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  • Since our report in the spring Aladdin, the first completely ruled grating has been installed in the HERMON beamline. Although near- theoretical resolving powers are achieved with this grating, the efficiency declines above 600 eV, apparently due to a shallow ruling depth. A replacement grating is expected in time for experiments on the line, which are scheduled to begin in August.

    An important contribution to HERMON's high resolution is made by the In-Focus Monochromator (IFM)[1] invented by Michael C. Hettrick of Hettrick Scientific, Inc. and licensed by the SRC and the UW Physical Sciences Laboratory in constructing the monochromator for HERMON. U.S. Patent 4,991,934, which covers the IFM principle, has been granted to Hettrick Scientific, Inc.

    [1] In-Focus Monochromator and IFM are trademarks of Hettrick Scientific, Inc.