Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B

M Wisse (Corresponding Author), L Marot, A Widdowson, M Rubel, D Ivanova, P Petersson, R P Doerner, M J Baldwin, Jari Likonen, E Alves, Antti Hakola, Seppo Koivuranta, R Steiner, E Meyer

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well
Original languageEnglish
Pages (from-to)122-130
Number of pages8
JournalFusion Engineering and Design
Volume89
Issue number2
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Beryllium
Cleaning
Mirrors
Lasers
Vacuum
Carbon
Tritium
Pulsed lasers
Deposits
Plasmas

Keywords

  • Beryllium
  • first mirrors
  • ITER
  • laser cleaning

Cite this

Wisse, M., Marot, L., Widdowson, A., Rubel, M., Ivanova, D., Petersson, P., ... Meyer, E. (2014). Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. Fusion Engineering and Design, 89(2), 122-130. https://doi.org/10.1016/j.fusengdes.2014.01.042
Wisse, M ; Marot, L ; Widdowson, A ; Rubel, M ; Ivanova, D ; Petersson, P ; Doerner, R P ; Baldwin, M J ; Likonen, Jari ; Alves, E ; Hakola, Antti ; Koivuranta, Seppo ; Steiner, R ; Meyer, E. / Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. In: Fusion Engineering and Design. 2014 ; Vol. 89, No. 2. pp. 122-130.
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abstract = "A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well",
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author = "M Wisse and L Marot and A Widdowson and M Rubel and D Ivanova and P Petersson and Doerner, {R P} and Baldwin, {M J} and Jari Likonen and E Alves and Antti Hakola and Seppo Koivuranta and R Steiner and E Meyer",
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Wisse, M, Marot, L, Widdowson, A, Rubel, M, Ivanova, D, Petersson, P, Doerner, RP, Baldwin, MJ, Likonen, J, Alves, E, Hakola, A, Koivuranta, S, Steiner, R & Meyer, E 2014, 'Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B', Fusion Engineering and Design, vol. 89, no. 2, pp. 122-130. https://doi.org/10.1016/j.fusengdes.2014.01.042

Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. / Wisse, M (Corresponding Author); Marot, L; Widdowson, A; Rubel, M; Ivanova, D; Petersson, P; Doerner, R P; Baldwin, M J; Likonen, Jari; Alves, E; Hakola, Antti; Koivuranta, Seppo; Steiner, R; Meyer, E.

In: Fusion Engineering and Design, Vol. 89, No. 2, 2014, p. 122-130.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B

AU - Wisse, M

AU - Marot, L

AU - Widdowson, A

AU - Rubel, M

AU - Ivanova, D

AU - Petersson, P

AU - Doerner, R P

AU - Baldwin, M J

AU - Likonen, Jari

AU - Alves, E

AU - Hakola, Antti

AU - Koivuranta, Seppo

AU - Steiner, R

AU - Meyer, E

PY - 2014

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AB - A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well

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KW - first mirrors

KW - ITER

KW - laser cleaning

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