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Present and future sources of protons and heavy ions. [Medical facilities]

Description: A brief outline of existing medical heavy-ion facilities is given. The beam specifications for future dedicated medical ion accelerators are discussed. Machines capable of delivering dose rates of approximately 1 krad/min in volumes of a few liters are shown to represent existing technology. A cost and performance analysis shows the synchrotrons to be the most economical source for the heavier ions while conventional cyclotrons seem optimal for an exclusive proton facility. It is seen that the … more
Date: September 13, 1976
Creator: Grunder, H. A. & Leemann, C. W.
Partner: UNT Libraries Government Documents Department
open access

Online high sensitivity measurement system for transuranic aerosols

Description: A measurement system for transuranic aerosols has been designed that will be able to withstand the corrosive nature of stack effluents and yet have extremely high sensitivity. It will be capable of measuring 1 maximum permissible concentration (MPC) of plutonium or americium in 30 minutes with a fractional standard deviation of less than 0.33. Background resulting from /sup 218/Po is eliminated by alpha energy discrimination and a decay scheme analysis. A microprocessor controls all data acquis… more
Date: October 13, 1976
Creator: Kordas, J. F. & Phelps, P. L.
Partner: UNT Libraries Government Documents Department
open access

Operation and control of high density tokamak reactors

Description: The incentive for high density operation of a tokamak reactor was discussed. It is found that high density permits ignition in a relatively small, moderately elongated plasma with a moderate magnetic field strength. Under these conditions, neutron wall loadings approximately 4 MW/m/sup 2/ must be tolerated. The sensitivity analysis with respect to impurity effects shows that impurity control will most likely be necessary to achieve the desired plasma conditions. The charge exchange sputtered im… more
Date: September 13, 1976
Creator: Attenberger, S. E. & McAlees, D. G.
Partner: UNT Libraries Government Documents Department
open access

XPS studies of actinide materials. [X-ray photoemission spectroscopy, review]

Description: Applications of x-ray photoemission spectroscopy (XPS) to the study of actinide materials are reviewed. Examples discussed here include the band structures of thorium and uranium metal, the multiplet structure associated with the 5f electron states in oxides of the transuranium elements, the test for temporal configurations in NpO/sub 2/, crystal field splitting of the U 6p/sub /sup 3///sub 2// level in a series of uranyl compounds, mixed oxidation states in Cf/sub 7/O/sub 12/, and a test for t… more
Date: September 13, 1976
Creator: Veal, B. W.; Lam, D. J.; Hoekstra, H. R.; Diamond, H. & Carnall, W. T.
Partner: UNT Libraries Government Documents Department
open access

Blanket design for the mirror fusion/fission hybrid reactor

Description: The evolution of this particular blanket concept is described. The geometry of the mirror reactor blanket and the replacement methods that are employed are described. The sub-module design and its thermal-hydraulic considerations, the nuclear model geometry and compositions, and the nuclear calculational method are described. A brief reference is made to calculational vs. experimental results.
Date: July 13, 1976
Creator: Lee, J. D.
Partner: UNT Libraries Government Documents Department
open access

Fuel cycle problems in fusion reactors

Description: Fuel cycle problems of fusion reactors evolve around the breeding, recovery, containment, and recycling of tritium. These processes are described, and their implications and alternatives are discussed. Technically, fuel cycle problems are solvable; economically, their feasibility is not yet known. (auth)
Date: January 13, 1976
Creator: Hickman, R. G.
Partner: UNT Libraries Government Documents Department
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