A national team has developed a baseline concept for a Compact Ignition Tokamak (CIT).The CIT mission is to achieve ignition and provide experimental capability to study the! •behavior of burning plasmas. The design uses large magnetic fields on axis (about 10 T) and! large plasma currents (about 9-10 MA). The magnet structure derives high strength from theû se of a copper-Inconel composite plate design in the nose region of the toroidal field (TF), coil and in the ohmic heating solenoid.Inertlal cooling is used; liquid nitrogen' temperatures are established at the beginning of each pulse. Capability is provided to 'Operate either with a divertor or limiter based plasma. The design Is very compact (1.32-m major radius, 0.«3-n> plasma radius), has 16 TF colls, and has 16 major horizontal access ports, about 30 cm by 80 cm, located between TF coils. The schedule is for a construction project to be authorized for the period FY 1988-93. 1, INTRODUCTIONTokamak design studies In the United States have been performed for several years to develop a next-generation tokamak to ignite, to provide a long-pulse burning plasma, and to provide engineering development to form a basis for a demonstration reactor. , During 1985, studies of very compact Ignition devices were undertaken; these devices had major radii in the 1.1-to 1.5-m range.A dominant factor encouraging the focus on compactness was the capital cost to design and construct such a fusion device. These studies were performed by a taam that focused on Ignitor
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