Erosion and redeposition of graphite by hydrogen plasmas
The results of erosion and redeposition studies of graphite by hydrogen plasma bombardment in the PISCES facility are reviewed. The total erosion yields of several types of graphites have been measured during plasma exposure with ion fluxes of up to 2 x 10/sup 18/ cm/sup -2/ . S/sup -1/, ion energies of 50 to 200 eV, and sample temperatures of 50 to 950/sup 0/C. Hydrogen and deuterium plasmas have been used to bombard Poco, ATJ, and pyrolytic graphites, and a four-directional carbon-carbon (C-C) composite weave. The erosion rates of all the graphites tested are about equal, suggesting that surface damage by the ion bombardment results in similar erosion yields. The C-C composite weave material showed an increased weight loss during initial exposure, and then equal or lower erosion yields compared to the other graphites.
- Research Organization:
- 9523812; 4027500
- OSTI ID:
- 6025080
- Journal Information:
- Fusion Technol.; (United States), Journal Name: Fusion Technol.; (United States) Vol. 15:1; ISSN FUSTE
- Country of Publication:
- United States
- Language:
- English
Similar Records
In situ spectroscopic measurements of erosion behavior of TFTR-redeposited carbon materials under high-flux plasma bombardment in PISCES-A
In situ spectroscopic measurements of erosion behavior of Tokamak Fusion Test Reactor redeposited carbon materials under high-flux plasma bombardment in Plasma Interactive Surface Component Experimental Station-A
Related Subjects
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
CARBON
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
DEPOSITION
DEUTERIUM
ELEMENTAL MINERALS
ELEMENTS
EROSION
FLUX DENSITY
GRAPHITE
HYDROGEN
HYDROGEN ISOTOPES
INTERACTIONS
IONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MINERALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PLASMA
REACTION KINETICS
SPUTTERING
STABLE ISOTOPES
TEST FACILITIES