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Shadow monochromatic backlighting: Large-field high resolution X-ray shadowgraphy with improved spectral tunability

  • T.A. PIKUZ (a1), A. YA. FAENOV (a1), M. FRAENKEL (a2) (a3), A. ZIGLER (a2), F. FLORA (a4), S. BOLLANTI (a4), P. DI LAZZARO (a4), T. LETARDI (a4), A. GRILLI (a5), L. PALLADINO (a6), G. TOMASSETTI (a6), A. REALE (a6), L. REALE (a6), A. SCAFATI (a6), T. LIMONGI (a6), F. BONFIGLI (a7), L. ALAINELLI (a8) and M. SANCHEZ DEL RIO (a8)...

Abstract

The shadow monochromatic backlighting (SMB) scheme, a modification of the well-known soft X-ray monochromatic backlighting scheme, is proposed. It is based on a spherical crystal as the dispersive element and extends the traditional scheme by allowing one to work with a wide range of Bragg angles and thus in a wide spectral range. The advantages of the new scheme are demonstrated experimentally and supported numerically by ray-tracing simulations. In the experiments, the X-ray backlighter source is a laser-produced plasma, created by the interaction of an ultrashort pulse, Ti:Sapphire laser (120 fs, 3–5 mJ, 1016 W/cm2 on target) or a short wavelength XeCl laser (10 ns, 1–2 J, 1013 W/cm2 on target) with various solid targets (Dy, Ni + Cr, BaF2). In both experiments, the X-ray sources are well localized spatially (∼20 μm) and are spectrally tunable in a relatively wide wavelength range (λ = 8–15 Å). High quality monochromatic (δλ/λ ∼ 10−5–10−3) images with high spatial resolution (up to ∼4 μm) over a large field of view (a few square millimeters) were obtained. Utilization of spherically bent crystals to obtain high-resolution, large field, monochromatic images in a wide range of Bragg angles (35° < Θ < 90°) is demonstrated for the first time.

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Corresponding author

Address correspondence and reprint requests to: F. Flora, ENEA, Dipartimento Innovazione, Settore Fisica Applicata, 00044 Frascati, Italy. E-mail: flor@frascati.enea.it.

Keywords

Shadow monochromatic backlighting: Large-field high resolution X-ray shadowgraphy with improved spectral tunability

  • T.A. PIKUZ (a1), A. YA. FAENOV (a1), M. FRAENKEL (a2) (a3), A. ZIGLER (a2), F. FLORA (a4), S. BOLLANTI (a4), P. DI LAZZARO (a4), T. LETARDI (a4), A. GRILLI (a5), L. PALLADINO (a6), G. TOMASSETTI (a6), A. REALE (a6), L. REALE (a6), A. SCAFATI (a6), T. LIMONGI (a6), F. BONFIGLI (a7), L. ALAINELLI (a8) and M. SANCHEZ DEL RIO (a8)...

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