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红外空间观测器(ISO)是一种采用尖端技术的欧洲天文学卫星,它装有大量超低温氦气,由于复杂的低温技术问题尚未解决,原计划在1993年中用阿里安4发射,现已推迟到1994年中。据欧空局的有关人士说,如果在这段时间内超低温氦气技术问题仍不能解决,这颗卫星的发射日期还要推迟。 据有关人士说,ISO技术人员遇到的难题是冷却有效载荷用的超低温液氦输送阀门的间隙大小掌握不住。此外,卫星的光学仪器是在常温环境中制造的,而这些仪器将要在接近绝对零度的环境下工作,这里也有一些技术问题需要解决。 这个观测器长5.3米。观测器上装有约2700升的液氦,一旦
The Infrared Space Observer (ISO) is a state-of-the-art European astronomy satellite equipped with a large amount of ultra-low temperature helium gas that was originally planned to be launched by Arian 4 in 1993 due to a complex cryogenic technical problem that has yet to be resolved By mid-1994 According to an ESA official, the launch date of the satellite will be postponed if the technical issue of cryogenic helium gas can not be solved during this period. According to the source, the challenge for ISO technicians is the inability to grasp the gap size of cryogenic liquid helium delivery valves for cooling payloads. In addition, satellite optics are manufactured at ambient temperatures, and these instruments will be operating near absolute zero. Here are some technical issues that need to be addressed. This observer is 5.3 meters long. The observer is equipped with about 2700 liters of liquid helium, once