摘要
用剪切干涉仪测量了电缆枪产生的等离子体电子密度分布.在实验中获得了激光波前通过等离子体后的干涉图样,测出等离子体沿轴向的平均运动速度约为2 cm/μs.对干涉图进行了二维波前重建,计算了电子线积分密度,给出了直观的等离子体分布图像,并计算了自由电子总数.根据等离子体的圆柱对称关系,利用Abel积分变换算出了局部电子密度沿径向的分布曲线.
A shearing interferometer system was constructed and applied to electron density measurements of C-gun plasma. The interferograms were obtained after the laser wavefronts passed through the plasma. The average velocity of plasma along its axis is about 2 cm/μs. The two dimensional distributions of line integrated electron density were calculated by wavefront reconstruction of interferograms, which revealed the shape of plasma. By integrating the line density over the whole measuring area, the total number of free electrons was figured out. For the cylindrical symmetric plasma, the local electron densities were calculated by Abel transform.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第12期2192-2195,共4页
Acta Photonica Sinica
基金
中国工程物理研究院基金资助
关键词
剪切干涉
电缆枪
等离子体
电子密度
Shearing interferometry
C-gun
Plasma
Electron density
