Comparison of blazed and laminar profile varied-line-spacing gratings

Mark Bissen; Mike V. Fisher; Greg Rogers

doi:10.1117/12.283975

3 November 1997 Comparison of blazed and laminar profile varied-line-spacing gratings

Mark Bissen, Mike V. Fisher, Greg Rogers

Proceedings Volume 3150, Gratings and Grating Monochromators for Synchrotron Radiation; (1997) https://doi.org/10.1117/12.283975
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

The performance of a beamline containing a blazed and a laminar grating is reported in this paper. Two varied line spacing (VLS) gratings are currently installed in the SRC High Energy Resolution Monochromator (HERMON). The blazed grating was ruled on a conventional ruling engine. The laminar profile grating was created holographically. The grating blanks were cut from a single spherical substrate having a figure error of less than 0.2 arcseconds RMS. The theoretical resolving power of 5000 to 10000 has been achieved in the energy range of 245 to 550 eV for the medium energy grating and 500 tol 150 eVfor the high energy grating indicating correct application of the polynomial groove density to the gratings. The groove profile for the laminar grating has been measured using atomic force microscopy and is in agreement with specifications. The beamline achieves near theoretical throughput throughout its scan range. A third grating which was designed to be blazed and ion etched is currently being evaluated.

Citation Download Citation

Mark Bissen, Mike V. Fisher, and Greg Rogers "Comparison of blazed and laminar profile varied-line-spacing gratings", Proc. SPIE 3150, Gratings and Grating Monochromators for Synchrotron Radiation, (3 November 1997); https://doi.org/10.1117/12.283975

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