“In the Tokmark device neutral beam injector, the calorimeter target is responsible for receiving and measuring beam power. The built-in thermocouple array is used to monitor the temperature rise of the target plate in real time and obtain the power density distribution of the extracted ion beam or neutral beam. A calorimeter target was designed on the HL-3 device's second neutral beam injection line, which utilizes a linear push rod mechanism for lifting and lowering, and adopts a "W" - shaped target plate structure for neutral beam energy absorption. Through Ansys Workbench fluid calculation module simulation calculation, the design of the calorimeter target meets the requirements of full power operation, providing reference for engineering design.”