Investigation of arcing on fiber-formed nanostructured tungsten by pulsed plasma during steady state plasma irradiation

TitleInvestigation of arcing on fiber-formed nanostructured tungsten by pulsed plasma during steady state plasma irradiation
Publication TypeJournal Article
Year of Publication2016
AuthorsM. Yajima, N. Ohno, S. Kajita, G. De Temmerman, K. Bystrov, S. Bardin, T.W Morgan, S. Masuzaki
JournalFusion Engineering and Design
Volume112
Pagination156-161
Abstract

Arcing on fiber-formed nanostructured tungsten samples during ELM-like pulses was investigated using the superimposition of high power pulsed plasma on a steady state plasma with hydrogen gas in the linear plasma device Pilot-PSI. The ignition of arcing was observed when the floating potential of the samples was less than −75 V with sufficient heat flux. The surface observation showed that the arc spots were not in the center, but in the peripheral area of the plasma column. Considering the plasma potential profile in the Pilot-PSI, the arcing occurred at the position where the heat flux and the sheath potential drop are sufficiently large.

DOI10.1016/j.fusengdes.2016.07.026
Division

PSI

Department

PSI-E

PID

901a6525a59df7b56512b5471d688c81

Alternate TitleFusion Eng. Des.

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