Measurement of laser differential confocal geometrical parameters for ICF capsule

摘要

cqvip:Amethod based on the laser differential confocal principle is proposed formeasurement of the uniformity of the inner and outer radius and shell thickness for an inertial confinement fusion(ICF)capsule.Firstly,thismethod uses the laser differential confocalmeasurement system(LDCS)driven by a precision air-bearing slide to scan andmeasure radially theouter radius,R,inner radius,r,andshell thickness,T,accurately.Secondly,a precision air-bearing rotation system is used to drive the capsule to rotate an angle,u,in sequence,and the LDCS is used tomeasure R,r and T at the corresponding angle.Finally,the uniformity of the ICF capsule’s R,r and T can be calculated by the values of R,r and Tmeasured at the position of each rotation angle.Thismethod provides an approach for achieving high-precision,non-destructive,comprehensive,and rapid measurement of the uniformity of the inner and outer radius and shell thickness of an ICF capsule.Preliminary experiments indicate that measurement precision,using the proposed method for the uniformity of the outer radius,shell thickness and inner radius of the capsule,can reach 7.02×10^(25),5.87×10^(24) and 6.52×10^(25),respectively.