Erosion of PFC materials induced by poroelectron emission

Autor:	N.V. Tatarinova, V.A. Kurnaev
Rok vydání:	1995
Předmět:	Nuclear and High Energy Physics Debye sheath Tokamak Chemistry Ultra-high vacuum Analytical chemistry law.invention symbols.namesake Nuclear Energy and Engineering law Sputtering Electric field Electrode Erosion symbols General Materials Science Atomic physics Porosity
Zdroj:	Journal of Nuclear Materials. :939-942
ISSN:	0022-3115
DOI:	10.1016/0022-3115(94)00615-6
Popis:	The main features of the poroelectron emission (PEE) in high vacuum conditions are briefly described. It is shown that current densities from negative gas saturated electrode can reach A/m 2 at constant electric field strength 10 5 -10 6 V/m. The measured erosion rate of porous graphite electrode at 10 6 V/m equals 10 −7 kg s −1 m −2 . The comparison with evaluated electric field strength at plasma sheath in tokamaks permits to suppose that in some cases PEE induced erosion can be comparable with physical sputtering and large negative currents can influence plasma sheath parameters
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::699bba2fe5acc5af8cef0c0b38243240 https://doi.org/10.1016/0022-3115(94)00615-6 Zobrazit plný text záznamu Full Text from ScienceDirect