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. 2011 Apr 1;116(2):621–646. doi: 10.6028/jres.116.009

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 6a — Variable temperature heat pipe Blackbodies (BB) at the AIRI Facility: 1. Controlled Background Plate for Unit Under Test; 2. Ammonia BB (−50 °C to 50 °C), 3. Water Bath BB (15 °C to 75 °C), 4. Water heat pipe BB (60 °C to 250 °C), 5. Cs heat pipe BB (300 °C to 650 °C) and 6. Na heat pipe BB (500 °C to 1100 °C), 7. Spectral comparator (3 μm to 14.8 μm).