Hussain Atif, Iqbal Syeda Tehreem, Shahbaz Rana Muhammad, Zafar Mubeen, Arshad Arslan Ali, Aslam Komal, Mukhtar Maria
Department of Physics, The University of Chenab, Gujrat, 50700, Pakistan.
Department of Physics, The University of Lahore, Gujrat Campus, Gujrat, 50700, Pakistan.
Heliyon. 2022 Sep 14;8(9):e10563. doi: 10.1016/j.heliyon.2022.e10563. eCollection 2022 Sep.
Externally variable magnetic field was incorporated with the combination of laser induced breakdown spectroscopy (LIBS) to enhance the emission characteristics of aluminum (Al) plasma. Significant emission enhancement of laser induced plasma (LIP) was obtained at different magnetic field strengths, for instance, enhancement factors of about 1.2, 1.3 and 1.4 times were observed at field-strength of 0.4, 0.5 and 0.6 T, respectively. The electron-impact excitation rates and recombination process were increased at higher field-strengths, which led to the higher emission signal due the stronger plasma confinement by the field. The electron number density and electron temperature were measured using the spectroscopic techniques at several delay times. At higher field strengths, both electron density and electron excitation temperature showed an increased trend as compared to the case when No-field was applied. Hence, the research has significance for enhancing the plasma signal which led to improve the LIBS sensitivity.
将外部可变磁场与激光诱导击穿光谱法（LIBS）相结合，以增强铝（Al）等离子体的发射特性。在不同磁场强度下，激光诱导等离子体（LIP）的发射显著增强，例如，在0.4、0.5和0.6 T的场强下，分别观察到增强因子约为1.2、1.3和1.4倍。在较高场强下，电子碰撞激发率和复合过程增加，由于磁场对等离子体的更强限制，导致发射信号更高。使用光谱技术在几个延迟时间测量了电子数密度和电子温度。与不施加磁场的情况相比，在较高场强下，电子密度和电子激发温度均呈现上升趋势。因此，该研究对于增强等离子体信号从而提高LIBS灵敏度具有重要意义。
