Affiliation:
1. Laser Fusion Research Center, China Academy of Engineer Physics, Mianyang 621900, China
2. School of Mechanical Engineer, Tsinghua University, Beijing 100084, China
Abstract
In this paper, we investigate the theory of energy distribution when divergent light undergoes harmonic conversion in KDP crystals, and based on this theory, we design and construct a precision measuring instrument for the detuning angle of (KDP) Crystals (MIDC). The device can obtain the detuning angle of the crystal by a single measurement with an average measurement error of 72.78 urad. At the same time, it also has the function of scanning the full aperture of the crystals. Using the MIDC, it is possible to quickly measure the KDP crystal at a single point and quickly scan the crystal detuning angle at full aperture. In addition, we conduct a theoretical study on the variation of detuning angle caused by gravity-influencing factors under online conditions, propose an optimization formula for the offline measurement results of detuning angle, and calculate the optimized values of detuning angle for two kinds of crystals under 45° online conditions. We finally study the error source of the MIDC device, analyze the trend of the influence of positioning errors of the crystal and optical elements on the detuning angle measurement results, and provide theoretical support for the error monitoring and correction of MIDC.
Funder
National Natural Science Foundation of China
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference21 articles.
1. MacGowan, B.J. (2010;, January 16–21). The National Ignition Campaign on NIF. Proceedings of the Conference on Lasers and Electro-Optics 2010, San Jose, CA, USA.
2. Special Topic: Plans for the National Ignition Campaign (NIC) on the National Ignition Facility (NIF): On the threshold of initiating ignition experiments;Lindl;Phys. Plasmas,2011
3. Moses, E.I. (2007, January 9–14). Ignition on the National Ignition Facility. Proceedings of the 5th International Conference on Inertial Fusion Sciences and Applications (IFSA 2007), Kobe, Japan.
4. Overview: Development of the National Ignition Facility and the Transition to a User Facility for the Ignition Campaign and High Energy Density Scientific Research;Moses;Fusion Sci. Technol.,2017
5. The National Ignition Facility and the National Ignition Campaign;Moses;IEEE Trans. Plasma Sci.,2010