Research On The Technology Of ICF Multi-laser Coaxal Calibrition In Target Plane

The coaxial deviations of the main(1?,?=1053nm)and simulation(3?,?=351nm)laser light is a important factor of shooting accuracy in inertial confinement fusion(ICF)physical experiment.In SG-III Prototype Facility,The deviations are calibrated by using THG Laser generated by preamplifier one by one.This method is not only inefficient but also get large calibration errors In order to address this problem,we propose a coaxial calibration overall program in target surface,with the advantages of precise and efficient.Ii is an effective solution to detect and correct the coaxial error,and has a good theoretical and practical value.The research comes from the research project(many beam laser target surface coaxial calibration sensor development)of Chinese Academy of Engineering Physics,the specific contents are as follows:1)on the basis of studying on the domestic and international relative technology,and combining with the characters of SG-III laser Facility,the method of multi-laser beams coaxial calibration is proposed.2)Study on the principle of calibration;design the coaxial calibration sensor.3)The method for main and simulated lasers identifying and positioning is presented,a algorithm of segmented nor-liner centroid is presented to improve the accuracy of laser positioning.A method of spatial-temporal coding is presented for laser identifying.4)The coaxial calibration sensor was manufactured tesed.The Experiment results show that the proposed technology roadmap and calibration methods are correct and effective.