points within the observatory, a significant reduction of the required level of active cooling can be obtained.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Harold W. Yorke, Christopher G. Paine, Charles M. Bradford, Mark Dragovan, Al E. Nash, Jennifer A. Dooley, Charles R. Lawrence, "Thermal design trades for SAFIR architecture concepts", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551995; https://doi.org/10.1117/12.551995
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