Surface damage and thermal effects from transient thermonuclear radiation in inertial confinement fusion reactors

Author: Hunter, T. O. (Thomas O.)
Published: United States : [publisher not identified], 1978.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1978.
Physical Description: microfiche : negative ; 11 x 15 cm
Additional Creators: Kulcinski, G. L.

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Summary

A general model for transient deposition of thermonuclear radiation has been developed and applied to calculate the response of copper to a reference spectrum typical of laser fusion reactors. At 7 meters from a 100 MJ pellet, temperature excursions of approximately 700/sup 0/C above the ambient temperature are noted for both photons and ions, occurring 0.02 and 2 microseconds after the thermonuclear burn respectively. Total displacement rates approach 100 dpa/sec at the surface and 500 dpa/sec at 1 micrometer into the copper. Filling the chamber with Ne at 0.5 Torr was found to be sufficient to reduce the temperature excursion in copper by 50% and the dpa rate at the front surface by 25%. The combination of surface temperature transients and ion bombardment were found to increase the sputtering yield by a factor of 6 over ambient temperature values indicating that previous calculations may have seriously underestimated the sputtering damage in laser fusion first walls.

Report Numbers

SAND-78-0674C; CONF-780431-1

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: EY-76-C-04-0789
OSTI Identifier 7079802
Research organization: Wisconsin Univ., Madison (USA).

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