Optical emission- mass correlation spectrometry for specific ion in glow discharge plasma by ion cyclotron resonance.

研制了利用离子回旋共振吸收能量选择性激发样品原子的辉光放电电池。该细胞可产生射频（13.56MHz） He辉光等离子体，并采用激光烧蚀将样品引入等离子体。本实验以Cu和Fe-Cu合金为样品。虽然在等离子体中施加了Cu^+的离子回旋共振条件，即72kHz RF和3kG左右磁场的扫描，但没有观察到72kHz RF的吸收和Cu^+发射强度的增强。这可以解释如下。He辉光放电管的工作压力约为3托。在这个压力下，Cu^+和He原子之间的碰撞非常频繁。碰撞使离子回旋共振的射频吸收峰大幅展宽，导致选择性激发Cu^+的射频吸收几乎不发生。虽然离子回旋共振在He辉光放电等离子体中选择性激发Cu^+没有成功，但本研究开发的辉光放电电池被命名为“激光烧蚀辅助射频He辉光放电发射光谱”，并在论文、讲座会议和国际会议上发表。

The glow-discharge cell was developed for the selective excitation of sample atoms by ion cyclotron resonance energy absorption. The developed cell could generate an RF (13.56MHz) He glow plasma and laser ablation was used for sample introduction into the plasma. In this experiment, Cu and Fe-Cu alloy were used as a sample. Although ion cyclotron resonance conditions of Cu^+, i.e. 72kHz RF and sweep around 3kG magnetic field was applied to the plasma, neither 72kHz RF absorption nor enhancement of Cu^+ emission intensity was observed. This may be explained as follows. Working pressure of the He glow discharge tube was about 3 Torr. Collision between Cu^+ and He atom occurred very frequently at this pressure. The collisions resulted in the broadening of RF absorption peak of ion cyclotron resonance very much, and then the absorption of the RF for selective excitation of Cu^+ hardly took place.Although selective excitation of Cu^+ by ion cyclotron resonance in the He glow discharge plasma was not successful, the glow discharge cell developed in this study was termed "laser ablation assisted RF He glow discharge emission spectrometry" and it was published in paper, in lecture meeting and in international conference.