Helium breakdown by DF laser radiation
- 1 June 1981
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 52 (6) , 3851-3854
- https://doi.org/10.1063/1.329849
Abstract
Thresholds have been measured for the breakdown of helium by laser radiation near 3.8 μm in wavelength. Four-μsec chemical laser pulses were focused to a well-defined spot 100 μm in diameter. Values of the instantaneous irradiance qt and the accumulated fluence et occurring at time of breakdown were observed as a function of helium pressure in the range 0.12–0.99 atm. The measured qt was 2.3 ×1010 W/cm2 at 1 atm, in good agreement with results scaled from other wavelengths.This publication has 10 references indexed in Scilit:
- Laser-beam attenuation for spatial profiling of small focal spotsReview of Scientific Instruments, 1980
- Measurement of the wavelength dependence of the threshold of laser-induced gas breakdownJournal of Physics D: Applied Physics, 1979
- Density and potential distributions of the diffusion plasma column in a coaxial cylindrical discharge tubeJournal of Physics D: Applied Physics, 1979
- Ionisation path formation in gases using a laser with retractable focusJournal of Physics D: Applied Physics, 1979
- Threshold conditions for the formation of surface plasmas by HF and DF laser radiationJournal of Applied Physics, 1978
- Photoinitiated F2+H2/D2 chain-reaction laser with high electrical efficiencyJournal of Applied Physics, 1976
- Time-resolved spectroscopy of a pulsed H2–F2 laser with well-defined initial conditionsJournal of Applied Physics, 1974
- Significant loss mechanisms in gas breakdown at 10.6 μJournal of Applied Physics, 1973
- Laser beam induced breakdown in helium and argonJournal of Physics D: Applied Physics, 1971
- Gas Breakdown at Optical FrequenciesPhysical Review Letters, 1963