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

T. A. Pikuz, A. Ya Faenov, M. Fraenkel, A. Zigler, F. Flora*, S. Bollanti, P. Di Lazzaro, T. Letardi, A. Grilli, L. Palladino, G. Tomassetti, A. Reale, L. Reale, A. Scafati, T. Limongi, F. Bonfigli, L. Alainelli, M. Sanchez Del Rio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

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, 1013W/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.

Original languageEnglish (US)
Pages (from-to)285-293
Number of pages9
JournalLaser and Particle Beams
Volume19
Issue number2
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • Laser plasma diagnostics
  • X-ray backlighting
  • X-ray optics

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

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