Single-shot calibration of soft x-ray mirrors using a sinusoidal transmission gratinga

Calibration of soft x-ray diagnostics is a challenge due to the lack of laboratory-size calibrated sources. An in situ calibration method for newly developed x-ray mirrors, is presented. The x-ray source is produced by laser-matter interaction, and twin transmission gratings which create two identic...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11)
Main Authors: Shpilman, Z, Ehrlich, Y, Maman, S, Levy, I, Shussman, T, Oren, G, Zakosky, Nueberger I, Hurvitz, G
Format: Article
Language:English
Subjects:
Calibration
Gratings (spectra)
Scientific apparatus & instruments
Soft x rays
X ray mirrors
X ray sources
X ray spectra
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Summary:Calibration of soft x-ray diagnostics is a challenge due to the lack of laboratory-size calibrated sources. An in situ calibration method for newly developed x-ray mirrors, is presented. The x-ray source is produced by laser-matter interaction, and twin transmission gratings which create two identical dispersion lines. The gratings have a sinusoidal transmission function, which produces a highly precise high-orders free spectrum. An x-ray mirror interacts with one of the dispersion lines, and the mirror efficiency curve as a function of wavelength is extracted. Mirror efficiency shows good agreement with the literature, and evidence of water layer may justify the need of in situ calibration.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4890404