微小碎片加速器同轴枪内等离子体轴向速度研究  

Research on plasma axial velocity generated by small debris accelerator coaxial gun

作　　者：高著秀[1] 冯春华[2] 杨宣宗[2] 黄建国[1] 韩建伟[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院物理研究所,北京100190

出　　处：《物理学报》2012年第14期280-286,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10875167)资助的课题;Project supported by the National Natural Science Foundation of China(Grant No.10875167)

摘　　要：等离子体驱动微小碎片加速器是地面模拟空间微小碎片超高速撞击实验的装置,决定其加速效果的是加速器同轴枪内等离子体轴向速度.采用发射光谱法研究等离子体轴向速度随放电电压和工作气体压强的变化关系.实验结果揭示:轴向速度随着放电电压的增大线性增加,随工作气压的增大而缓慢减小,与数值模拟结果符合.为进一步提高等离子体轴向速度,优化加速器提供了可靠依据.＂Plasma driven micro-particle accelerator＂ is a ground device for simulating impact effects of small debris in space.The particle velocity is determined mainly by axial velocity of plasma in a coaxial gun.Emission spectrometry is used to study the plasma axial velocity at different voltages and gas pressures.The experimental results indicate that axial velocity increases with the increase of discharging voltage,and doesn＇t change significantly with the pressure of working gas,which is consistent with the result of numerical simulation.This result is useful to improve the plasma axial velocity further,and provides an experimental basis for optimizing the accelerator.

关 键 词：发射光谱 碎片加速器 等离子体 多普勒频移 

分 类 号：TL503[核科学技术—核技术及应用]