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Fusion Science and Technology
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General Kenneth Nichols and the Manhattan Project
Nichols
The Oak Ridger has published the latest in a series of articles about General Kenneth D. Nichols, the Manhattan Project, and the 1954 Atomic Energy Act. The series has been produced by Nichols’ grandniece Barbara Rogers Scollin and Oak Ridge (Tenn.) city historian David Ray Smith. Gen. Nichols (1907–2000) was the district engineer for the Manhattan Engineer District during the Manhattan Project.
As Smith and Scollin explain, Nichols “had supervision of the research and development connected with, and the design, construction, and operation of, all plants required to produce plutonium-239 and uranium-235, including the construction of the towns of Oak Ridge, Tennessee, and Richland, Washington. The responsibility of his position was massive as he oversaw a workforce of both military and civilian personnel of approximately 125,000; his Oak Ridge office became the center of the wartime atomic energy’s activities.”
Gerald Kamelander, Franz Woloch, Gert Sdouz
Fusion Science and Technology | Volume 25 | Number 3 | May 1994 | Pages 241-248
Technical Paper | Alpha-Particle Special / Plasma Engineering | doi.org/10.13182/FST94-A30280
Articles are hosted by Taylor and Francis Online.
Recently, fast alpha-particle-driven kinetic Alfvén waves were investigated by means of a nonlinear turbulent theory, and an analytic expression for the corresponding diffusion coefficient was derived. This diffusion coefficient is introduced in a kinetic alpha-particle transport code based on the solution of a special Fokker-Planck equation by means of a multigroup formalism. The structure of Dα leads to a nonlinear and self-consistent problem. The simulation of realistic International Thermonuclear Experimental Reactor (ITER)-like plasmas by means of a plasma transport code and a description of the anomalous ion and electron transport by the widely accepted Rebut-Lallia model are dealt with. This code is combined with a kinetic alpha-particle transport code to calculate the alpha-particle power deposition profiles to the plasma electrons and the plasma ions. Results are presented for an ignition scenario for ITER-like plasmas. These seem to be the first plasma simulations using a self-consistent alpha-particle transport model. Estimating the effects of anomalous alpha-particle transport is accomplished by repeating each scenario switching off the alpha-particle transport routine and assuming local alpha-particle power deposition. Important physical quantities like density profiles and diffusion coefficients are discussed.
