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000841763 1001_ $$0P:(DE-Juel1)2620$$aKirschner, A.$$b0$$eCorresponding author$$ufzj
000841763 245__ $$aModelling of deposition and erosion of injected WF 6 and MoF 6 in TEXTOR
000841763 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2017
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000841763 520__ $$aTracer injection experiments in TEXTOR with MoF6 and WF6 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. However, 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 efficiencies 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 Te of these plasma conditions (Te∼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.
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000841763 7001_ $$0P:(DE-Juel1)130070$$aKreter, A.$$b1$$ufzj
000841763 7001_ $$0P:(DE-Juel1)130193$$aWienhold, P.$$b2$$ufzj
000841763 7001_ $$0P:(DE-HGF)0$$aWeckmann, A.$$b3
000841763 7001_ $$0P:(DE-Juel1)130122$$aPospieszczyk, A.$$b4$$ufzj
000841763 7001_ $$0P:(DE-HGF)0$$aDing, R.$$b5
000841763 7001_ $$0P:(DE-Juel1)7884$$aBorodin, D.$$b6$$ufzj
000841763 7001_ $$0P:(DE-Juel1)129976$$aBrezinsek, S.$$b7$$ufzj
000841763 7001_ $$0P:(DE-Juel1)130158$$aSergienko, G.$$b8$$ufzj
000841763 7001_ $$0P:(DE-HGF)0$$aRubel, M.$$b9
000841763 7001_ $$0P:(DE-Juel1)157640$$aLinsmeier, Ch.$$b10$$ufzj
000841763 773__ $$0PERI:(DE-600)2808888-8$$a10.1016/j.nme.2016.10.022$$gVol. 12, p. 564 - 568$$p564 - 568$$tNuclear materials and energy$$v12$$x2352-1791$$y2017
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