The effects of mass and pressure of ambient gas on the propagation dynamics of two laser-blow-off plasma plumes created in close proximity are investigated. A time gated fast imaging technique is used for recording the images of the laterally colliding plumes under different experimental conditions. Pressure is varied from 0.1 to 3 mbar in three ambient, i.e., helium, neon, and argon. Emphasis is given on the nature of shock-shock interaction under different ambient conditions. It has been observed that the shock-velocity, shape, strength, and their interactions are strongly dependent on the mass and density of the ambient gases. The role of the interacting shocks and their subsequent reflections on the formation and geometrical shape of the interaction region in different ambient conditions is briefly described.
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April 2016
Research Article|
April 29 2016
Effect of mass and density of ambient gas on the interaction of laser-blow-off plasma plumes propagating in close proximity
Bhupesh Kumar
;
Bhupesh Kumar
a)
Institute for Plasma Research
, Bhat, Gandhinagar 382 428, India
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R. K. Singh;
R. K. Singh
Institute for Plasma Research
, Bhat, Gandhinagar 382 428, India
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Ajai Kumar
Ajai Kumar
b)
Institute for Plasma Research
, Bhat, Gandhinagar 382 428, India
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a)
Present address: Molecular Physics Group, Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
b)
Author to whom correspondence should be addressed. Electronic mail: ajai@ipr.res.in
Phys. Plasmas 23, 043517 (2016)
Article history
Received:
December 25 2015
Accepted:
April 11 2016
Citation
Bhupesh Kumar, R. K. Singh, Ajai Kumar; Effect of mass and density of ambient gas on the interaction of laser-blow-off plasma plumes propagating in close proximity. Phys. Plasmas 1 April 2016; 23 (4): 043517. https://doi.org/10.1063/1.4947539
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