Thursday, April 22, 2010

Common plasmas

Plasmas are by far the most common phase of matter in the universe, both by mass and by volume.[4] All the stars are made of plasma, and even the space between the stars is filled with a plasma, albeit a very sparse one. In our solar system, the planet Jupiter accounts for most of the non-plasma, only about 0.1% of the mass and 10−15% of the volume within the orbit of Pluto. Very small grains within a gaseous plasma will also pick up a net negative charge, so that they in turn may act like a very heavy negative ion component of the plasma (see dusty plasmas).

Common forms of plasma include
Artificially produced plasmas
  • Those found in plasma displays, including TVs
  • Inside fluorescent lamps (low energy lighting), neon signs[5]
  • Rocket exhaust and ion thrusters
  • The area in front of a spacecraft's heat shield during reentry into the atmosphere
  • Inside a corona discharge ozone generator
  • Fusion energy research
  • The electric arc in an arc lamp, an arc welder or plasma torch
  • Plasma ball (sometimes called a plasma sphere or plasma globe)
  • Arcs produced by Tesla coils (resonant air core transformer or disruptor coil that produces arcs similar to lightning but with alternating current rather than static electricity)
  • Plasmas used in semiconductor device fabrication including: Reactive Ion Etching, Sputtering, and Plasma Enhanced Chemical Vapor Deposition
  • Laser-produced plasmas (LPP), found when high power lasers interact with materials.
  • Inductively Coupled Plasmas (ICP), formed typically in argon gas for Optical Emission Spectroscopy or Mass Spectroscopy
  • Magnetically Induced Plasmas (MIP), typically produced using microwaves as a resonant coupling method

No comments:

Post a Comment