Proposal to the United States Energy Research and Development Administration for continuation of fusion reactor technology studies. Progress report, January 1, 1977--September 30, 1977

The tokamak engineering test reactor report was completed and the work is described. Studies of a small, high power density tokamak was started and very early progress is summarized. The problems of rf heating in tokamak reactors are discussed. (MHR

Research and development of improved cavitating jets for deep-hole drilling

Improved cavitating nozzles have been developed as part of an on-going program to increase the rate of penetration of deep-hole drill bits. Based on the four criteria of: incipient cavitation number, amplitude of pressure fluctuation (and hence enhanced structuring of the jet flow), rock cutting, and cleaning chips from the hole bottom - these new, STRATOJET (STRuctured Acoustically Tuned Oscillating JET) cavitating nozzle systems have out-performed both conventional drill bit nozzles and the basic CAVIJET cavitating jets. Although nozzle designs which provide large amplitude pressure modulations are now available for the operation in water, additional research is needed to optimize self-resonating jets for use: (a) in mud, (b) in specific drill bit designs, and (c) at higher system pressures than now currently used for deep-hole drilling