摘要
在惯性约束聚变(ICF)研究过程中,焦面上聚焦光斑形态要求极为苛刻。基于离线测试平台,从实验上研究了各种应用误差对连续相位板(CPP)远场焦斑能量集中度的影响。得出光束旋转误差、口径误差、平移误差和倾斜误差在可控范围内CPP远场焦斑能量集中度均高于95%,其波动范围小于0.5%,CPP的容忍度较强。而实验畸变波前属于空间频率小于0.02mm-1的低频波前,严重影响了CPP的整形能力,波前畸变是影响能量集中度高于90%的主要因素。
In inertial confinement fusion （ICF） research process, the form of focal spot is extremely crucial. Especially in the indirect driven implosion, energy circled fraction is higher than 95 % in focal spot. Based on the offline test platform, the focu- sing spot of continuous phase plates with different application error is clearly imaged on CCD. By experimental analysis, it is found that the beam rotation error, caliber error, translational error and inclination error have a high tolerance in affecting focal plane of CPP. Energy circled fraction is higher than 95%, the range is less than 0.5%. Nevertheless, the waterfront aberration seriously affects the shaping ability of the CPP. Clearly, the main factor of reducing energy circled fraction to less than 90% is waterfront aberration.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第12期3297-3300,共4页
High Power Laser and Particle Beams
关键词
连续相位板
误差分析
能量集中度
continuous phase plates
error analysis
energy circled fraction
