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Effect of steady magnetic-field on laser-induced breakdown spectroscopy

机译：稳定磁场对激光诱导击穿光谱的影响

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Effects of a steady magnetic field on the laser-induced breakdown spectroscopy of certain elements (Mn, Mg, Cr, and Ti) in aqueous solution were studied, in which the plasma plume expanded across an external steady magnetic field (similar to5 kilogauss). Nearly 1.5 times enhancement in the line emission intensity was observed in the presence of the magnetic field. The temporal evolution of the line emission showed a significant enhancement in plasma emission between 2- and 7-mus gate delays for Mg in the presence of the magnetic field (5-30 mus for Mn). This enhancement in the emission is attributed to an increase in the rate of recombination because of an increase in plasma density due to a magnetic confinement after cooling the plasma. The increase in the optical line emission due to magnetic confinement was absent when the plasma was hot with a dominant background (continuum) emission. The limits of detection of Mg and Mn were reduced by a factor of two in the presence of a steady magnetic field of 5 kilogauss. (C) 2003 Optical Society of America. [References: 27]
机译：研究了恒定磁场对水溶液中某些元素（Mn，Mg，Cr和Ti）的激光诱导击穿光谱的影响，其中等离子羽流在外部稳定磁场（类似于5高斯）上扩展。在磁场的存在下，线发射强度提高了近1.5倍。线发射的时间演变表明，在存在磁场的情况下，Mg的2到7毫秒门延迟之间的等离子体发射显着增强（Mn的5-30 mus）。发射的这种增强归因于重组速率的增加，这是由于在冷却等离子体之后进行的磁约束导致等离子体密度的增加。当等离子体较热且主要背景（连续）发射时，由于磁性限制而导致的光线路发射没有增加。在5 k高斯的稳定磁场下，Mg和Mn的检出限降低了两倍。 （C）2003年美国眼镜学会。 [参考：27]

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