Energy absorption in plasmas produced by intense 10-. mu. m laser radiation

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.326521· OSTI ID:6209047

Villeneuve, D M; Enright, G D; Richardson, M C; Isenor, N R

Results are presented of measurements made of the fractional absorption of short (approx.1 ns) intense (2 x 10/sup 14/ W cm/sup -2/) 10.6-..mu..m laser radiation by plasmas produced from massive plane targets. Two complementary techniques were used: infrared light accounting and plasma calorimetry. The methods are shown to provide consistent results, demonstrating peak absorptions of up to 50%. The beam-polarization and irradiance-angle dependence of the absorption is consistent with a resonance absorption model. Plasma calorimetry also yields a detailed spatial distribution of the particle emission, while infrared calorimetry shows that the scattered laser light distribution is strongly dependent on the polarization of the incident laser beam.

• Research Organization: National Research Council of Canada, Division of Physics, Ottawa, K1A OR6, Canada
• OSTI ID: 6209047
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTION
ABSORPTIVITY
CALORIMETERS
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY ABSORPTION
INFORMATION
INFRARED RADIATION
LASER RADIATION
LASER-PRODUCED PLASMA
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
POLARIZATION
PULSES
RADIATIONS
SPATIAL DISTRIBUTION