Saddle point condition for D minus sup 3 He tokamak fusion reactor

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Fusion Technology; (United States)

OSTI ID:5003545

Mitarai, O ^[1]; Hirose, A; Skarsgard, H M ^[2]

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1. Kumamoto Inst. of Technology, Dept. of Electrical Engineering, Ikeda 4-22-1, Kumamoto 860 (JP)
2. Univ. of Saskatchewan, Dept. of Physics Sasakatoon, Saskatchewan, S7N 0W0 (CA)

In this paper the concept of a generalized ignition contour map, showing {bar P}{sub ht}T{sup 2}{sub E}, NT{sub E}, and T, is used to study the ignition criterion for a D{minus}{sup 3}He fusion reactor with plasma temperature and density profiles. Direct heating scenarios to the D {minus} {sup 3}He ignition regime without the help of deuterium-tritium burning are considered. The machine size and enhancement factor for the confinement time required to reach D {minus} {sup 3}He ignition can be simple determined by comparing the height of the operation path with Goldston L-mode scaling and the height of the generalized saddle point. A confinement enhancement factor of 2 to 3 is required in the case of a large plasma current (30 to 80 MA) in a small-aspect-ratio tokamak. On the other hand, for a small plasma current ({approx lt} 10 MA), large-aspect-ratio tokamak, an enhancement factor of 5 to 6 is necessary to reach ignition. Fuel dilution effects by fusion products and impurities, the confinement degradation effect due to 14-MeV protons, and the operation paths are also considered. To lower the height of the saddle point, and hence the auxiliary heating power, we optimize the fuel composition and examine operation in the hot ion mode.

• OSTI ID: 5003545
• Journal Information: Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 19:2; ISSN 0748-1896; ISSN FUSTE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700200 -- Fusion Energy-- Fusion Power Plant Technology
700205 -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
BARYONS
CONFINEMENT
D-T REACTORS
DIAGRAMS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-ODD NUCLEI
FERMIONS
GOLDSTONE DIAGRAMS
HADRONS
HEATING
HELIUM 3
HELIUM ISOTOPES
HOT PLASMA
ION TEMPERATURE
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
NUCLEI
NUCLEONS
PLASMA
PLASMA CONFINEMENT
PLASMA DISRUPTION
PLASMA HEATING
PROTONS
SADDLE-POINT METHOD
STABLE ISOTOPES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS