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Kolhāpur, India

Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya
Laser Physics Letters | Year: 2013

The effect of weakly relativistic ponderomotive force in the interaction of cosh-Gaussian laser beams with a plasma is studied. This force modifies the electron density distribution in the plasma. A nonlinear differential equation governing the evolution of the beam width parameter f in the WKB and paraxial approximations is set up using a parabolic equation approach and solved numerically. Self-focusing of a cosh-Gaussian beam is studied at various values of the decentered parameter b. Numerical analysis shows that the b parameter plays a vital role in the propagation characteristics in the plasma. © 2013 Astro Ltd. Source

Navare S.T.,Shivaji University | Takale M.V.,Doodhsakhar Mahavidyalaya | Patil S.D.,Devchand College | Fulari V.J.,Shivaji University | Dongare M.B.,Shivaji University
Optics and Lasers in Engineering | Year: 2012

The authors have investigated impact of linear absorption on self-focusing of Gaussian laser beam in collisional plasma. The nonlinearity in dielectric constant considered herein is mainly due to the elastic electron-ion collisions. A second order differential equation of dimensionless beam width parameter has been derived and solved numerically. It is observed that absorption plays a vital role in self-focusing of laser beams and weakens the stationary oscillatory character of beam-width parameter with distance of propagation. We have also considered the effect of intensity, relative density and parameter characterizing nature of collisions on propagation characteristics. © 2012 Elsevier Ltd. All rights reserved. Source

Patil S.D.,Devchand College | Takale M.V.,Shivaji University | Gill T.S.,Guru Nanak Dev University
European Physical Journal D | Year: 2015

In the present paper, we have studied the effect of light absorption on relativistic self-focusing of Gaussian laser beam propagating through plasma. We have obtained the differential equation for beam width parameter by using parabolic equation approach under the usual WKB and paraxial approximations. The effect of light absorption on the behavior of beam-width parameter, normalized intensity and plasma dielectric function is presented graphically and discussed. It shows that absorption play an important role in weakening the relativistic self-focusing of laser beam during propagation in plasma and gives reasonably interesting results. Graphical abstract: [Figure not available: see fulltext.] © 2015 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg. Source

Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya
Physics of Plasmas | Year: 2014

Habibi and Ghamari have presented a Comment on our paper [Phys. Plasmas 20, 072703 (2013)] by examining quantum dielectric response in thermal quantum plasma. They have modeled the relativistic self-focusing of Gaussian laser beam in cold and warm quantum plasmas and reported that self-focusing length does not change in both situations. In this response, we have reached the following important conclusions about the comment itself. © 2014 AIP Publishing LLC. Source

Shiragave P.D.,Devchand College | Chavan N.S.,Shivaji University
Plant Archives | Year: 2012

The effect of cytokinins, au×ins and coconut milk on multishoots formation from a×illary buds of Momordica dioica was studied. Among the various combinations of growth regulators studied, BAP (1.0 - 2.5mg/l ), NAA (2 mg/l) and coconut milk (10%) in Murashige and Skoogs (1962) medium induced multiple shoots. Ma×imum number of shoots (28.00) were regenerated on MS medium enriched with BAP(2 mg/l) + NAA(2 mg/l) + Coconut Milk (10%). In vitro regenerated shoots develop roots in the MS medium supplemented with IBA (2 mg/l). The regenerated plantlets hardened and successfully transferred to the field. Source

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