High-resolution EUV spectroscopy: performance of spherical multilayer-coated gratings operated at near normal incidence

Michael P. Kowalski; John F. Seely; Raymond G. Cruddace; Jack C. Rife; Charles M. Brown; George A. Doschek; Uri Feldman; Troy W. Barbee Jr.; William R. Hunter; Glenn E. Holland; Craig Nelson Boyer

doi:10.1117/12.158759

1 November 1993 High-resolution EUV spectroscopy: performance of spherical multilayer-coated gratings operated at near normal incidence

Michael P. Kowalski, John F. Seely, Raymond G. Cruddace, Jack C. Rife, Charles M. Brown, George A. Doschek, Uri Feldman, Troy W. Barbee Jr., William R. Hunter, Glenn E. Holland, Craig Nelson Boyer

Author Affiliations +

Proceedings Volume 1945, Space Astronomical Telescopes and Instruments II; (1993) https://doi.org/10.1117/12.158759
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

A program is underway at the Naval Research Laboratory (NRL) to develop a high-resolution spectrometer for the study of astrophysical sources at EUV/soft X-ray wavelengths. The spectrometer design is simple in that the sole optic is a multilayer-coated spherical grating or mosaic of co-aligned gratings used at near-normal incidence, allowing large effective collecting area without the strict tolerance requirements of grazing incidence optics. Therefore, both high resolution and high throughput can be obtained over several selected narrow bandpasses. We present efficiency and resolving power measurements of spherical gratings which have parameters similar to that intended for our flight instrument. Two gratings were replicated from the same ruled master and then coated with a multilayer of molybdenum and silicon. A third sister grating was used as a control and overcoated with gold.

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Michael P. Kowalski, John F. Seely, Raymond G. Cruddace, Jack C. Rife, Charles M. Brown, George A. Doschek, Uri Feldman, Troy W. Barbee Jr., William R. Hunter, Glenn E. Holland, and Craig Nelson Boyer "High-resolution EUV spectroscopy: performance of spherical multilayer-coated gratings operated at near normal incidence", Proc. SPIE 1945, Space Astronomical Telescopes and Instruments II, (1 November 1993); https://doi.org/10.1117/12.158759

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