Sony, George; Ajai, Kumar; Singh, R K; Nampoori, V P N(American Institute of Physics, 2009)
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Abstract:
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 (> 10−1 Torr ), structures are developed in the plasma plume due to hydrodynamic
instability/turbulences.