Counterstreaming-ion tokamak neutron source for large area surface radiation studies
A tokamak neutron source that produces a neutron flux approximately 10$sup 13$ n/cm$sup 2$/s over a wall test-area of 30 m$sup 2$ is designed using near state-of-the-art tokamak and neutral-beam injection technologies. To maximize fusion reactivity, D and T plasma ions are grouped in two distinct quasi- thermal velocity distributions, oppositely displaced in velocity along the magnetic axis. Such counterstreaming distributions can be set up by tangential injection of all plasma ions by oppositely directed D and T neutral beams, by facilitating removal of completely decelerated ions, and by minimizing plasma recycling. Fusion energy is produced principally by head-on collisions between D and T ions in the counterstreaming distributions. For injection energies of 40- 60 keV, and typical tokamak parameters, the fusion power density can be approximately 1 W/cm$sup 3$, with Q approximately 1 attainable for T/sub e/ = 3.4 keV and electron energy confinement parameter n/sub e/tau/sub E/ approximately equal to 2 x 10$sup 12$ cm$sup -3$s. All plasma fueling is carried out by the injected beams, and when a significant fraction of the electron population is trapped, the plasma current can be maintained by the beams. (auth)
- Research Organization:
- Princeton Univ., N.J. (USA). Plasma Physics Lab.
- DOE Contract Number:
- E(11-1)-3073
- NSA Number:
- NSA-33-011720
- OSTI ID:
- 4126967
- Report Number(s):
- MATT-1165; CONF-750723-19
- Resource Relation:
- Conference: International conference on radiation test facilities for the CTR surface and materials program, Argonne, Illinois, USA, 15 Jul 1975; Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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700209* -Fusion Energy-Fusion Power Plant Technology- Component Development & Materials Testing
*NEUTRON SOURCES
*THERMONUCLEAR REACTOR MATERIALS- MATERIALS TESTING
*TOKAMAK DEVICES- NEUTRON SOURCES
ION BEAMS
NEUTRON FLUX
SURFACES