Spin polarization effect on ignition access condition for D-T and D- sup 3 He tokamak fusion reactors

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Fusion Technology; (United States)

OSTI ID:7275834

Mitarai, O ^[1]; Hasuyama, H ^[2]; Wakuta, Y ^[3]

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1. Kumamoto Inst. of Technology, Dept. of Electrical Engineering, Ikeda 4-22-1, Kumamoto (JP)
2. Kurume Inst. of Technology, Dept. of Physics, 2228 Kamitsu-machi, Kurume (JP)
3. Kyushu Univ., Fukuoka (Japan)

In this paper, ignition characteristics in deuterium-tritium(D-T) and D-{sup 3}He tokamak reactors with spin-polarized fuels are presented by using the ignition access condition based on the generalized saddle point in the representation of ({bar P}{sub ht}{tau}{sup 2}{sub E}, n{tau}{sub E}, T). Enhancement of the D-T fusion cross section due to parallel spin polarization with respect to the magnetic field can reduce the confinement enhancement factor required for reaching ignition by {approximately} 20% if fusion particle loss is not induced by the anisotropic fusion particle distribution. Spin polarization is this effective when a D-T reactor is marginal for ignition. In D-{sup 3}He fusion, it is more advantageous to use spin-polarized fuel in the heating phase than in the case of D-T fusion. The auxiliary heating power to reach ignition, which is rather large for D-{sup 3}He fusion, can be reduced by a factor of 2 to 3 compared with the unpolarized case. The deuterium-deuterium fusion suppression effect, it is exists, does not alter the ignition condition much. Various problems related to the spin polarization scheme are also discussed.

• OSTI ID: 7275834
• Journal Information: Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 21:4; ISSN 0748-1896; ISSN FUSTE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700410* -- Specific Fusion Devices & Experiments-- (1992-)
700480 -- Fusion Technology-- Component Development
AUGMENTATION
BETA DECAY RADIOISOTOPES
BETA RATIO
BETA-MINUS DECAY RADIOISOTOPES
CLOSED PLASMA DEVICES
CONFINEMENT
CROSS SECTIONS
DEUTERIUM
EVEN-ODD NUCLEI
HELIUM 3
HELIUM ISOTOPES
HYDROGEN ISOTOPES
IGNITION
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELDS
Ma
Materials Studies-- (1992-)
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE LOSSES
PLASMA CONFINEMENT
POLARIZED TARGETS
POWER
RADIOISOTOPES
SADDLE-POINT METHOD
STABLE ISOTOPES
TARGETS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TRITIUM
YEARS LIVING RADIOISOTOPES