Plasma Physics

Topics: Plasma, Plasma physics, Fluorescent lamp Pages: 4 (1021 words) Published: May 4, 2011
Plasma Complexity!

Plasma is said to a substance similar to gas in which a certain portion of the particles are ionized. The basic premise is that heating a gas dissociates its molecular bonds, rendering it into its constituent atoms. Further heating leads ionization, turning it into plasma: containing charged particles, positive ions and negative electrons. The presence of a non-negligible number of charge carriers makes the plasma electrically conductive so that it responds strongly to electromagnetic fields. Plasma, therefore, has properties quite unlike those of solids, liquids, or gases and is considered to be a distinct state of matter. Like gas, plasma does not have a definite shape or a definite volume unless enclosed in a container; unlike gas, in the influence of a magnetic field, it may form structures such as filaments, beams and double layers. Some common plasma is stars and neon signs.

Plasma was first identified in a Crookes tube, and so described by Sir William Crookes in 1879.he called it radiant matter but call plasma by Irving Langmuir because it reminded him off blood plasma. Plasmas are by far the most common phase of matter in the universe, both by mass and by volume

Plasma properties and parameters
The plasma approximation: Charged particles must be close enough together that each particle influences many nearby charged particles, rather than just interacting with the closest particle The plasma approximation is valid when the number of charge carriers within the sphere of influence of a particular particle are higher than unity to provide collective behavior of the charged particles. The average number of particles in the Debye sphere is given by the plasma parameter Plasma Perimeter- is a dimensionless number, usually interpreted to be the argument of the Coulomb logarithm, which is the ratio of the maximum impact parameter to the classical distance of closest approach in Coulomb scattering. Coulomb collision is a binary...
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