Effect of ambient environment and magnetic field on laser-induced cobalt plasma
Year: 2023
Authors: Khan M.A., Bashir S., Chishti N.A., Bonyah E., Dawood A., Ahmad Z.
Autors Affiliation: Univ Campania Luigi Vanvitelli, Dept Math & Phys, I-81100 Caserta, Italy; Govt Coll Univ GCU Lahore, Ctr Adv Studies Phys CASP, Lahore, Pakistan; Akenten Appiah Menka Univ Skills Training & Entrep, Informat Dept Math Educ, Kumasi, Ghana; Natl Excellence Inst Univ, Dept Phys, Islamabad 04524, Pakistan.
Abstract: Plasma parameters of magnetically confined Cobalt (Co) plasma have been evaluated by using laser-induced breakdown spectroscopy at various laser irradiances, under different ambient pressures of two environments such as Ar and Ne and at different time delays. The effect of laser irradiance on Co plasma is exposed in the presence and absence of a Transverse Magnetic field (TMF) while keeping environmental gas pressure constant, i.e., 10 Torr. For this purpose, Co pellets were exposed to Nd: YAG laser (1064 nm, 10 ns) at various laser irradiances ranging from 1 to 2.9 GW cm(-2). To investigate the impact of background gas pressures, Co pellets were exposed to various pressure varying from 5 to 760 Torr of Ar and Ne. In the case of time delay variation, the Co plasma parameters T-exc and n(e) decrease exponentially. A significantly pronounced effect of the presence of an external TMF of strength 0.9 T on time-integrated Co plasma parameters has been revealed. Plasma parameters T-exc and n(e) are considerably increased in the presence of TMF in both ambient environments because of being constrained to a very small region due to which collisions will be enhanced. Implementation of the 0.9 T TMF on a laser-induced plasma of Co is responsible for the confinement of plasma. The surface morphology of laser-irradiated Co samples was also discussed to confirm the effect of TMF. Fine and uniform structures are observed in samples treated in the presence of TMF by using the SEM technique.(c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Journal/Review: AIP ADVANCES
Volume: 13 (1) Pages from: 15017-1 to: 15017-14
KeyWords: Induced Breakdown Spectroscopy; Optical-emission; Surface Modifications; Tungsten Plasma; Gas; Carbon; Enhancement; Pressure; Confinement; PlumeDOI: 10.1063/5.0118908Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2025-05-18References taken from IsiWeb of Knowledge: (subscribers only)
