Effect of transverse magnetic field on the laser-blow-off plasma plume emission in the presence of ambient gas

Kumar, Ajai; Singh, Raghuraj; Joshi, H. C.

doi:10.1016/j.sab.2011.04.011

Cited by 19 publications

(14 citation statements)

References 24 publications

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“…It can be seen from the spectra that the intensity of the ionic lines increased significantly with B-field presence, while the changes are minimal for neutral lines. Interestingly, for transverse magnetic field case the ionic spectral line does not exhibit any significant change with both, magnetic field and ambient gas (Kumar et al, 2011a;2011b). Figures 5 and 6 show the line intensities of Sn I (563.17 nm) and Sn II (556.19 nm) with distance from the target.…”

Section: Resultsmentioning

confidence: 94%

“…Previous studies employing a LPP expanding into a transverse B field showed that conversion of the plasma thermal energy into kinetic energy, plume confinement, ion acceleration, emission enhancement, plasma instabilities, etc. (Neogi & Thareja, 1999;Rai et al, 2003;Harilal et al, 2004;2005a;2005b;Pagano & Lunney, 2010;Kumar et al, 2011a;2011b;Pandey & Thareja, 2011). A B-field is capable of providing such a control by influencing the dynamics, ionization, and optical properties of a LPP.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of a transverse B-field on the laser-blow-off plasma plume emission also has been studied in the presence of an ambient gas (Kumar et al, 2011a;2011b). Enhancement in the intensity associated with structures was observed in the temporal profile of neutrals, which was strongly dependent on the B-field intensity, distance from the target and background gas pressure.…”

Section: Introductionmentioning

confidence: 99%

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Collimation of laser-produced plasmas using axial magnetic field

Roy¹,

Harilal²,

Hassan³

et al. 2015

Laser Part. Beams

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We investigated the expansion dynamics of laser-produced plasmas expanding into an axial magnetic field. Plasmas were generated by focusing 1.064 μm Nd:YAG laser pulses onto a planar tin target in vacuum and allowed to expand into a 0.5 T magnetic field where the field lines were aligned along the plume expansion direction. Gated images employing an intensified charge-coupled device showed focusing of the plasma plume, which were also compared with results, obtained using particle-in-cell modeling methods. The estimated density and temperature of the plasma plumes employing emission spectroscopy revealed significant changes in the presence and absence of the 0.5 T magnetic field. In the presence of the field, the electron temperature is increased with distance from the target, while the density showed opposite effects.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Collimation of laser-produced plasmas using axial magnetic field

Roy¹,

Harilal²,

Hassan³

et al. 2015

Laser Part. Beams

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show abstract

“…Even though there are reports on expanding plasma in presence of an ambient gas [13] and plasma expanding in the presence of a magnetic field in vacuum [14], only a few reported on plasma expansion dynamics in presence of magnetic field at various ambient gas pressures [15]. The present study helps to understand the dynamics of ionic as well as neutral species in the expanding plasma plume in the presence of magnetic field and its response to various ambient pressures.…”

mentioning

confidence: 78%

Diamagnetic cavitization of laser-produced barium plasma in transverse magnetic field

et al. 2015

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Influence of uniform transverse magnetic field and ambient Ar pressure on the plasma plume produced by Nd:YAG laser ablation of barium has been investigated by time-of-flight optical emission spectroscopy. Experiments were carried out with laser pulse energy of 150 mJ and 0.45 Tesla magnetic field. The time-of-flight profiles showed ambient pressure independent behavior at 6-mm distance from the target, which is attributed to the diamagnetic behavior of the laser plasma. A theoretical model is proposed that may explain the compression of temporal profiles of the ionic lines.

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“…Even though there are several reports on plasma expansion in background gas [18] and in the presence of a magnetic field in a vacuum [16], only a few of them have reported on laser-ablated plasma across an external magnetic field at different ambient gas pressures [19]. In previous studies, the expansion dynamics of LPP with the pressure of air ambient gas in the presence of magnetic field is restricted to relatively low values.…”

Section: Introductionmentioning

confidence: 99%

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

Hussain¹,

Gao²,

Qi³

et al. 2016

Plasma Sci. Technol.

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In this work, we investigated the influence of air gas pressures on the expansion features of nanosecond laser ablated aluminum plasma in the absence and presence of a nonuniform magnetic field using fast photography. A particular emphasis was given to the plume dynamics (shape, size) with the combined effects of ambient gas pressures and an external magnetic field. Free expansion, sharpening effect, and hemi-spherical structures of the aluminum plasma were observed without a magnetic field under different gas pressures. Analysis of the resulting plume images with the combined effects of air gas pressures and a magnetic field show significant changes, such as plume splitting, elliptical geometry changes, radial expansion, and plume confinement. Furthermore, the total size of the plasma plume with a magnetic field was measured to be smaller than the plasma plume without a magnetic field at several background pressures.

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Effect of transverse magnetic field on the laser-blow-off plasma plume emission in the presence of ambient gas

Cited by 19 publications

References 24 publications

Collimation of laser-produced plasmas using axial magnetic field

Collimation of laser-produced plasmas using axial magnetic field

Diamagnetic cavitization of laser-produced barium plasma in transverse magnetic field

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

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