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. 2012 Feb 2;117:61–79. doi: 10.6028/jres.117.002

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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. 4 — Photograph of the thermal triple axis instrument at BT-7 in operation. The electronics for the front portion of the instrument (through the sample position) resides on top of the (green) monochromator drum, while the sample environment system is the top-loading He³ system with a base temperature of 300 mK. The sample is surrounded by the sample enclosure to adsorb scattered neutrons and reduce ambient instrumental background. The analyzer system is below 17° so that the beam stop is in the up position. Two PG filters and an x-y slit system are on the x-rail in front of the analyzer system. The electronics for the analyzer system resides on top of the analyzer.