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Metal impurity fluxes and plasma-surface interactions in EXTRAP T2R
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.ORCID-id: 0000-0001-7389-5501
KTH, Skolan för elektro- och systemteknik (EES), Fusionsplasmafysik.ORCID-id: 0000-0002-5259-0458
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2008 (Engelska)Ingår i: PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY, 2008, Vol. 100Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The EXTRAP T2R is a large aspect ratio Reversed Field Pinch device. The main focus of interest for the experiments is the active feedback control of resistive wall modes [1]. With feedback it has been possible to prolong plasma discharges in T2R from about 20 ms to nearly 100 ms. In a series of experiments in T2R, in H- and D- plasmas with and without feedback, quantitative spectroscopy and passive collector probes have been used to study the flux of metal impurities. Time resolved spectroscopic measurements of Cr and Mo lines showed large metal release towards discharge termination without feedback. Discharge integrated fluxes of Cr, Fe, Ni and Mo were also measured with collector probes at wall position. Reasonable quantitative agreement was found between the spectroscopic and collector probe measurements. The roles of sputtering, thermal evaporation and arcing in impurity production are evaluated based on the composition of the measured impurity flux.

Ort, förlag, år, upplaga, sidor
2008. Vol. 100
Serie
Journal of Physics, ISSN 1742-6588
Nationell ämneskategori
Fusion, plasma och rymdfysik
Identifikatorer
URN: urn:nbn:se:kth:diva-25569DOI: 10.1088/1742-6596/100/6/062030ISI: 000275655200226Scopus ID: 2-s2.0-77954318021OAI: oai:DiVA.org:kth-25569DiVA, id: diva2:371005
Konferens
17th International Vacuum Congress/13th International Conference on Surface Science/Internatinal Conference on Nanoscience and Technology Stockholm, SWEDEN, JUL 02-06, 2007
Anmärkning
QC 20101118Tillgänglig från: 2010-11-18 Skapad: 2010-10-27 Senast uppdaterad: 2011-03-04Bibliografiskt granskad

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Rachlew, ElisabethBrunsell, PerFrassinetti, Lorenzo

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Bergsåker, HenricMenmuir, SheenaRachlew, ElisabethBrunsell, PerFrassinetti, LorenzoDrake, James R.
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Fusionsplasmafysik
Fusion, plasma och rymdfysik

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