-Caveat Lector-

From: "Jonah Morgan" <[EMAIL PROTECTED]>

(Mainichi Shimbun)

Image at: http://www.mainichi.co.jp/english/news/news01.html

Scientists create zero gravity on Earth

By Hidenori Kujiraoka
Mainichi Shimbun


Mainichi Shimbun
Glass becomes completely spherical in an anti-gravity device developed by a
research team from Tohoku University and a government research institute in
Osaka Prefecture.

 A joint governmental research team has developed a device that can create
an artificial gravity-free state using strong magnets, researchers said
Wednesday.
The experimental device was developed jointly by Tohoku University's
research institute on metal materials in Sendai and the Government
Industrial Research Institute, Osaka, an affiliate of the Ministry of
International Trade and Industry, in Ikeda, Osaka Prefecture.

The device is expected to enable experiments in a weightless state, now
possible only in space, to be conducted on Earth.

Specifically, researchers say they hope that the device can be used to
develop new materials, noting that the structure of matter often changes
when it hardens after being melted in a state of weightlessness.

Furthermore, if substances are melted while floating in a gravity-free
state, they become perfectly spherical and do not mix with impurities stuck
to the inner wall of the container nor harden when the temperature is
lowered beyond their melting points.

Therefore, such experiments in a gravity-free state are expected to lead to
the production of glass of high purity and the development of new materials.
Such experiments are often conducted on space-shuttle missions. However,
space experiments are very expensive and can only be conducted by
astronauts.

According to the research team, the experimental device comprises a
superconducting magnet 400,000 times as powerful as the Earth's magnetism
and a carbon dioxide (CO2) laser.

In developing the device, the team worked with a law stating that so-called
diamagnetic substances (such as glass, water and most organic compounds), if
placed in a magnetic field, become slightly magnetized and display repulsion
force in the opposite direction to the magnetic field.

The device places a substance in a magnetic field so strong that the
substance's repulsion force against the field is equal to natural gravity,
thereby creating a state of zero gravity. The CO2 laser is used to heat the
floating substance above 1,000 degrees Celsius and melt it to make it
perfectly spherical.


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