Hot-electron characterization from [ital K][alpha] measurements in high-contrast, [ital p]-polarized, picosecond laser-plasma interactions

Journal Article · Mon May 31 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.3431· OSTI ID:6495717

Chen, H; Soom, B; Yaakobi, B; Uchida, S; Meyerhofer, D D ^[1]

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

Strong [ital K][alpha] emission is observed in picosecond laser-plasma interactions with high-intensity-contrast, [ital p]-polarized, picosecond laser pulses. [ital K][alpha] emission from Si substrates overlaid with various thicknesses of Al is compared with a Monte Carlo simulation. The results show that the hot electrons which deposit their energy in the solid material have a 3-keV temperature and carry 10% of the incident laser energy. The shifted [ital K][alpha] emission indicates that the solid is heated to a temperature of 35 eV up to 5000 A from the target surface, which is consistent with the preheat of the hot electrons.

• DOE Contract Number: FC03-92SF19460
• OSTI ID: 6495717
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:22; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
ALUMINIUM
COATINGS
DATA
ELECTRON TEMPERATURE
ELEMENTS
EMISSION SPECTRA
EXPERIMENTAL DATA
HOT PLASMA
INFORMATION
LASER-PRODUCED PLASMA
METALS
NUMERICAL DATA
PLASMA
PLASMA DIAGNOSTICS
POLARIZATION
PULSES
SEMIMETALS
SILICON
SPECTRA
SUBSTRATES
X-RAY SPECTRA