We describe experimental results for a new type of collective accelerator based on magnetically confined compact torus (CT) plasma rings and discuss applications to both inertial and magnetic fusion. We have demonstrated the principle of CT acceleration in the RACE device with acceleration of 0.5 mg ring masses to 400 km/s and 0.02 mg ring masses to 1400 km/s at greater than or equal to30% efficiency. Scaling the CT accelerator to the multi-megajoule level could provide an efficient, economical driver for inertial fusion (ICF) or magnetically insulated inertial fusion. Efficient conversion to x-rays for driving hohlraum-type ICF targets has been modeled using a radiation-hydrodynamics code. At less demanding conditions than required for ICF, a CT accelerator can be applied to fueling and current drive in tokamaks. Fueling is accomplished by injecting CTs at the required rate to sustain the particle inventory and at a velocity sufficient to penetrate to the magnetic axis before CT dissolution. Current drive is a consequence of the magnetic helicity content of the CT, which is approximately conserved during reconnection of the CT fields with the tokamak. Major areas of uncertainty in CT fueling and current drive concern the mechanism by which CTs will stop in …

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Determining the age of groundwater from monitoring wells can greatly aid in understanding a hydrologic system. Groundwater dating techniques have been used to estimate residence times ranging from about 1000 to 50,000 years. While such measurements have been very useful in hydrothermal and geochemical studies and in the development of groundwater supplies, they have been of limited use in contaminant studies associated with shallow groundwater systems since residence times are often much less than 1000 years.

Determining the age of groundwater from monitoring wells can greatly aid in understanding a hydrologic system. Groundwater dating techniques have been used to estimate residence times ranging from about 1000 to 50,000 years. While such measurements have been very useful in hydrothermal and geochemical studies and in the development of groundwater supplies, they have been of limited use in contaminant studies associated with shallow groundwater systems since residence times are often much less than 1000 years.

This paper describes a design study which establishes the physical parameters of the low energy beam transport, radiofrequency quadrupole, and linac, using computer programs available at Fermilab. Beam dynamics studies verify that the desired beam parameters can be achieved. The machine described here meets the aforementioned requirements and can be built using existing technology. Also discussed are other technically feasible options which could be attractive to clinicians, though they would complicate the design of the machine and increase construction costs. One of these options would allow the machine to deliver 2.3 MeV protons to produce epithermal neutrons for treating brain tumors. A second option would provide 15 MeV protons for isotope production. 21 refs., 33 figs.

Funeral program for Bro. Luttrell O. "Sully" Sullivan, Sr., born March 27. The funeral was held August 26, 1988 at Trinity Baptist Church, officiated by Dr. George Stewart. Funeral arrangements were made through Sutton-Sutton Mortuary, Inc. and he was buried in MeadowLawn Memorial Park in San Antonio, Texas.

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