Self-shielding of a plasma-exposed surface during extreme transient heatloads

J.J. Zielinski, H.J. Meiden, van der, T.W. Morgan, M.H.J. 't Hoen, D.C. Schram, G.C. De Temmerman

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)
129 Downloads (Pure)

Abstract

The power deposition on a tungsten surface exposed to combined pulsed/continuous high power plasma is studied. A study of the correlation between the plasma parameters and the power deposition on the surface demonstrates the effect of particle recycling in the strongly coupled regime. Upon increasing the input power to the plasma source, the energy density to the target first increases then decreases. We suggest that the sudden outgassing of hydrogen particles from the target and their subsequent ionization causes this. This back-flow of neutrals impedes the power transfer to the target, providing a shielding of the metal surface from the intense plasma flux.
Original languageEnglish
Article number124102
Number of pages5
JournalApplied Physics Letters
Volume104
DOIs
Publication statusPublished - 2014

Fingerprint Dive into the research topics of 'Self-shielding of a plasma-exposed surface during extreme transient heatloads'. Together they form a unique fingerprint.

Cite this