Brass plasmoid in external magnetic field at different air pressures

Abstract

The behavior of expanding brass plasmoid generated by 266 nm wavelength of Nd:YAG laser in nonuniform magnetic field at different air pressures has been examined using optical emission spectroscopy and fast imaging of plasma plumes. The splitting of the plasma plumes and enhancement of intensity of Cu I at 510.5 nm in the presence of magnetic field at lower pressures are discussed. The threading and expulsion of the magnetic field lines through the plasmoid are correlated with the ambient pressure. The stoichiometry of the plasma plume is not significantly influenced by the magnetic field; however, the abundance of neutral to ionic species of Cu and Zn is greatly influenced by the magnetic field. V C 2013 AIP Publishing LLC.

Combined effects of ambient gas pressures and magnetic field on laser plasma expansion dynamics

“…As the pressure is increased to 1 mbar, plasma density is high (figure 3), the magnetic field lines do not diffuse into the plasma, and only the plasma confinement occurs with no splitting [15]. At a sufficiently high pressure, the ablated material pushes the background ambient gas far from the sample until the pressure inside the plume dominates that of the ambient gas.…”

On the Application of Stark Broadening Data Determined with a Semiclassical Perturbation Approach

“…Stark broadening parameters of Zn I spectral lines [210] have been used for experimental verification of a radiative model of laser-induced plasma expanding into vacuum [211], analysis of optical emission for the optimization of femtosecond laser processing [212], diagnostics of a laser-induced zinc plasma [213], comparison of zinc and cadmium plasma produced by laser ablation [201], spectroscopic characterization of laser ablation brass plasma [214], stoichiometric investigations of laser-ablated brass plasma [215], investigation of laser ablation and deposition of wide bandgap semiconductors and nanostructure of deposits [202], research of photoluminescence of nanoparticles in vapor phase of colliding plasma [216], consideration of the role of laser pre-pulse wavelength and inter-pulse delay on signal enhancement in collinear double-pulse laser-induced breakdown spectroscopy [217], for comparison of optical emission from nanosecond and femtosecond laser produced plasma in atmosphere and vacuum conditions [218], for investigation of dynamics of laser ablated colliding plumes [219], the investigation of brass plasmoid in external magnetic field [220], and research of emission dynamics of an expanding ultrafast-laser produced Zn plasma [221].…”

Regulation of the density distribution of a strongly dissipative plasma by a pulsed magnetic field

“…Controlling the plasma with a magnetic field is of great importance to both theoretical and applied research. The dynamics of the plasma evolution [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], the equilibrium shaped by the magnetic field, the plasma transport [18][19][20][21], and instability [3,16,[22][23][24][25] in the magnetic field are at the core of the theoretical interests. As for application-orientated studies, the magnetic field is usually used as a tool to modify the morphology of the plasma, regulate its parameters, and govern its motion [5,7,15,26].…”