Rayleigh-Taylor analysis in a laser-induced plasma

We report the conditions (plasma parameters) under which the Rayleigh-Taylor Instability (RTI) develops in an Al plasma produced by a Nd:Yag pulsed laser with a fluence range of 1 to 4 J/cm2, wavelength of 1064nm and 10Hz repetition rate. The used data correspond to different pressure values of the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.370 (1), p.12063-4
Main Authors: Marin, R A, Gonzales, C A, Riascos, H
Format: Article
Language:English
Subjects:
Aluminum
Delay
Delay time
Drag
Dynamic stability
Fluence
Instability
Laser plasmas
Mathematical models
Neodymium lasers
Perturbation theory
Physics
Plasma (physics)
Pulsed lasers
Stability
Taylor instability
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Summary:We report the conditions (plasma parameters) under which the Rayleigh-Taylor Instability (RTI) develops in an Al plasma produced by a Nd:Yag pulsed laser with a fluence range of 1 to 4 J/cm2, wavelength of 1064nm and 10Hz repetition rate. The used data correspond to different pressure values of the ambient N atmosphere. From previous works, we took the RTI growth rate form as From the perturbation theory the instability amplitude is proportional to e−ηt. Using the drag model, we calculated the plume dynamics equations integrating the instability term and plotted the instability growth profile with the delay time values to get critical numbers for it, in order to show under which conditions the RTI appears.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/370/1/012063