中文摘要：

进行了太阳辐照500米口径球面射电望远镜（FAST）的“太阳灶”问题及温度场的研究。研究结果表明，FAST“太阳灶”问题不仅与反射面反射率、孔隙率、时间点有关，也与馈源舱体的反射率、材料、微波入口直径等因素有关；反射面反射率为0．2、孔隙率0．4时，馈源舱最高温度为47．56℃；反射面最高温度达到68．34℃，时间在14：00。也计算出了形成典型“太阳灶”的时间域，指出，望远镜指向与太阳照射方向之间的夹角大于3．1。时“太阳灶”问题不明显。该研究为FAST的设计和使用提供了弱化、规避、消除“太阳灶”影响的数据和依据。

英文摘要：

The temperature distribution and the ＂solar cooker＂ problem of the five-hundred-meter aperture spherical radio telescope （FAST） were studied in detail. The results show that the ＂solar cooker＂ problem of the FAST is not only relevant to the reflector reflectivity, porosity rate and time point, but also to the reflectivity of the feed cabin, materials, diameter of the microwave inlet and other factors. When the reflector reflectivity is 0.2 and the porosity rate is O. 4, the maximum temperature of the feed cabin is 47.56℃. At the time of 14：00, the temperature of reflector surface reaches the maximum of 68.34℃ When the angle between the dirction of sun light and that of the telescope pointing is more than 3.1 °, the ＂solar cooker＂ problem is not apparent. This work is of practical significance because it provided useful data and scientific bases for design and use of the FAST so as to weak, avoid, and eliminat the harmful effects of the ＂solar cooker＂.