Thermal Design and Analysis of a Hard X-Ray Modulation Telescope

摘要

The HXMT is a large on-orbit scientific sensor being developed in China. It is characterized by its large size, its low heat dissipation, the significant environmental heat flux changes in different missions, and the thin MLI mounted on its top surface to reduce hard x-ray energy loss. By using common temperature control hardware, including thermal surface finishes, MLI, heaters, and thermal isolators, thermal control of the HXMT has been accomplished. A numerical model of the HXMT was also built to evaluate the effects of MLI thickness and environmental heat flux changes on the HXMT temperature, and to predict the amount of power required for heating detector cells.