Decades later, a Cold War secret is revealed

For more than a decade they toiled in the strange, boxy-looking building on the hill above the municipal airport, the building with no windows (except in the cafeteria), the building filled with secrets.

Swarm constellation heads north

(PhysOrg.com) -- The three satellites that make up ESA's Swarm magnetic field mission were presented to the media today. Following a demanding testing programme, the satellites were displayed in the cleanroom before they ...

NIST shows how to make a compact frequency comb in minutes

Laser frequency combs-high-precision tools for measuring different colors of light in an ever-growing range of applications such as advanced atomic clocks, medical diagnostics and astronomy-are not only getting smaller but ...

A table top 3D laserprinter for glass microsystems

Dr. Yves Bellouard of the Department of Mechanical Engineering is coordinator of a new European project, Femtoprint, to be started this month. The goal is to design a convenient 3D laser printer that will print microstructures ...

Assembly stand completed for James Webb Telescope flight optics

(PhysOrg.com) -- The cleanroom at NASA's Goddard Space Flight Center in Greenbelt, Md. has received a giant structural steel frame that will be used to assemble the mirrors and instruments of the James Webb Space Telescope.

Instrument integration begins at Goddard on MMS spacecraft

(Phys.org) -- The decks have arrived. Engineers working on NASA'S Magnetospheric Multiscale (MMS) mission have started integrating instruments on the first of four instrument decks in a newly fabricated cleanroom at Goddard ...

Juno Armored Up to Go to Jupiter

(PhysOrg.com) -- NASA's Juno spacecraft will be forging ahead into a treacherous environment at Jupiter with more radiation than any other place NASA has ever sent a spacecraft, except the sun. In a specially filtered cleanroom ...

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Cleanroom

A cleanroom is an environment, typically used in manufacturing or scientific research, that has a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors. More accurately, a cleanroom has a controlled level of contamination that is specified by the number of particles per cubic meter at a specified particle size. To give perspective, the ambient air outside in a typical urban environment contains 35,000,000 particles per cubic meter in the size range 0.5 μm and larger in diameter, corresponding to an ISO 9 cleanroom, while an ISO 1 cleanroom allows no particles in that size range and only 12 particles per cubic meter of 0.3 μm and smaller (see table below).

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