Design of a tokamak device with an axisymmetric divertor (DIVA)
From 3rd international symposium on toroidal plasma confinement; Garching, Germany (26 Mar 1973). The objective of the experiment is to study plasma confinement in tokamaks with a noncircular cross section which possess higher stability properties than tokamaks with a circular cross section and to investigate the operation of an axisymmetric divertor and its effect on plasma confinement. A teardrop-like cross section is chosen which provides a deep magnetic well and a large magnetic shear. Evaluation of pumping capability of the divertor was ing results: (1) sticking probability and backscattering ratio of hydrogen ions are good enough to provide adequate pumping; (2) hydrogen gas should be admitted into the chamber by fast-acting valves to keep titanium surfaces fresh before the plasma is produced; (3) sputtering of titanium by hydrogen ions is insignificant; and (4) most uncertain is gas desorption of methane from the titanium surfaces on arrival of hydrogen. (GE)
- Research Organization:
- Japan Atomic Energy Research Inst., Tokai
- NSA Number:
- NSA-29-009228
- OSTI ID:
- 4420948
- Country of Publication:
- Germany
- Language:
- English
Similar Records
Selfconsistent electrostatic field induced by TTMP
High frequency heating in Proto-Cleo