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Analysis of Carbon-Bearing Materials for Use as First Wall Armor in the High Average Power Laser (HAPL) Chamber

T. A. Heltemes, G. A. Moses

Fusion Science and Technology / Volume 56 / Number 1 / Pages 470-474

July 2009


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The characterization of lifetime-component capabilities of various chamber armors is a critical path to the development of the High Average Power Laser (HAPL) reactor design. Previous studies have examined tungsten as an armor material to protect the low-activation ferritic steel first wall from x-ray and ion damage.

Carbon-bearing materials are of interest as candidate armor materials due to their desirable thermal and mechanical properties. This analysis examines and compares several carbon-bearing materials: silicon carbide, graphite, engineered graphitic materials and carbon nanotube composites.

The transient thermal response of these materials was simulated with the BUCKY 1-D radiation hydrodynamics code utilizing the standardized HAPL x-ray and ion threat spectra. Evacuated and buffer gas filled bare-walled configurations were simulated.

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