CAJ | 학술논문

惯性约束聚变(ICF)系统打靶对焦斑的大小及能量分布均匀性都有明确的要求，在连续相位板设计过程中要同时兼顾这两个方面。研究了连续相位板的面形与远场焦斑光强均匀性间的关系，从理论上推导了元件表面调制深度与焦斑尺寸的关系，并进行了定量计算。结果表明，焦斑半径随连续相位板的面形调制深度线性增加。鉴于连续相位板具有的随机特性，比较了不同相位板远场特性的区别，研究了面形调制深度对其光强峰谷值和均方根值的影响，结果表明不同设计的连续相位板，远场特性有较大的不同。当面形调制深度在5~15个波长时，焦斑具有较低的光强峰谷值和均方根值，连续相位板具有较好的束匀滑效果。
관성약속취변(ICF)계통타파대초반적대소급능량분포균균성도유명학적요구，재련속상위판설계과정중요동시겸고저량개방면。연구료련속상위판적면형여원장초반광강균균성간적관계，종이론상추도료원건표면조제심도여초반척촌적관계，병진행료정량계산。결과표명，초반반경수련속상위판적면형조제심도선성증가。감우련속상위판구유적수궤특성，비교료불동상위판원장특성적구별，연구료면형조제심도대기광강봉곡치화균방근치적영향，결과표명불동설계적련속상위판，원장특성유교대적불동。당면형조제심도재5~15개파장시，초반구유교저적광강봉곡치화균방근치，련속상위판구유교호적속균활효과。
The ICF system has strict requirements on the focal spot size and intensity distribution uniformity during the de-sign process of continuous phase plate(CPP).The relationship between CPP’s surface and the light intensity uniformity of far field focal spot is studied,and the influences of CPP’s surface modulation depth on the size of focal spot are analyzed and calculat-ed theoretically.Results show that the growth of the radius of focal spot is in direct proportion to the increase of the surface mod-ulation depth of CPP.For the sake of random behavior of CPP,the difference of far field characteristics between CPPs is com-pared,and the influences of modulation depth on the peak-valley and root mean square value of light intensity are studied,which shows that the differently designed CPP has different behavior in far field.When the modulation depth is around 5λto 1 5λ,the fo-cal spot could have a relatively low peak-valley and low root mean square value,which means that the CPP is in good smoothing performance.