title: On-blaze operation of a Mo/Si multilayer-coated, concave diffraction grating in the 136-142-A wavelength region and near normal incidence.
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-A near normal incidence. The efficiency of the multilayer grating for wavelengths in the 136-139-A 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 multilayercoated grating in the third order of a V viii transition with a first-order wavelength of 140.451 A 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.
authors.forename: J F
authors.initials: JF
authors.lastname: Seely
authors.forename: M P
authors.initials: MP
authors.lastname: Kowalski
authors.forename: W R
authors.initials: WR
authors.lastname: Hunter
authors.forename: J C
authors.initials: JC
authors.lastname: Rife
authors.forename: T W
authors.initials: TW
authors.lastname: Barbee
authors.forename: G E
authors.initials: GE
authors.lastname: Holland
authors.forename: C N
authors.initials: CN
authors.lastname: Boyer
authors.forename: C M
authors.initials: CM
authors.lastname: Brown