Dependence of the yield of hard incoherent X-rays from femtosecond laser plasma on the atomic number of a target material

Journal Article · Tue Oct 31 04:00:00 EST 2000 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2000V030N10ABEH001828· OSTI ID:21440420

Volkov, Roman V; Gordienko, Vyacheslav M; Savel'ev, Andrei B ^[1]; Mikheev, Pavel M ^[2]

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1. International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)
2. Department of Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)

The yield of hard incoherent X-rays emitted by a dense femtosecond laser plasma is studied as a function of the atomic number Z of the target material. It is shown that for Z values in the range from 14 (Si) to 73 (Ta), the efficiency of laser radiation conversion to X-rays with quantum energy exceeding 8 keV varies as Z{sup 3/2}. The temperature of hot electrons formed in the plasma weakly depends on the atomic number of the target material and is equal to {approx}4 keV for both Si (Z=14) and Ta (Z=73) targets for laser radiation intensities {approx}10{sup 16} W/cm{sup 2}. (interaction of laser radiation with matter. laser plasma)

• OSTI ID: 21440420
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 10 Vol. 30; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATOMIC NUMBER
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
ENERGY RANGE
INCOHERENT SCATTERING
IONIZING RADIATIONS
KEV RANGE
KEV RANGE 01-10
LASER RADIATION
LASER TARGETS
LASER-PRODUCED PLASMA
PLASMA
RADIATIONS
SCATTERING
TARGETS
X RADIATION
YIELDS