Plume splitting and sharpening in laser-produced aluminium plasma

Plume splitting and sharpening were observed in laser-produced aluminium plasma created using 532 nm, 8 ns pulses from a frequency doubled Nd : YAG laser. Measurements were made using 2 ns gated fast photography as well as space and time resolved optical emission spectroscopy. The motion of the lead...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2002-11, Vol.35 (22), p.2935-2938
Main Authors: Harilal, S S, Bindhu, C V, Tillack, M S, Najmabadi, F, Gaeris, A C
Format: Article
Language:English
Subjects:
Exact sciences and technology
Optical (ultraviolet, visible, infrared) measurements
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma diagnostic techniques and instrumentation
Plasma production and heating
Plasma production and heating by laser beams
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Summary:Plume splitting and sharpening were observed in laser-produced aluminium plasma created using 532 nm, 8 ns pulses from a frequency doubled Nd : YAG laser. Measurements were made using 2 ns gated fast photography as well as space and time resolved optical emission spectroscopy. The motion of the leading edge of the plume was studied with several background air pressures and the expansion of the plume front was compared with various expansion models. Combining imaging together with time resolved emission diagnostics, a triple structure of the plume was observed.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/35/22/307