Comparison of mechanically ruled versus holographically varied line-spacing gratings for a soft-x-ray flat-field spectrograph

Takashi Yamazaki, Eric Gullikson, Noboru Miyata, Masato Koike, Stanley Mrowka, Ulf Kleineberg, James H. Underwood, Mihiro M. Yanagihara, Kazuo Sano

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Recent progress in the design of aspheric wave-front recording systems has permitted the manufacture of holographic gratings with highly variable groove densities that are suitable for flat-field spectrographs. A holographic grating thus recorded was processed to produce a laminar profile by use of reactive-ion etching. Measurements are reported of the absolute diffraction efficiency of this grating and of a comparable mechanically ruled grating. It is found that the holographic grating is much more effective in suppressing the higher orders. The spectral resolution was determined by use of a carbon Ka x-ray generator and a spectrograph with an imaging detector. The spectral resolution of the holographic grating was approximately 3 times worse than that of the ruled grating.

Original languageEnglish
Pages (from-to)4001-4003
Number of pages3
JournalApplied optics
Volume38
Issue number19
DOIs
Publication statusPublished - 1999 Jul 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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