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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.”
Yasumasa Tsuji
Fusion Science and Technology | Volume 24 | Number 4 | December 1993 | Pages 366-374
Technical Paper | Plasma Engineering | doi.org/10.13182/FST93-A30187
Articles are hosted by Taylor and Francis Online.
The helical force-free equation, ∇ × B = αB, has been solved analytically in a toroidal coordinates system for a torus of arbitrary aspect ratio without the approximation of a large aspect ratio. The three-dimensional force-free equation is reduced to a scalar Helmholtz equation. A set of analytical solutions for the Helmholtz equation in the torus is presented. With these solutions, the eigenvalues have been obtained for an aspect ratio R/a ≥ 7.5 and toroidal mode number −5 ≤ n ≤ 14. The difference in the eigenvalue between a torus and a cylinder becomes large in the case of a small aspect ratio and a large toroidal mode number. However, the smallest eigenvalues and the corresponding toroidal wave numbers are found to be in close agreement with those of a cylinder for R/a ≥ 1.5.
