VAPOR SHIELD PROTECTION OF PLASMA FACING COMPONENTS UNDER INCIDENT HIGH HEAT-FLUX

被引：11

作者：

GILLIGAN, J

BOURHAM, M

HANKINS, O

EDDY, W

HURLEY, J

BLACK, D

机构：

[1] Department of Nuclear Engineering, North Carolina State University, Raleigh

来源：

JOURNAL OF NUCLEAR MATERIALS | 1992年 / 196卷

关键词：

D O I：

10.1016/S0022-3115(06)80106-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Disruption damage to plasma facing components has been found to be a limiting design constraint in ITER and other large fusion devices. A growing data base is confirming the role of the vapor shield in protecting ablated surfaces under disruption-like conditions, which would imply longer lifetimes for plasma facing components. We present new results for exposure of various material surfaces to high heat fluxes up to 70 GW/m2 over 100 mus (7 MJ/m2) in the SIRENS high heat flux test facility. Tested materials are graphite grades, pyrolytic graphite, refractory metals and alloys, refractory coatings on copper substrates, boron nitride and preliminary results of diamond coating on silicon substrates. An empirical scaling law of the energy transmission factor through the vapor shield has been obtained. The application of a strong external magnetic field, to reduce turbulent energy transport in the vapor shield boundary, is shown to decrease f by as much as 35% for fields of 8 T.

引用

页码：596 / 601

页数：6

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