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Fusion glossary

P

A device that shoots small frozen quantities of hydrogen isotopes at high speed into the inner regions of a hot plasma. This method has some penetration advantages over conventional gas injection.
The fourth state of matter. At extreme temperatures, electrons are separated from nuclei and a gas becomes a plasma - a hot, electrically charged gas. In a star as in a fusion device, plasmas provide the environment in which light elements can fuse and yield energy. Some 99% of the known universe is in the plasma state. Examples of plasmas include the sun, fluorescent light bulbs, and other gas-discharge tubes.    
The electrical current going the long way around the torus.
The orderly process of extinguishing the plasma at the end of a plasma burn pulse, involving reduction of the plasma thermal energy, and reduction of plasma current to zero.
Temperature expressed in Kelvin (thermodynamic temperature) or electron volts (kinetic temperature). A measure of the random kinetic energy (energy of motion) of the ions or electrons present.
Tokamak components which directly interact with the plasma, and are subject to high heat fluxes. In °ÄÃÅÁùºÏ²Ê¸ßÊÖ, this includes the first wall and the divertor.  
Movement in the vertical plane intersecting the plasma torus along projections in that plane of any of the tokamak's nested toroidal flux surfaces.
The magnetic field generated by an electric current flowing in a ring. In toroidal devices, the magnetic field that encircles the plasma axis. (i.e., loops around the torus the short way.)  
Components of a tokamak that assist in stabilizing the plasma. In °ÄÃÅÁùºÏ²Ê¸ßÊÖ, the poloidal field coil system consists of six horizontal coils placed outside the toroidal magnet structure.
Procurement Arrangements are a unique °ÄÃÅÁùºÏ²Ê¸ßÊÖ invention. Each one of these documents governs the procurement of plant systems, components, or site construction and details all the necessary technical specifications and management requirements. The value of each Procurement Arrangement is expressed in °ÄÃÅÁùºÏ²Ê¸ßÊÖ Units of Account (IUAs). About 140 individual Procurement Arrangements are currently planned to implement the work packages for building °ÄÃÅÁùºÏ²Ê¸ßÊÖ.