Structural optimization of Nd:YAG laser chamber under thermal and mechanical loads for sealing of the lapped surfaces

The Nd:YAG laser chamber is heated due to the passage of the laser beam and its strength requires overcoming thermal stresses and maintaining the mechanical properties of the material. To prevent heat accumulation, the chamber is cooled by a water channel. In this research, the sealing of the channel is done by applying force in two clamps located at the YAG, according to the special conditions and the necessity of not disturbing the passage of the beam. By increasing the applied force, the quality of sealing increases, but the need to prevent the failure of parts limits this increase in force. Calculating the optimal arrangement of forces for the maximum forces applied to the system in terms of geometrical and behavioral constraints to maximize the sealing performance is the innovative aspect of this research. The YAG parametric model was extracted and with targeted analysis, a model with uniform stress distribution was obtained, which led to the design of the model with the maximum applicable force. The maximum force used for sealing was calculated to be 401N. The optimal force ratio in screws was 60%. By reducing the probability of failure, the presented method reduces the cost and increases the sealing performance and can be used in similar cases.