Title:	Dynamics of neutrals and ions in an ultrafast laser produced Zn plasma
Authors:	Smijesh, N. Rao, Kavya H. Philip, Reji
Issue Date:	13-Mar-2015
Publisher:	American Institute of Physics
Citation:	Physics of Plasmas. 2015, Vol. 22. p033509
Abstract:	Optical time of flight dynamics of neutrals and ions in an ultrafast laser produced zinc plasma generated by irradiating a solid zinc target using 100 fs laser pulses is investigated. An acceleration of ions is observed which arises from internal Coulomb forces acting between charged species in the plasma. Some of the fast ions recombine with electrons in the plasma and generate fast neutrals. Plasma plume imaging performed at various ambient pressures indicates adiabatic expansion at lower pressures and plume front deceleration at higher pressures: at lower pressures the plume front-time (R-t) plot displays a linear expansion, shock wave model fits to the data at 5 Torr and at higher pressures the data fits better to the drag model. Furthermore, around an intermediate pressure of 10 Torr, the R-t plot fits to the shock wave model at earlier stages of plasma expansion, while it fits to the drag model at the later stages. These investigations provide relevant information on the acceleration of ions and neutrals in an expanding zinc plasma plume produced by ultrafast laser pulses.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7895
ISSN:	070-664X 1089-7674 (Online)
Alternative Location:	https://doi.org/10.1063/1.4914928
Copyright:	2018 American Institute of Physics
Appears in Collections:	Research Papers (LAMP)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.