11 research outputs found
Assessing Attachment to Parents and Peers in Middle Childhood: Psychometric Studies of the Portuguese Version of the People in My Life Questionnaire
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Initial results from FRC (field-reversed configuration) compression experiments on FRX-C/LSM
After more than two years of preparation, high-power FRC compression heating studies are now underway on the Los Alamos FRX-C/LSM facility. Field-reversed configuration plasmas are formed and translated out of the {theta}-pinch source, and into a compressor where the external B-field can be increased from 0.4 to 2 T in 55 {mu}s. A principal experimental goal is to study FRC confinement at the high energy density, n(T{sub e} + T{sub i}) {le} 1.0 {times} 10{sup 22} keV/m{sup 3}, associated with the large external field. In this paper, we report on the first experiments which were performed between April and July, 1989. 9 refs., 5 figs
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Tilt stability and compression heating studies of field-reversed configurations
The first observations of internal tilt instabilities in field-reversed configurations (FRCs) are reported. Detailed comparisons with theory establish that data from an array of external magnetic probes are signatures of these destructive plasma instabilities. This work reconciles theory and experiments and suggests that grossly stable FRCs are restricted to very kinetic and elongated plasmas. Self-consistent three-dimensional numerical simulations demonstrate tilt stabilization by the addition of a beam ion component. High-power compression heating experiments with stable equilibrium FRCs are also reported. Plasmas formed in a tapered theta-pinch coil have been translated along a guide magnetic field into a new single-turn compression coil where the external field is increased up to 7 times the initial value in 55 {mu}s. Substantial heating is observed accompanied by a decrease in confinement time. 17 refs