Fast imaging of laser-blow-off plume: Lateral confinement in ambient environment

Journal Article · Mon Apr 06 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3111441· OSTI ID:21176099

George, Sony; Nampoori, V P. N. ^[1]; Kumar, Ajai; Singh, R K ^[2]

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1. ISP, Cochin University of Science and Technology, Cochin 682 022 (India)
2. Institute for Plasma Research, Gandhinagar 382 428 (India)

The dynamics of plasma plume, formed by the laser-blow-off of multicomponent LiF-C thin film under various ambient pressures ranging from high vacuum to argon pressure of 3 Torr, has been studied using fast imaging technique. In vacuum, the plume has ellipsoidal shape. With the increase in the ambient pressure, sharp plume boundary is developed showing a focusing-like (confinement in the lateral space) behavior in the front end, which persists for long times. At higher ambient pressure (>10{sup -1} Torr), structures are developed in the plasma plume due to hydrodynamic instability/turbulences.

• OSTI ID: 21176099
• Journal Information: Applied Physics Letters, Vol. 94, Issue 14; Other Information: DOI: 10.1063/1.3111441; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
BOUNDARY LAYERS
FOCUSING
LASERS
LITHIUM FLUORIDES
PLASMA
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA PRODUCTION
PLUMES
THIN FILMS
TURBULENCE