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- Title
Cold emission of negative ions from porous graphite.
- Authors
Sinel'nikov, D.; Ivanov, D.; Kurnaev, V.; Mamedov, N.
- Abstract
The electric field strength in the near-wall layers of thermonuclear facilities can be sufficient for the emission of negative ions from the surface of plasma facing materials. The mass spectra of negative ions from MPG-8 porous graphite at electric field strengths up to 4 × 10 V/m and the surface composition of the target have been studied by ion scattering spectroscopy. The dependence of the mass composition of negative ion emission and residual gas on the sample's temperature has been measured and a correlation between the intensity of negative hydrogen-ion emission and the desorption of water has been established. The temperature dependence of the emission of negative ions and clusters of carbon and hydrocarbon is in qualitative agreement with the chemical erosion of graphite.
- Publication
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques, 2012, Vol 6, Issue 4, p673
- ISSN
1027-4510
- Publication type
Article
- DOI
10.1134/S1027451012080150