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. 2004 Feb 1;109(1):75–98. doi: 10.6028/jres.109.006

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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. 11 — The monolithic double crystal spectrometer (MDCS). α is the angle of rotation and (h₁ k₁ l₁) and (h₂ k₂ l₂) are the two participating Bragg planes. The beam trajectory used for aligning the rotation axis normal to the (h₁ k₁ l₁) plane, and the trajectory of the measured beam are also shown.