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13 results on '"Boyer, C.N."'

4. On-blaze operation of a Mo/Si multilayer-coated, concave diffraction grating in the 136-142-Angstroms wavelength region and near normal incidence

Author

Seely, J.F., Kowalski, M.P., Hunter, W.R., Rife, J.C., Barbee, T.W., Jr., Holland, G.E., Boyer, C.N., and Brown, C.M.

Subjects
Diffraction gratings -- Analysis, Optical coatings -- Analysis, Astronomy, Physics
Abstract

The efficiency and resolving power of a concave, 2400-groove/mm, blazed diffraction grating that had a Mo/Si multilayer coating were determined. The multilayer coating had a peak reflectance of 55% at 140-Angstroms near normal incidence. The efficiency of the multilayer grating for wavelengths in the 136-139-Angstroms range was 2% near normal incidence. This efficiency was a factor of 150 greater than the efficiency of a sister replica Au-coated grating in the same wavelength region. The resolving power of the multilayer-coated grating in the third order of a V VIII transition with a first-order wavelength of 140.451 Angstroms was 9100. Comparisons with the Au-coated grating indicated that the application of the multilayer coating did not affect the resolving power or the blaze angle.

Published
1993

5. Dual-waveband operation of a multilayer-coated diffraction grating in the soft x-ray range at near-normal incidence

Author

Kowalski, M.P., Seely, J.F., Hunter, W.R., Rife, J.C., Barbee, T.W., Jr., Holland, G.E., Boyer, C.N., Brown, C.M., and Cruddace, R.G.

Subjects
Diffraction gratings -- Research, Optical coatings -- Research, Ultraviolet radiation -- Research, Astronomy, Physics
Abstract

A concave diffraction grating (2400 grooves/mm) coated with a Si/Mo multilayer has an efficiency of 2.5% at 290 angstrom and a resolving power of 14,000 in third order of 156 angstrom.

Published
1993

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