Numerical investigation of laser radiation conversion to X rays in experiments with spherical boxes with interior coatings of different materials
- Russian Federal Nuclear Center - The All-Russian Research Institute of Experimental Physics, Sarov, Nizhnii Novgorod region (Russian Federation)
The dynamics of laser and X-ray radiation fields in experiments with spherical boxes was numerically investigated in a sector approximation using the SND-LIRA numerical code. The experiments were performed on the Iskra-5 laser facility at a wavelength {lambda}=0.657 {mu}m (the second harmonic of iodine laser radiation). The characteristics of X-ray generation were investigated with the inner surface of a converter box coated with different-Z materials (Au, Cu, Mg). With lowering Z, the laser energy absorption coefficient k{sub a} decreases and there occurs a lowering of the effective X-ray radiation temperature. Our calculations reveal a strong dependence of the results on the electron free-streaming flux limitation f. In particular, on lowering f from 0.1 to 0.03 for a conventional box with a gold coating, the coefficient k{sub a} decreases from 0.83 to 0.5 and the peak X-ray radiation temperature drops from 170 to 150eV. In these calculations, the rms nonuniformity of the X-ray irradiation of a capsule with thermonuclear fuel amounted to 1%-3%.
- OSTI ID:
- 21471354
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 40, Issue 5; Other Information: DOI: 10.1070/QE2010v040n05ABEH014297; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
APPROXIMATIONS
CAPSULES
COATINGS
COPPER
ELECTRONS
ENERGY ABSORPTION
GOLD
IODINE LASERS
IRRADIATION
LASER RADIATION
MAGNESIUM
SPHERICAL CONFIGURATION
SURFACES
THERMONUCLEAR FUELS
WAVELENGTHS
X RADIATION
ABSORPTION
ALKALINE EARTH METALS
CALCULATION METHODS
CONFIGURATION
CONTAINERS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FUELS
GAS LASERS
IONIZING RADIATIONS
LASERS
LEPTONS
METALS
RADIATIONS
SORPTION
TRANSITION ELEMENTS