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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.”
M. Ichimura, H. Higaki, S. Saosaki, S. Kakimoto, Y. Yamaguchi, K. Horinouchi, H. Hojo, K. Yatsu
Fusion Science and Technology | Volume 43 | Number 1 | January 2003 | Pages 69-72
Heating | doi.org/10.13182/FST03-A11963565
Articles are hosted by Taylor and Francis Online.
Three ICRF sources (RF1, RF2 and RF3) are used for the plasma production and heating in the GAMMA 10 tandem mirror. The initial plasma in a standard mode of operation is produced by using RF1 and RF2 with near fundamental ion cyclotron frequencies. Under the present experimental conditions, an eigenmode which has a fundamental radial structure is only excited and the density is clamped so as to satisfy the boundary conditions in the axial direction. When RF3 with a frequency range of high harmonic fast waves is applied, several eigenmodes with different radial structures can be excited and the density clamping is released. Two different frequencies are used in the RF3 system; one is 63 MHz which corresponds to the 10th harmonic ion cyclotron frequency near the midplane of the central cell and the other is 41.5 MHz. The density increase due to the excitation of the high harmonic fast waves are observed in both cases. It is observed the high energy ions are produced due to the higher harmonic resonance.