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2011-11-11 16:46:19

News from the 53rd Annual Meeting of the APS Division of Plasma Physics Research on the Alcator C-Mod experiment at MIT has made an unexpected connection between two seemingly unrelated but important phenomena observed in tokamak plasmas: spontaneous plasma rotation and the global energy confinement of the plasma. Self-generated flows, the spontaneous plasma rotation which arises even when there is no external momentum input, can have a strong beneficial effect on plasma transport and...

2011-11-11 16:42:28

News from the 53rd Annual Meeting of the APS Division of Plasma Physics A key challenge in producing fusion energy is confining the plasma long enough for the ionized hydrogen to fuse and produce net power. Suppressing plasma turbulence is one approach to this, but the resulting increase in energy confinement is usually accompanied by undesirable increases in particle and impurity confinement, which can lead to plasma contamination and ash accumulation–and reduced power. At MIT's...

2011-11-11 14:17:46

News from the 53rd Annual Meeting of the APS Division of Plasma Physics Tokamaks–a leading design concept for producing nuclear fusion energy–can, under certain rare fault conditions, produce beams of very energetic "runaway" electrons that have the potential to damage interior surfaces of the device. In the event of such a fault, a tokamak-based nuclear fusion power plant will have to employ protection systems to prevent any damage. Now, scientists at the DIII-D National...

2011-11-11 01:51:31

News from the 53rd Annual Meeting of the APS Division of Plasma Physics A fusion reactor operates best when the hot plasma inside it consists only of fusion fuel (hydrogen's heavy isotopes, deuterium and tritium), much as a car runs best with a clean engine. But fusion fuel reactions at the heart of magnetic fusion reactors also create leftovers–helium "ash." The buildup of this helium ash and other impurities can cool the hot plasma and reduce fusion power. Research at the MIT...

2011-11-11 01:49:29

News from the 53rd Annual Meeting of the APS Division of Plasma Physics A major upgrade to the DIII-D tokamak fusion reactor operated by General Atomics in San Diego will enable it to develop fusion plasmas that can burn indefinitely. Researchers installed a movable, 30-ton particle-beam heating system that drives electric current over a broad cross section of the magnetically confined plasma inside the reactor's vacuum vessel. Precise aiming of this beamline allows scientists to vary the...

2011-11-11 01:44:33

News from the 53rd Annual Meeting of the APS Division of Plasma Physics To achieve nuclear fusion for practical energy production, scientists often use magnetic fields to confine plasma. This creates a magnetic (or more precisely "magneto-hydrodynamic") fluid in which plasma is tied to magnetic field lines, and where regions of plasma can be isolated and heated to very high temperatures–typically 10 times hotter than the core of the sun! At these temperatures the plasma is nearly...

2011-11-04 23:05:43

Researchers have used plasma — similar to the form created in neon signs, fluorescent tubes and TV displays — to create water that stays significantly antibacterial and can be used as a disinfectant for at least seven days after becoming plasma-active. Their study, published today, 4 November 2011, in IOP Publishing's Journal of Physics D: Applied Physics, reports on the exposure of water to the cocktail of compounds contained in plasma which subsequently cause it to stay...

Navy's Electromagnetic Railgun Reaches Testing Milestone
2011-11-02 04:35:54

The U.S. Naval Research Laboratory Materials Testing Facility demonstrated, Oct.31, the one-thousandth successful firing of its Electromagnetic Railgun, reaching a materials testing milestone in the weapon's technological development and future implementation aboard U.S. Navy warships. "This test demonstrates continued advances in armature development, rail design, and barrel materials used in high power railgun launch," said Dr. Robert Meger, head, NRL Charged Particle Physics Branch....

2011-10-20 22:36:32

Engineers at Case Western Reserve University have made an electrochemical cell that uses a plasma for an electrode, instead of solid pieces of metal. The technology may open new pathways for battery and fuel cell design and manufacturing, making hydrogen fuel and synthesizing nanomaterials and polymers. A description of the research is now published in the online edition of the Journal of the American Chemical Society at http://pubs.acs.org/doi/abs/10.1021/ja207547b. "Plasmas formed...

2011-09-23 11:51:01

Tecnalia Research & Innovation is undertaking the innovation of casting processes with its "plasma torch." This new system enables great precision when heating the metal, thus reducing operational costs, enhancing metallurgical quality and saving energy. To achieve this end, Tecnalia made use of a High-Powered Thermal Plasma, enabling heating the necessary quantity of metal at the required temperature and at the precise moment of casting, when the molten metal has to be poured from the...


Latest Plasma Reference Libraries

45_7760ecc1c46f19cc327f8ce6904b6250
2013-03-16 00:00:00

Hannes Olof Gösta Alfvén (May 30, 1908 - April 2, 1995) was a Swedish plasma physicist born in Norrköping, Sweden. Alfvén received his PhD from the University of Uppsala in 1934. His thesis was titled "Investigations of the Ultra-short Electromagnetic Waves." He was originally trained as an electrical power engineer and later moved on to research and teaching in the fields of plasma physics. Alfvén made many contributions to plasma physics, including theories describing the...

6_02132514ceb20be8f009384c891c09472
2004-10-19 04:45:41

Heliopause -- The heliopause is the boundary where our Sun's solar wind is stopped by the interstellar medium. The solar wind blows a "bubble" in the interstellar medium (the rareified hydrogen and helium gas that permeates the galaxy). The point where the solar wind's strength is no longer great enough to push back the interstellar medium is known as the heliopause, and is often considered to be the outer "border" of the solar system. The distance to the heliopause is not precisely...

4_5d937e9435f471d0f5354cef6f8fdcda2
2004-10-19 04:45:41

Solar Prominence -- Solar prominences are large arch-shaped structures observable in the solar corona. These often have a twist and occasionally become unstable, ejecting plasma and magnetic flux out from the sun. The physics of solar prominence instability is believed to be governed by magnetic forces and magnetic helicity issues. It is thought that instability occurs when a magnetic flux tube becomes excessively twisted. ----- Click here to learn more on this topic from eLibrary:

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Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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