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. 1993 Jan-Feb;98(1):71–87. doi: 10.6028/jres.098.006

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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. 16 — Simplified view of the choppers and guide for the disk chopper spectrometer. Note that the pulsing and monochromating chopper disks each have three slots (of different sizes for different resolution modes of the instrument) and that the guide is divided into five channels.