Effect of Transient Change of Temperature on Large-Aperture Optical Element

Analysis of vibration causes of large aperture wafer under vertical support

“…To ensure accurate experiments, a controlled laboratory environment is established free from acoustic noise and environmental vibrations [7] . Consistency in equipment usage and using identical wafer samples throughout the experiments minimize potential errors.…”

The Numerical Simulation and Experiment on Temperature Field in ICF Driver’s Target Building

“…Additionally, Junwei Zhang, who works in Chongqing University, has established the numerical model of optical stability allocation indexes, and they obtain the stability indexes of every optical component in the equipment. The stability indexes are used as the design requirement for the optical structural stability [3]. Meanwhile, the temperature change is also one of the main influence factors of the stability of the target range structure.…”

“…However, the subtle change of temperature distribution would cause the laser beam offset and the target shoot failed. For example, for the NIF, the tolerance of rotatory angle, coursed by the temperature change, is only 0.24µrad [3] .Through the experimental study for the temperature distribution in the ICF target building, the character of temperature distribution of target building has been obtained by Yi Zhou who is a professor of the college of mechanical engineering of Chongqing University. As the result, the design of the heating ventilation and air conditioning (HVAC) system can maintain the temperature stability throughout the building.…”

“…In this paper, the middle level structure space of the ICF driver's target range as the research object, with the aid of finite element analysis method has been calculated and analyzed for the features of environment temperature distribution in the middle level structure space of the ICF driver's target, and we analyzed the effective factors and control measures to improve the temperature distribution. It is very important for heat resource control and HVAC system design [4].…”