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Author Andreev, Sergei N. ♦ Kazantsev, S. Yu ♦ Kononov, I. G. ♦ Pashinin, Pavel P. ♦ Firsov, K. N.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ATMOSPHERIC PRESSURE ♦ BOILING ♦ CAVITIES ♦ HYDROFLUORIC ACID ♦ INTERACTIONS ♦ LASER RADIATION ♦ LASERS ♦ LIFETIME ♦ MATHEMATICAL MODELS ♦ PULSES ♦ SIGNALS ♦ SURFACES ♦ VAPOR PRESSURE ♦ WATER ♦ ELECTROMAGNETIC RADIATION ♦ FLUORINE COMPOUNDS ♦ HALOGEN COMPOUNDS ♦ HYDROGEN COMPOUNDS ♦ INORGANIC ACIDS ♦ INORGANIC COMPOUNDS ♦ OXYGEN COMPOUNDS ♦ PHASE TRANSFORMATIONS ♦ PHYSICAL PROPERTIES ♦ RADIATIONS ♦ THERMODYNAMIC PROPERTIES
Abstract Generation of an electric signal is investigated when a HF-laser pulse interacts with the lower surface of a water column in a cell with a bottom transparent to laser radiation, while the upper surface of the water column remains open. The electric signal exhibits a temporal structure of two spikes spaced by time {tau} which is linearly dependent on the laser output energy. It is found that the value of {tau} (up to 1.3 ms) is an order of magnitude greater than the time during which the vapour pressure in a cavity produced due to the volume explosive boiling of water in the exposed area is greater than the atmospheric pressure. The second spike was determined to appear upon the collapse of the vapour cavity. A mathematical model is constructed that explains the motion of the water column above the vapour cavity taking into account the temporal evolution of the vapour pressure above it. It is shown that the prolonged lifetime of the vapour cavity after the decrease in the vapour pressure down to the atmospheric value is caused by the inertial motion of the water column acquiring the velocity at the initial stage of the cavity expansion. The calculated time of the water column motion agrees well with the experimental time interval between the spikes of an electric signal. (interaction of laser radiation with matter)
ISSN 10637818
Educational Use Research
Learning Resource Type Article
Publisher Date 2009-02-28
Publisher Place United States
Journal Quantum Electronics
Volume Number 39
Issue Number 2


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