Feasibility of arc-discharge and plasma-sputtering methods in cleaning plasma-facing and diagnostics components of fusion reactors

Antti Hakola (Corresponding Author), Jari Likonen, Juuso Karhunen, Juuso T. Korhonen, Märt Aints, Matti Laan, Peeter Paris, Jukka Kolehmainen, Mika Koskinen, Sanna Tervakangas

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

We have studied the feasibility of arc-discharge and plasma-sputtering methods in removing deposited layers from ITER-relevant test samples. Prototype devices have been designed and constructed for the experiments and the cleaning process is monitored by a spectral detection system. The present version of the arc-discharge device is capable of removing 1-µm thick layers from 350-mm2 areas in 4-8 s, but due to the increased roughness of the cleaned surfaces and signs of local melting, mirror-like surfaces cannot be treated by this technique. The plasma-sputtering approach, for its part, is some 5-10 times slower in removing the deposited layers but no changes in surface roughness or morphology of the samples could be observed after the cleaning phase. The arc-discharge technique could therefore be used for rapid cleaning of plasma-facing components during maintenance shutdowns of ITER while in the case of diagnostics mirrors plasma sputtering is preferred.
Original languageEnglish
Pages (from-to)101-106
JournalFusion Engineering and Design
Volume96-97
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed
Event28th Symposium on Fusion Technology, SOFT 2014 - San Sebastián, Spain
Duration: 29 Sep 20143 Oct 2014
Conference number: 28

Fingerprint

Plasma diagnostics
Facings
Fusion reactors
Sputtering
Cleaning
Plasmas
Surface roughness
Surface morphology
Mirrors
Melting
Experiments

Keywords

  • arc discharge
  • cleaning rate
  • diagnostics mirror
  • ITER
  • plasma sputtering
  • plasma-facing component

Cite this

Hakola, Antti ; Likonen, Jari ; Karhunen, Juuso ; Korhonen, Juuso T. ; Aints, Märt ; Laan, Matti ; Paris, Peeter ; Kolehmainen, Jukka ; Koskinen, Mika ; Tervakangas, Sanna. / Feasibility of arc-discharge and plasma-sputtering methods in cleaning plasma-facing and diagnostics components of fusion reactors. In: Fusion Engineering and Design. 2015 ; Vol. 96-97. pp. 101-106.
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Feasibility of arc-discharge and plasma-sputtering methods in cleaning plasma-facing and diagnostics components of fusion reactors. / Hakola, Antti (Corresponding Author); Likonen, Jari; Karhunen, Juuso; Korhonen, Juuso T.; Aints, Märt; Laan, Matti; Paris, Peeter; Kolehmainen, Jukka; Koskinen, Mika; Tervakangas, Sanna.

In: Fusion Engineering and Design, Vol. 96-97, 2015, p. 101-106.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Hakola, Antti

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AU - Korhonen, Juuso T.

AU - Aints, Märt

AU - Laan, Matti

AU - Paris, Peeter

AU - Kolehmainen, Jukka

AU - Koskinen, Mika

AU - Tervakangas, Sanna

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