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

研制了用于离子回旋共振能量吸收选择性激发样品原子的辉光放电室。研制的小室可以产生13.56 MHz的射频氦辉等离子体，并用激光烧蚀样品进入等离子体。在本实验中，以铜和铁-铜合金为样品。虽然对等离子体施加了离子回旋共振条件，即72 kHzRF和3 kg磁场附近的扫描，但没有观察到72 kHzRF吸收和Cu2+发射强度的增强。这可以解释如下。氦辉放电管的工作压力约为3Torr。在这种压力下，铜原子与氦原子的碰撞非常频繁。碰撞导致离子回旋共振的射频吸收峰极大地展宽，从而使离子回旋共振选择性激发铜的射频吸收几乎不发生。虽然在氦辉光放电等离子体中离子回旋共振选择性激发铜并不成功，但本研究开发的辉光放电室被命名为“激光烧蚀辅助射频氦辉光放电发射光谱”，并在论文、学术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.