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=============================================================== Glossary Part 10: Terms beginning with "J" FREQUENTLY USED TERMS IN CONVENTIONAL FUSION RESEARCH AND PLASMA PHYSICS Edited by Robert F. Heeter, firstname.lastname@example.org Guide to Categories: * = plasma/fusion/energy vocabulary & = basic physics vocabulary > = device type or machine name # = name of a constant or variable ! = scientists @ = acronym % = labs & political organizations $ = unit of measurement The list of Acknowledgements is in Part 0 (intro). ================================================================== JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ # J: variable used to indicate current density $ J: abbreviation for Joule; see entry @ JET: Joint European Torus; see entry @ JT-60, JT-60U: Japan Torus - 60 (Upgrade); see entry > Janus: Early Inertial Confinement laser system at Livermore; used for one- and two-beam laser-target irradiation experiments in 1974 and 1975. > Joint European Torus: Large tokamak next to the Culham Laboratory in Oxfordshire, England, commonly owned by the European Community. First reactor to achieve > 1 MW of fusion power, in 1991. Largest tokamak currently in operation (to the best of the editor's knowledge). > JT-60: A large Japanese tokamak, located north of Tokyo. JT-60U is an "upgrade" to JT-60 now in operation. See also entry in Section 5. $ Joule: SI unit of energy. 1 Joule = 1E7 ergs = 1 Watt of power occurring for one second. 1 Joule is roughly 0.001 BTU and 1 calorie is roughly 4 joules. There are 3.6 million joules in a kilowatt hour. & Joule Heating: See ohmic heating