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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="timetraveller" data-source="post: 150961" data-attributes="member: 456"><p>First of all the JWT has to cool down. It and its detectors are designed to work only a few degrees above absolute zero, -273 deg C. You might think that in space that is easy however there is a lot of thermal energy in the solar system, even Sunlight reflected off the Earth or Moon and as there is no air, there cannot be any heat removed by convection. It has to be radiated away. Next the mirror is made up of 18 separate hexagonal mirrors. Each of these can be distorted and tilted to allow them to individually aim at a common focus point. We are talking here about controlling the surfaces to about one millionth of an inch, both in shape and tilt. This all has to be done after the cooling process or thermal expansion of either mirrors or their supporting structures. Patience is the order of the day with all this.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 150961, member: 456"] First of all the JWT has to cool down. It and its detectors are designed to work only a few degrees above absolute zero, -273 deg C. You might think that in space that is easy however there is a lot of thermal energy in the solar system, even Sunlight reflected off the Earth or Moon and as there is no air, there cannot be any heat removed by convection. It has to be radiated away. Next the mirror is made up of 18 separate hexagonal mirrors. Each of these can be distorted and tilted to allow them to individually aim at a common focus point. We are talking here about controlling the surfaces to about one millionth of an inch, both in shape and tilt. This all has to be done after the cooling process or thermal expansion of either mirrors or their supporting structures. Patience is the order of the day with all this. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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