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Abstract

Total erosion yields of graphite and carbon materials under hydrogen and deuterium bombardment measured with the weight-loss method are presented for ion energies between 15 eV and 8 keV in the temperature range 300 to above 1000 K. The temperature of the maximum of the chemical erosion increases from below 600 to above 850 K with ion energies from 15 to 300 eV. Chemical erosion yields obtained by weight-loss measurements exceed yields measured mass-spectrometrically always by a factor of about 2. Collector experiments show that a fraction of the eroded particle sticks to walls and, therefore, reduces the yield measured by mass spectrometry. A synergistic effect of neutrals in the ion beam on the chemical erosion yield can be excluded.

Additional information

Authors: BALDEN M, Max-Planck-Institut f³r Plasmaphysik, EURATOM-Association, Garching bei M³nchen (DE);ROTH J, Max-Planck-Institut f³r Plasmaphysik, EURATOM-Association, Garching bei M³nchen (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials 280 (2000) pp. 39-44
Availability: Journal of Nuclear Materials
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