The spacecraft need to do vacuum thermal tests in a vacuum chamber before they lunched. The solar simulator can simulate the collimation, uniformity and spectrum of the sunlight accurately, which provides higher precision space thermal external flux in the vacuum thermal tests of spacecraft. These solar simulators usually are installed on the vacuum chambers. Its light source is outside the vacuum chamber, the light incidents into the chamber by the optical vacuum sealed window. In order to get uniformity irradiation testing volume, the off-axis collimating solar simulator is selected which installed on the KM6 large vacuum chamber. The main chamber is vertical to place the test-articles, which has the overall height of 22000mm, the diameter of 16000mm. The auxiliary chamber is horizontally to place the collimating reflector of the solar simulator, which has the overall height of 13000mm, the diameter of 7500mm. Thesolar simulator is included optical system, cooling system and control system. The optical system consists of the collector mirrors, the collimating reflector and the optical integrator. This solar simulator is developed successful, and it has finished a vacuum thermal test of the camera. In the test the irradiance of the solar simulator is 1420W/m2 , it worked more than 100 hours. The test is successful, and gets more valuable experimental data.
In order to meet the experimental requirement of in-situ measurement for spectral reflectance of advanced thermal control coatings, a high accuracy in-situ measurement system for spectral reflectance of thermal control coatings of spacecraft is developed based on dual-beam spectrophotometry. The measurement wavelength range is 200 to 2500 nm, and the measurement accuracy is better than 0.5%. In the space ultraviolet radiation environmental effect test, it can realize the integrated test process of sample delivery, sampling, separation, in-situ measurement of spectral reflectance in vacuum.
A large-scale in-door illumination simulating system was designed and developed by Beijing Institute of Spacecraft Environment Engineering for solar illumination test requirements of a deep-space sensor. Metallic Halide Lamps and Tungsten Halogen Lamps with good accuracy and small collimating angle lanterns, which are high-power and good-match with sunlight, distribute on the wall of the laboratory in order to make good uniformity in an area of 20m×20m. Design results show that, firstly, total average radiation intensity is 400.4W/m2. Secondly, intensity are 48.5W/m2 in 600nm~700nm and 5.1W/m2 in 965nm~995nm. Thirdly, incident angle of the system range from 15° to 45°. Fourthly, uniformity with 15°, 30° and 45° are ±12.4%, ±8.1% and ±14.9% respectively. Finally, shadow profile in the area is clear. The results of acceptance test match the design results very well and meet the requirements totally. The system has been used in laboratory test of the detector successfully.
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