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Modelling of deposi...
Modelling of deposition and erosion of injected WF6 and MoF6 in TEXTOR
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Kirschner, Andreas (författare)
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Kreter, Arkadi (författare)
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Wienhold, Peter (författare)
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visa fler...
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- Weckmann, Armin (författare)
- KTH,Fusionsplasmafysik
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Pospieszczyk, Albrecht (författare)
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Ding, R (författare)
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Borodin, Dmitriy (författare)
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Brezinsek, Sebastijan (författare)
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Sergienko, Gennady (författare)
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- Rubel, Marek (författare)
- KTH,Fusionsplasmafysik
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Linsmeier, Christian (författare)
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(creator_code:org_t)
- Elsevier, 2016
- 2016
- Engelska.
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Ingår i: Nuclear Materials and Energy. - : Elsevier. - 2352-1791.
- Relaterad länk:
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https://kth.diva-por... (primary) (Raw object)
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Tracer injection experiments in TEXTOR with MoF 6 and WF 6 lead to local deposition of about 6% for Mo and about 1% for W relative to the injected amount of Mo and W atoms. Modelling of these experiments has been done with ERO applying updated data for physical sputtering. The dissociation of the injected molecules has been treated in a simplified manner due to the lack of dissociation rate coefficients. How- ever, with this it was possible to reproduce the observed radial penetration of Mo and W atoms into the plasma. The modelled local deposition efficiencies are about 50% for Mo and 60% for W assuming typical plasma parameters for the experimental conditions used. To reproduce the measured deposition efficien- cies an enhancement factor for the erosion of deposited Mo and W has to be assumed ( ∼10 for Mo and ∼25 for W). Due to the rather low electron temperature T e of these plasma conditions (T e ∼15 eV at the location of injection), Mo and W are mostly sputtered by impurities whereas sputtering due to deuterium is negligible. A parameter study applying larger electron temperature leads to increased sputtering and thus to reduced local deposition efficiencies of about 30% for Mo and 5% for W. Though, even under these conditions enhanced erosion, albeit with reduced enhancement factors, is needed in the modelling to obtain the small measured deposition efficiencies.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Kirschner, Andre ...
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Kreter, Arkadi
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Wienhold, Peter
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Weckmann, Armin
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Pospieszczyk, Al ...
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Ding, R
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visa fler...
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Borodin, Dmitriy
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Brezinsek, Sebas ...
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Sergienko, Genna ...
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Rubel, Marek
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Linsmeier, Chris ...
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visa färre...
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