Ion sputtering, evaporation and arcing in DIVA
- 1 June 1978
- journal article
- letter
- Published by IOP Publishing in Nuclear Fusion
- Vol. 18 (6), 872-875
- https://doi.org/10.1088/0029-5515/18/6/015
Abstract
Experimental studies on the origin of metal impurities in DIVA are described. Three processes of metal impurity release, i.e. ion sputtering, evaporation and arcing, have been identified. Among these processes, ion sputtering is the dominant process in the quiet phase of the discharge, which is characterized by the lack of spikes in the loop voltage as well as by the fact that no heat flux concentration towards a specific part of the first wall takes place. Moreover, it is demonstrated that a honeycomb structure can decrease the metal impurity release.Keywords
This publication has 10 references indexed in Scilit:
- Possibility of heavy-impurity control by light-impurity radiation in a large tokamakNuclear Fusion, 1977
- Density distributions of impurities and related energy losses in tokamak plasmasNuclear Fusion, 1977
- Radiation losses from oxygen and iron impurities in a high-temperature plasmaNuclear Fusion, 1976
- Aluminium limiter experiment in ST tokamakNuclear Fusion, 1976
- Control of re-cycling and impurities in the ATC tokamak by means of gettered surfacesNuclear Fusion, 1975
- Proton Sputtering of GoldJournal of Applied Physics, 1970
- Sputtering Yield Measurements with Low-Energy Metal Ion BeamsJournal of Applied Physics, 1969
- Sputtering of Metals by Hydrogen IonsJournal of Applied Physics, 1964
- Sputtering experiments in the high energy regionNuclear Instruments and Methods, 1961
- Importance of insulating inclusions in arc initiationBritish Journal of Applied Physics, 1960