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Rail Guns Closer to Reality
emtboy9 writes "Yahoo News is reporting that scientists at Sandia National Labs have created a magnetic pulse gun (rail gun) that can accelerate small aluminum plates at 34 kilometers per second, faster than the Earth travels through space.
The accelerated plates strike a target after traveling only five millimeters, or less than a quarter-inch. The impact generates a shock wave -- in some cases, reaching 15 million times atmospheric pressure -- that passes through the target material turning matter into various states almost instantly (solids into liquids, liquids into gas, and even gas into plasma)."
This is a non-military use. They are using it to simulate conditions deep within giant planets. Also this isn't really a rail gun. For one it doesn't use rails, and the whole aim of this experiment is unrelated to rail guns.
what sig?
This is unneed pendantry. If you are not only able to list off these places as frames of referrence but also think of them in the first place, odds are you already know the answer.
Most sensible people would take it as being the sun spinning around the sun, and leave it there.
Since there is no pleasing you therein, the earth is more or less 149,668,992 km from the sun, which gives a circumfrence of around 940,398,011 km which over 365 days gives 29.8 km/second.
So, there you go, it's around the sun.
I work at Sandia, on this very topic. These are just flyer plate experiments, using the Z-machine's Marx Generators to isentropically accelerate small aluminum flyer plates up to high velocities, in order to better understand the behavior of metals at high pressures/densities/temperatures. This has been around for a while now. The only difference is they've recently attained these higher velocities by having the Marx Generators switch at slightly different times, rather than all at once.
Nothing to see here, move along. (and pay no attention to the man behind the curtain)
The article's title is extremely misleading.
This does not bring rail guns any closer to reality, by which I mean it does not bring military rail guns any closer to reality.
The Z-machine is a hanger-sized experimental device akin to a particle accelerator. This was an experiment designed to study extremely high pressures, such as those thought to have been important in Jovian planetary formation.
Saying that this experiment brings rail guns closer to reality is like saying that the Large Hadron Collider (LHC) at CERN brings PPCs closer to reality.