Chemical erosion of carbon at ITER relevant plasma fluxes: results from the linear plasma generator Pilot-PSI

G.J. van Rooij, J. Westerhout, S. Brezinsek, J. Rapp

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

The chemical erosion of carbon was investigated in the linear plasma device Pilot-PSI for ITER divertor relevant hydrogen plasma flux densities 10 23 < Γ < 1025 m-2 s-1. The erosion was analyzed in situ by optical emission spectroscopy and post mortem by surface profilometry. The experiments indicate a threshold for the absolute carbon erosion rate as a function of plasma temperature Te around 0.7 eV, a peak of the surface temperature around 550 °C, and no dependence on plasma flux density. The latter implies a flux dependence of the chemical erosion yield as Γ-1. The value of the chemical erosion yield at the surface temperature of maximum erosion and Γ = 1 × 1024 m-2 s-1 was 0.9% for Te < 0.5 eV as determined by surface profilometry.

Original languageEnglish
Pages (from-to)S137-S140
JournalJournal of Nuclear Materials
Volume415
Issue numbersuppl 1
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

Fingerprint Dive into the research topics of 'Chemical erosion of carbon at ITER relevant plasma fluxes: results from the linear plasma generator Pilot-PSI'. Together they form a unique fingerprint.

Cite this