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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.”
J. M. García-Regaña, F. Castejón, A. Cappa
Fusion Science and Technology | Volume 55 | Number 2 | February 2009 | Pages 219-226
Technical Paper | Electron Cyclotron Emission and Electron Cyclotron Resonance Heating | doi.org/10.13182/FST09-A4074
Articles are hosted by Taylor and Francis Online.
Electron Bernstein waves (EBWs) have been confirmed as a suitable choice for plasma heating and current drive generation (electron Bernstein current drive) at densities where the O and X modes find cutoff values. In the present work, an estimation of the efficiency function of current generated for a relativistic distribution function is presented. The arbitrary large values of the refractive index, due to the EBW propagation properties, have also made necessary the expansion of our calculation up to any Larmor radius order. Particle trapping has been included considering the Okhawa effect, and the fractions of power absorbed by trapped and circulating particles separately have been estimated. Future work toward implementation of this method to the ray-tracing code used for realistic TJ-II ray trajectories (TRUBA) is also discussed.
