Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Analysis of the outer divertor hot spot activity in the protection video camera recordings at JET
Max Planck Inst Plasma Phys, D-85748 Garching, Germany.;Jozef Stefan Inst, Jamoya Ul 39, SI-1000 Ljubljana, Slovenia.;Max Planck Inst Plasma Phys, D-85748 Garching, Germany.;SFA, Jozef Stefan Inst, Jamova 39, SI-1000 Ljubljana, Slovenia..
KTH, School of Electrical Engineering and Computer Science (EECS), Fusion Plasma Physics.
KTH, School of Electrical Engineering and Computer Science (EECS), Fusion Plasma Physics.
KTH, School of Electrical Engineering and Computer Science (EECS), Fusion Plasma Physics.ORCID iD: 0000-0002-9546-4494
Show others and affiliations
Number of Authors: 12302019 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 139, p. 115-123Article in journal (Refereed) Published
Abstract [en]

Hot spots on the divertor tiles at JET result in overestimation of the tile surface temperature which causes unnecessary termination of pulses. However, the appearance of hot spots can also indicate the condition of the divertor tile surfaces. To analyse the behaviour of the hot spots in the outer divertor tiles of JET, a simple image processing algorithm is developed. The algorithm isolates areas of bright pixels in the camera image and compares them to previously identified hot spots. The activity of the hot spots is then linked to values of other signals and parameters in the same time intervals. The operation of the detection algorithm was studied in a limited pulse range with high hot spot activity on the divertor tiles 5, 6 and 7. This allowed us to optimise the values of the controlling parameters. Then, the wider applicability of the method has been demonstrated by the analysis of the hot spot behaviour in a whole experimental campaign.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 139, p. 115-123
Keywords [en]
JET, ITER-like wall, Plasma-wall interaction, Image analysis
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-245939DOI: 10.1016/j.fusengdes.2018.12.079ISI: 000458939100016Scopus ID: 2-s2.0-85059687937OAI: oai:DiVA.org:kth-245939DiVA, id: diva2:1296767
Note

QC 20190318

Available from: 2019-03-18 Created: 2019-03-18 Last updated: 2019-03-18Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Bykov, IgorFrassinetti, LorenzoGarcia Carrasco, AlvaroHellsten, TorbjörnMenmuir, SheenaPetersson, PerRachlew, ElisabethRatynskaia, Svetlana V.Rubel, MarekStröm, PetterTolias, PanagiotisWeckmann, Armin

Search in DiVA

By author/editor
Bergsåker, HenrikBykov, IgorFrassinetti, LorenzoGarcia Carrasco, AlvaroHellsten, TorbjörnJohnson, ThomasMenmuir, SheenaPetersson, PerRachlew, ElisabethRatynskaia, Svetlana V.Rubel, MarekStefanikova, EsteraStröm, PetterTholerus, EmmiTolias, PanagiotisVallejos Olivares, PabloWeckmann, ArminZhou, Y.
By organisation
Fusion Plasma PhysicsPhysicsSpace and Plasma Physics
In the same journal
Fusion engineering and design
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 37 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf