最新消息
最新消息


Space Telescope by their own bad taste smoked how to do?

Like a new car, a new telescope also has its own unique taste. But unlike cars, binoculars delicate scent is enough to light which undermine its highly sophisticated components, by his own fart exhaust smoke die, so NASA is less so to protect the fragile space telescope itself from injury.
 
The new material will release gas, releasing volatile organic compounds, quickly dispersed the surrounding environment. Outgassing new car residual solvent mixture to form a unique, occasionally delightful new car smell, which may not be particularly healthy, but what does not cause critical damage. But the space telescope, this outgassing is terrible.
 
In the Space Telescope and other spacecraft delicate manufacturing process, the solvent will outgas, epoxy, lubricants and other materials will be released gases are easily damaged precision machine. Determined to protect the telescope mirrors, thermal control unit, electrical box, detectors, solar cell array and cryogenic instrumentation NASA engineers are always looking for new ways to prevent pollution.
 
In the latest results of efforts to Sharon Straka NASA Goddard and Mark Hasegawa headed by a low-cost, easy-to-Busch paint. The paint absorption outgassing molecules and prevent them from hanging onto a fragile instrument and its components. The molecules adsorbed coating (MAC) is a zeolite with spray coating bonded to colloidal silica binder made.
 
Zeolite is a common mineral, its porous properties of high permeability and gas adsorption live release of contaminants, and the lack of anything that would cause its own problems outgassing of volatile organic compounds. The paint can be applied directly to the surface, no additional fixing facility, and can be used to coat the tape, and then strategically housed around the instrument.
 
Recently, several spray paint test panels such as pollution mitigation tools are installed the chamber A. A chamber is NASA's thermal vacuum space simulator, is the world's largest of its kind in the test equipment. It is with a diameter of 16.8 meters (55 feet), 27.4 meters high (90 feet) room, NASA Apollo program of warehouse space is here on manned and unmanned test, and has already tested • James Webb Space Telescope has been upgraded.
 
These panels are pre-installed in the chamber A, • prepare for the upcoming James Webb Space Telescope's first optical ground support equipment (OGSE-1) test. The paint will capture any outgassing of contaminants from the test chamber to protect the telescope outside. NASA engineers Nithin Abraham explained:
 
Although we can not prevent outgassing of contaminants in the vacuum chamber, we can try to use MAC catch them before they arrived in the test chamber expensive hardware. While NASA is clearly trying to ensure that its testing room clean and bright, clear any object may damage the instrument being tested, some of the silicon-based organic pollutants or not anti-defense. Now, even though these components outgassing of volatiles will hopefully be trapped MAC panel rather than migrate and deposit Webb telescope's optical surface.
 
The coating is an improvement over the prior art, older technology, but the use of the same zeolite mineral coated cordierite, which is a means to create a spherical ice, for the manufacture of ceramic mineral. However, as Hasegawa complained, "These devices big, heavy, and thick, and take up a lot of places," and the shape is more flexible and lighter compared to zeolite coating alternatives they are not ideal. Coating bonded to aluminum, stainless steel and any other metal coated with a silicate salt, which is the most common telescopes and spacecraft structural materials. New paint and even other coating slurry experiments about five times the absorption capacity, making it more useful space applications, because each gram will increase launch costs. Paint is cheaper than the other current alternative electronic bake box.
 
Repeated in the next calculation, Straka want to adjust the coating composition to further enhance the adsorption of volatiles, and may be made of black, it also can absorb stray light. This will add another feature to protect the telescope sensor being flooded more 余光子 noisy during the observation period. The team is also testing the mixed paint systems and high surface area, such as velvet and fiber mat, trying to further increase the absorption capacity, at the same time to prevent electrostatic discharge.
 
In the future, this coating can transcend ground test chamber is incorporated directly the telescope structure to provide continuous protection. They can even help in space life a little more livable, quick coat of paint in the international space station crew quarters to capture pollutants and odors. In a closed space is no washing machine, any reduction in the space habitat stench of things that are necessary for a good idea.
 
Epoxy resin Coating