同轴枪脉冲放电等离子体输运过程中密度变化的实验研究

发布时间：2019-07-06 21:14

【摘要】：同轴枪放电等离子体具有密度高、输运速度快等特点,在核物理、航天工程等领域具有广阔的应用前景,已成为国际前沿研究热点.同轴枪中的等离子体密度是反映其应用特性的重要参数之一,因此等离子体密度在输运过程中的变化对理论研究和实际应用都具有重要意义.利用发射光谱法测量了H_β谱线的Stark展宽,从而计算出同轴枪放电等离子体密度在输运过程中的变化.结果显示,当电源注入能量为1.08 kJ、同轴枪内空气气压为4.0Pa时,等离子体密度在输运过程中不断增加;相同能量注入条件下,当同轴枪内空气气压增加至10 Pa时,等离子体密度在输运过程中出现了先增加后减小的趋势;当电源的注入能量达到7.68 kJ时,等离子体密度在10 Pa气压条件下输运时也出现了一直增加的现象.此外,当同轴枪内的工作气体变为氩气时,在注入能量为1.08 kJ、枪内气压4.0 Pa条件下,等离子体密度在输运过程中一直减小.
[Abstract]:Coaxial gun discharge plasma has the characteristics of high density and fast transport speed. It has a broad application prospect in nuclear physics, space engineering and other fields, and has become a hot research topic in the world. The plasma density in coaxial gun is one of the important parameters to reflect its application characteristics, so the change of plasma density in the transport process is of great significance to both theoretical research and practical application. The Stark broadening of H _ 尾 spectral lines has been measured by emission spectroscopy, and the variation of plasma density during coaxial gun discharge has been calculated. The results show that when the air pressure in the coaxial gun is 4.0Pa, the plasma density increases continuously during the transport process, and under the same energy injection condition, when the air pressure in the coaxial gun increases to 10 Pa, the plasma density increases at first and then decreases in the transport process. When the injection energy of the power supply reaches 7.68 kJ, the plasma density also increases when the plasma density is transported at 10 Pa pressure. In addition, when the working gas in the coaxial gun becomes argon, the plasma density decreases during the transport process when the injection energy is 1.08 kJ, gun pressure 4.0 Pa.
【作者单位】：大连理工大学物理与光电工程学院三束材料改性教育部重点实验室;
【分类号】：O53

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