Energy confinement in Doublet III with high-Z limiters
This report describes the experimental measurements and data analysis techniques used to evaluate the energy confinement in noncircular plasmas produced in Doublet III. Major aspects of the confinement measurements and analysis techniques are summarized. Machine parameters, diagnostic systems and discharge parameters relavent to the confinement measurements are given. Magnetic analysis techniques used to determine the plasma shape are reviewed. Scaling of the on-axis values of electron temperature, confinement time and Z/sub eff/ with plasma density is presented. Comparison with scaling results from other circular tokamaks is discussed. Numerical and analytic techniques developed for calculating the plasma energy confinement time and self-consistent profiles of density, temperature, current, and flux in non-circular geometries are described. These techniques are applied to the data and used to determine the central and global electron energy confinement time for a typical doublet plasma. Additional aspects of the confinement such as the radial dependence of the electron thermal conductivity and the estimated ion temperature are explored with the aid of a non-circular transport simulation code. The results of the confinement measurements are summarized and discussed. A brief summary of the theoretically expected effects of noncircularity on plasma confinement is included for reference as Appendix I.
- Research Organization:
- USAEC Regulatory Staff, Washington, DC
- DOE Contract Number:
- EY-76-C-03-0167M038
- OSTI ID:
- 5332751
- Report Number(s):
- GA-A-15771; TRN: 80-010256
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DOUBLET REACTORS
PLASMA CONFINEMENT
ANALYTICAL SOLUTION
ELECTRON TEMPERATURE
LIMITERS
PLASMA DENSITY
PLASMA DIAGNOSTICS
SCALING LAWS
TRANSPORT THEORY
CONFINEMENT
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production