Study of diffraction efficiency of a free-standing transmission grating in keV spectral region using laser produced plasmas

• Published in: Optics and laser technology 1998-09, Vol.30 (6), p.407-410
• Main Authors: Sailaja, S, Arora, V, Kumbhare, S.R, Naik, P.A, Gupta, P.D
• Format: Article
• Language: English
• Subjects: Diffraction efficiency; Electromagnetism; electron and ion optics; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Laser produced plasma; Physics; X- and γ-ray instruments and techniques; X- and γ-ray sources, mirrors, gratings and detectors; X-ray beams and x-ray optics; X-ray transmission grating
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/S0030-3992(98)00072-3

X-ray line emission from a laser produced plasma has been used to study relative diffraction efficiency of a gold microstructure transmission grating in the keV spectral region. Measurements of X-ray intensity of the Mg XI 1s 2–1s2p line emission at λ=9.2 Å obtained from a laser produced magnesium plasma were made from the zeroth to fourth diffraction order. The contribution of continuum and line radiation at other wavelengths to the zeroth order was suppressed by using appropriate X-ray filter. Enhanced diffraction efficiencies observed for the first to fourth orders relative to the zeroth order are found to be in agreement with theoretical calculations considering the effect of partial X-ray transmission through the gold bars.