TY - JOUR
T1 - Shadow monochromatic backlighting
T2 - Large-field high resolution X-ray shadowgraphy with improved spectral tunability
AU - Pikuz, T. A.
AU - Faenov, A. Ya
AU - Fraenkel, M.
AU - Zigler, A.
AU - Flora, F.
AU - Bollanti, S.
AU - Di Lazzaro, P.
AU - Letardi, T.
AU - Grilli, A.
AU - Palladino, L.
AU - Tomassetti, G.
AU - Reale, A.
AU - Reale, L.
AU - Scafati, A.
AU - Limongi, T.
AU - Bonfigli, F.
AU - Alainelli, L.
AU - Sanchez Del Rio, M.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
KW - Laser plasma diagnostics
KW - X-ray backlighting
KW - X-ray optics
UR - http://www.scopus.com/inward/record.url?scp=15744366239&partnerID=8YFLogxK
U2 - 10.1017/S0263034601192189
DO - 10.1017/S0263034601192189
M3 - Article
AN - SCOPUS:15744366239
SN - 0263-0346
VL - 19
SP - 285
EP - 293
JO - Laser and Particle Beams
JF - Laser and Particle Beams
IS - 2
ER -