The Effect of an External Magnetic Field on the Plume Expansion Dynamics of Laser-Induced Aluminum Plasma

Atif HUSSAIN; LI Qi (李奇); HAO Zuoqiang (郝作强); GAO Xun (高勋); LIN Jingquan (林景全)

doi:10.1088/1009-0630/17/8/14

Plasma Science and Technology > 2015 > 17(8): 693-698. > DOI: 10.1088/1009-0630/17/8/14

Atif HUSSAIN, LI Qi (李奇), HAO Zuoqiang (郝作强), GAO Xun (高勋), LIN Jingquan (林景全). The Effect of an External Magnetic Field on the Plume Expansion Dynamics of Laser-Induced Aluminum Plasma[J]. Plasma Science and Technology, 2015, 17(8): 693-698. DOI: 10.1088/1009-0630/17/8/14

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The Effect of an External Magnetic Field on the Plume Expansion Dynamics of Laser-Induced Aluminum Plasma

School of Science, Changchun University of Science and Technology, Changchun 130022, China

Funds: supported by National Natural Science Foundation of China (No. 61178022), the Research Foundation for Doctoral Program of Higher Education of China (Nos. 20112216120006, 20122216120009 and 20122216110007) and also the Project of 14KP007

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Received Date: February 10, 2015

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Abstract

Abstract

In this work, we investigated the plasma morphology induced by a Nd:YAG laser with the aim of improving the understanding of the formation and dynamics of the plasma in two cases, with and without a magnetic field. Single laser pulse production of a plasma in the absence and presence of a magnetic field was performed with an aluminum target in air. A fast photography technique was employed to obtain information about the expansion dynamics and confinement of the aluminum plasma in each case. The generation of the laser plasma was allowed to expand at two locations with different magnetic field strengths, which correspond to the strength 0.58 T in the center of two magnetic poles and 0.83 T at a distance of 4 mm from the upper pole (N). The plume showed lateral con?nement at longer delays when the target was placed at the center of the two poles. When the target was placed at a distance of 4 mm from the upper pole it was observed that the plume was divided into two lobes at the initial stage and traveled towards the center of the magnetic field with further elapse of time.
- plasma plume,
- fast imaging,
- magnetic confinement

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References

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