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

M. Yajima; N. Ohno; S. Kajita; G. De Temmerman; K. Bystrov; S. Bardin; T.W. Morgan; S. Masuzaki

doi:10.1016/j.fusengdes.2016.07.026

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

M. Yajima, N. Ohno, S. Kajita, G. De Temmerman, K. Bystrov, S. Bardin, T.W. Morgan, S. Masuzaki

Science and Technology of Nuclear Fusion

Research output: Contribution to journal › Article › Academic › peer-review

21 Citations (Scopus)

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.

Original language	English
Pages (from-to)	156-161
Number of pages	6
Journal	Fusion Engineering and Design
Volume	112
DOIs	https://doi.org/10.1016/j.fusengdes.2016.07.026
Publication status	Published - 15 Nov 2016

Keywords

Arcing
ELM
Fiber-formed nanostructure
Linear plasma device
Transient heat load
Tungsten

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10.1016/j.fusengdes.2016.07.026

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

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.",

keywords = "Arcing, ELM, Fiber-formed nanostructure, Linear plasma device, Transient heat load, Tungsten",

author = "M. Yajima and N. Ohno and S. Kajita and {De Temmerman}, G. and K. Bystrov and S. Bardin and T.W. Morgan and S. Masuzaki",

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doi = "10.1016/j.fusengdes.2016.07.026",

language = "English",

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T1 - Investigation of arcing on fiber-formed nanostructured tungsten by pulsed plasma during steady state plasma irradiation

AU - Yajima, M.

AU - Ohno, N.

AU - Kajita, S.

AU - De Temmerman, G.

AU - Bystrov, K.

AU - Bardin, S.

AU - Morgan, T.W.

AU - Masuzaki, S.

PY - 2016/11/15

Y1 - 2016/11/15

N2 - 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.

AB - 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.

KW - Arcing

KW - ELM

KW - Fiber-formed nanostructure

KW - Linear plasma device

KW - Transient heat load

KW - Tungsten

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DO - 10.1016/j.fusengdes.2016.07.026

M3 - Article

AN - SCOPUS:84982262079

SN - 0920-3796

VL - 112

SP - 156

EP - 161

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

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

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Keywords

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