Characterization of laser-produced plasma x-ray sources for use in x-ray radiography
We report the absolute conversion efficiency xi/sub x/ from the incident laser light energy to x-ray photons for laser-produced plasmas. Potential x-ray backlighting (radiography) line sources having photon energies from 1.4 to 8.6 keV are studied as a function of laser wavelength, pulsewidth, and intensity. The laser intensity and pulsewidth range from 10/sup 14/ to 10/sup 16/ W/cm/sup 2/, 100 ps to 2 ns and include incident wavelengths of 1.06, 0.53, and 0.35 ..mu..m. We found that K-shell x-ray line emission xi/sub x/ : (1) decreases with increasing x-ray energy, (2) decreases with increasing laser intensity, (3) decreases rapidly with pulselength, and (4) moderately increases with decreasing laser wavelength. On the contrary, for Au M band emission, at a fixed laser intensity and pulsewidth, xi/sub x/ significantly increases (approx.25 x ) upon decreasing the laser wavelength from 1.06 to 0.35 ..mu..m.
- Research Organization:
- University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5830036
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 54:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LASER-PRODUCED PLASMA
X-RAY RADIOGRAPHY
X-RAY SOURCES
EFFICIENCY
ENERGY DEPENDENCE
EXPERIMENTAL DATA
FREQUENCY DEPENDENCE
LASER RADIATION
MATHEMATICAL MODELS
PHOTONS
X RADIATION
DATA
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EQUIPMENT
INDUSTRIAL RADIOGRAPHY
INFORMATION
IONIZING RADIATIONS
MASSLESS PARTICLES
NUMERICAL DATA
PLASMA
RADIATION SOURCES
RADIATIONS
X-RAY EQUIPMENT
700102* - Fusion Energy- Plasma Research- Diagnostics