Effect of the position of the external magnetic field applied to a glow discharge plasma on the coherent forward scattering spectra in the Faraday configuration

Effect of the position of the external magnetic field applied to a glow discharge plasma on the coherent forward scattering spectra in the Faraday configuration
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施加到辉光放电等离子体的外部磁场位置对法拉第配置中相干前向散射光谱的影响

DOI:
10.1016/j.sab.2019.105686
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发表时间:
2019
期刊:
Spectrochimica Acta Part B
影响因子:
--
通讯作者:
Hideyuki Matsuta
Hideyuki Matsuta
中科院分区:
--
文献类型:
--
作者:
Manabu Tanaka;Yuta Kugimiya;Takayuki Watanabe;and Tsugio Matsuura;Hideyuki Matsuta

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测量了射频等离子体中Ar I 842.5nm和O I 844.6nm谱线的相干前向散射谱。所使用的CFS光谱仪配备有法拉第配置的可移动的永久环形磁体和二极管激光源。CFS信号主要产生在所施加的最大外部磁场附近。当环形磁体移向辉光放电管的RF供电电极时,在Ar I 842.5nm跃迁的较低状态中的激发氩原子的分析曲线变得非线性,因为这些原子在Ar分压(0.04 Torr(5.3Pa)或更小)下被耗尽。当环形磁铁向接地电极移动时,没有观察到激发的Ar原子的耗尽,导致线性分析曲线。在RF供电的电极处也观察到在O/844.6nm跃迁的较低状态中的激发原子的类似耗尽。
The coherent forward scattering (CFS) spectra of the Ar I 842.5 nm and O I 844.6 nm lines in a radio-frequency (RF) plasma were measured. The CFS spectrometer used was equipped with a movable permanent ring magnet in the Faraday configuration and a diode laser source. The CFS signal was mainly generated near the maximum external magnetic field applied. When the ring magnet was moved toward the RF-powered electrode of the glow discharge tube, the analytical curves of the excited argon atoms in the lower state of the Ar I 842.5 nm transition became nonlinear because these atoms were depleted under the partial Ar pressure (0.04 Torr (5.3 Pa) or less). When the ring magnet was moved toward the grounded electrode, no depletion of the excited Ar atoms was observed, resulting in linear analytical curves. Similar depletion of the excited atoms in the lower state of the O I 844.6 nm transition was also observed at the RF-powered electrode.
电热原子化二极管激光器塞曼和波长调制原子吸收与相干前向散射光谱测定的比较
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