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Fusion glossary

I

International Atomic Energy Agency, Vienna, Austria. See .

The International Fusion Materials Irradiation Facility/DEMO Oriented NEutron Source (IFMIF-DONES) will be a research infrastructure for the testing, validation and qualification of the materials to be used in future fusion power plants like DEMO (a demonstration fusion reactor prototype). It is under construction now in Granada, Spain, with Spain and Croatia as principal project leads. See .

International Fusion Materials Irradiation Facility, Naka, Japan. Part of the Broader Approach agreement, IFMIF is an international scientific research program designed to test materials for suitability for use in a fusion reactor. Jointly developed by Europe and Japan, IFMIF will use a particle accelerator-based neutron source to produce a large neutron flux, in a suitable quantity and time period to test the long-term behavior of materials under conditions similar to those expected at the inner wall of a fusion reactor. Engineering validation and engineering design activities (EVEDA) are currently underway. See more at .

The point at which a fusion reaction becomes completely self-sustaining. At ignition, fusion self-heating is sufficient to compensate for all energy losses, external sources of heating power are no longer necessary to sustain the reaction.
Atoms of unwanted elements in the plasma usually originating from the surrounding walls.
The in-vessel components comprise the blanket, the divertor, the fuelling and internal pumping systems, the port plugs, the in-vessel coils and diagnostic sensors mounted directly on the vessel.  
An atom which has become charged as a result of gaining or losing one or more orbiting electrons. A completely ionized atom is one that is stripped of all its electrons.
(ICRH) An external mode of heating the plasma through resonant absorption of energy by introducing electromagnetic waves into the plasma at the cyclotron frequency of ions.
The removing or adding of an electron to a neutral atom, thereby creating an ion.

Max Planck Institute for Plasma Physics (IPP) in Germany, home to the ASDEX Upgrade tokamak (Garching) and the Wendelstein 7-X stellarator (Greifswald). See .

One of several versions of the same element, possessing different numbers of neutrons but the same number of protons in their nuclei.
The acronym °ÄÃÅÁùºÏ²Ê¸ßÊÖ (pronounced "eater") is the Latin word for "the way." In choosing this name, the participants in the early Conceptual Design Activities for °ÄÃÅÁùºÏ²Ê¸ßÊÖ (1988-1992) were expressing their common hopes that the project would lead to international cooperation on the development of a new form of energy. (The acronym also originally stood for International Thermonuclear Experimental Reactor—a name that is no longer used.)

International Tokamak Physics Activity. ITPA aims at cooperation in development of the physics basis for burning tokamak plasma physics, covering designs and issues broader than those represented by °ÄÃÅÁùºÏ²Ê¸ßÊÖ. See the ITPA page hosted on the °ÄÃÅÁùºÏ²Ê¸ßÊÖ website.

The cost estimates for the construction and operation phases of the °ÄÃÅÁùºÏ²Ê¸ßÊÖ Project have been quantified using an internal currency called the °ÄÃÅÁùºÏ²Ê¸ßÊÖ Unit of Account or IUA, established in 1989. The basis of conversion from IUA to Euro has been agreed between the Members and is updated each year. Because seven °ÄÃÅÁùºÏ²Ê¸ßÊÖ Members are collaborating to build °ÄÃÅÁùºÏ²Ê¸ßÊÖ, each with responsibility for the procurement of in-kind hardware in its own territory with its own currency, the IUA was devised to measure the value of in-kind contributions consistently over time, and to neutralize market fluctuations.