Simple model of the conversion of laser light into soft x-rays

1992 ◽  
Vol 13 (5) ◽  
pp. 390-395 ◽  
Author(s):  
S. Yu. Gus'kov ◽  
M. Kolanowski
Keyword(s):  
Simple Model ◽  
Laser Light ◽  
X Rays

scholarly journals A simple model for soft X-ray conversion efficiency from laser-irradiated gold disk targets

1984 ◽  
Vol 2 (3) ◽  
pp. 303-307 ◽  
Author(s):  
P. H. Y. Lee ◽  
H. G. Ahlstrom
Keyword(s):  
Heat Conduction ◽  
Simple Model ◽  
Conversion Efficiency ◽  
Laser Light ◽  
Laser Intensity ◽  
Laser Energy ◽  
High Irradiance ◽  
X Rays ◽  
X Ray ◽  
Laser Heated

Simple arguments are used to construct a model to explain the conversion efficiency of absorbed laser energy into soft X-rays from laser-irradiated targets. In this model, we postulate that the energy available for conversion is bounded at some low irradiance limit by heat conduction away from the laser heated spot, while at some high irradiance limit it is bounded by the energy lost in plasma blowoff. Consequently, at some appropriate laser intensity, where the sum energy of the conduction and blowoff losses is at a minimum, the X-ray conversion efficiency should reach a maximum. A specific example for gold disk targets irradiated by 0·53 μm laser light will be treated. Simple heuristic scalings of blowoff and conduction as functions of laser intensity are obtained.

scholarly journals Heterodyne Near Field Speckles: from laser light to X-rays

2021 ◽  
Vol 6 (1) ◽  
pp. 1891001
Author(s):  
M. Siano ◽  
B. Paroli ◽  
M. A. C. Potenza
Keyword(s):  
Laser Light ◽  
Near Field ◽  
X Rays

scholarly journals Investigation of light absorption, energy transfer, and plasma dynamic processes in laser-irradiated targets of low average density

1999 ◽  
Vol 17 (3) ◽  
pp. 415-426 ◽  
Author(s):  
A.E. BUGROV ◽  
I.N. BURDONSKII ◽  
V.V. GAVRILOV ◽  
A.Yu. GOL'TSOV ◽  
S.Yu. GUS'KOV ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Absorption ◽  
Laser Light ◽  
Plasma Layer ◽  
Average Density ◽  
Diagnostic Methods ◽  
Radiative Energy ◽  
X Rays ◽  
Plasma Dynamic ◽  
X Ray

The interaction of powerful laser and X-ray pulses with planar low average density (0.5–10 mg/cm3) porous agar-agar targets was experimentally studied. At a laser power density of ∼5 × 1013 W/cm2 (λ = 1.054 μm) the laser light absorption and following energy transfer processes, as well as dynamics of produced plasma were investigated in detail with a variety of optical and X-ray diagnostic methods. Volume absorption is shown to occur in experiments with laser-irradiated agar targets. An extended laser energy deposition region filled with hot (0.8–1 keV) plasma is formed inside a porous target. The laser light absorption efficiency is as high as ∼80%. The emission of 2ω0 and 3ω0/2 harmonics from laser-produced plasma is observed over the time of the laser pulse even with agar targets of 0.5 mg/cm3 average density. Characteristics of energy transfer in low-density porous media are measured in experiments on illumination of agar targets by laser pulses or X rays emitted by a thin Cu converter. The hydrodynamic mechanism is responsible for the energy transfer in laser-illuminated porous targets and the radiative energy transfer seems to be dominant in the case of X-ray irradiation. The experimental data are in reasonable agreement with predictions of a developed theoretical model describing the hot plasma layer formation and the two-stage homogenization process within the illuminated porous targets.

Conversion of laser light into soft x rays. Part I: Dimensional analysis

1990 ◽  
Vol 2 (1) ◽  
pp. 199-207 ◽  
Author(s):  
R. Sigel ◽  
K. Eidmann ◽  
F. Lavarenne ◽  
R. F. Schmalz
Keyword(s):  
Dimensional Analysis ◽  
Laser Light ◽  
X Rays

Control over high peak-power laser light and laser-driven X-rays

2018 ◽  
Vol 412 ◽  
pp. 141-145
Author(s):  
Baozhen Zhao ◽  
Sudeep Banerjee ◽  
Wenchao Yan ◽  
Ping Zhang ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Peak Power ◽  
Laser Light ◽  
High Peak ◽  
High Peak Power ◽  
X Rays ◽  
Power Laser

scholarly journals Simultaneous x-ray and optical shadowgraphy of cavities heated by λ = 0.44 μm laser light

1988 ◽  
Vol 6 (2) ◽  
pp. 123-139 ◽  
Author(s):  
I. B. Földes ◽  
R. Sigel ◽  
Chen Shi-Sheng ◽  
K. Eidmann ◽  
R. F. Schmalz ◽  
...  
Keyword(s):  
Heat Wave ◽  
Density Profile ◽  
Wall Motion ◽  
Laser Light ◽  
Cavity Wall ◽  
X Rays ◽  
X Ray ◽  
Outward Motion

Gold cavity targets were irradiated with λ = 0.44 μm laser light at intensities ≤ 2.6 ×1013 W/cm2. The outward motion of the cavity wall was investigated by simultaneous optical and x-ray shadowgraphy. The wall motion is attributed to the pressure generated by an ablative heat wave, driven by the soft x-rays in the cavity. The observed transparency of the cavities for the x-rays used for shadowgraphy allowed the determination of the density profile of the cavity wall which decays possibly due to fragmentation.

Conversion of laser light into x rays in thin foil targets

1990 ◽  
Vol 41 (6) ◽  
pp. 3270-3280 ◽  
Author(s):  
P. Celliers ◽  
K. Eidmann
Keyword(s):  
Laser Light ◽  
Thin Foil ◽  
X Rays
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