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000910629 1001_ $$0P:(DE-HGF)0$$aTsitrone, E.$$b0
000910629 245__ $$aInvestigation of plasma wall interactions between tungsten plasma facing components and helium plasmas in the WEST tokamak
000910629 260__ $$aVienna$$bIAEA$$c2022
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000910629 520__ $$aITER will operate with a tungsten divertor, a material featuring surface morphology changes when exposed to helium plasmas, in particular the formation of the so called tungsten fuzz under specific conditions. Investigating interactions between tungsten plasma facing components and helium plasmas in a tokamak environment is therefore a key point to consolidate predictions for the ITER divertor performance and lifetime. To this end, a dedicated helium campaign was performed in the full tungsten WEST tokamak, cumulating ∼2000 s of repetitive L mode discharges. It is shown that conditions for tungsten fuzz formation, as derived from linear devices experiments (incident helium energy Einc > 20 eV, helium fluence >1024 He/m2, surface temperature Tsurf > 700 °C), were met in the outer strike point (OSP) area of the inertially cooled tungsten divertor elements of WEST. Preliminary inspection of the components after the campaign did not show visible signs of surface modification, but points to significant net erosion in the OSP area. An extensive post mortem analysis is now ongoing to confirm these first indications. These results underline that the complex balance between erosion/redeposition (in particular linked to impurities) and tungsten fuzz formation needs to be taken into account in tokamak conditions.
000910629 536__ $$0G:(DE-HGF)POF4-134$$a134 - Plasma-Wand-Wechselwirkung (POF4-134)$$cPOF4-134$$fPOF IV$$x0
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000910629 7001_ $$0P:(DE-HGF)0$$aPegourie, B.$$b1
000910629 7001_ $$0P:(DE-HGF)0$$aGunn, J. P.$$b2
000910629 7001_ $$00000-0002-9291-7654$$aBernard, E.$$b3
000910629 7001_ $$0P:(DE-HGF)0$$aBruno, V.$$b4
000910629 7001_ $$00000-0002-6566-6116$$aCorre, Y.$$b5
000910629 7001_ $$0P:(DE-HGF)0$$aDelpech, L.$$b6
000910629 7001_ $$00000-0002-8334-3521$$aDiez, M.$$b7
000910629 7001_ $$0P:(DE-HGF)0$$aDouai, D.$$b8
000910629 7001_ $$0P:(DE-HGF)0$$aEkedahl, A.$$b9
000910629 7001_ $$0P:(DE-HGF)0$$aFedorczak, N.$$b10
000910629 7001_ $$00000-0002-7472-7830$$aGallo, A.$$b11
000910629 7001_ $$0P:(DE-HGF)0$$aLoarer, T.$$b12
000910629 7001_ $$0P:(DE-HGF)0$$aVartanian, S.$$b13
000910629 7001_ $$00000-0003-0104-1616$$aGaspar, J.$$b14
000910629 7001_ $$0P:(DE-HGF)0$$aLe Bohec, M.$$b15
000910629 7001_ $$0P:(DE-HGF)0$$aRigollet, F.$$b16
000910629 7001_ $$00000-0002-8819-1563$$aBisson, R.$$b17
000910629 7001_ $$0P:(DE-Juel1)129976$$aBrezinsek, S.$$b18$$eCorresponding author
000910629 7001_ $$0P:(DE-Juel1)158050$$aDittmar, T.$$b19
000910629 7001_ $$00000-0002-4173-0961$$aDe Temmerman, G.$$b20
000910629 7001_ $$00000-0003-1385-1296$$aHakola, A.$$b21
000910629 7001_ $$0P:(DE-Juel1)145890$$aWauters, T.$$b22
000910629 7001_ $$00000-0002-8755-9370$$aBalden, M.$$b23
000910629 7001_ $$00000-0002-5337-6963$$aMayer, M.$$b24
000910629 7001_ $$0P:(DE-HGF)0$$aWEST Team$$b25
000910629 773__ $$0PERI:(DE-600)2037980-8$$a10.1088/1741-4326/ac2ef3$$gVol. 62, no. 7, p. 076028 -$$n7$$p076028 -$$tNuclear fusion$$v62$$x0029-5515$$y2022
000910629 8564_ $$uhttps://juser.fz-juelich.de/record/910629/files/Tsitrone_2022_Nucl._Fusion_62_076028.pdf$$yRestricted
000910629 8564_ $$uhttps://juser.fz-juelich.de/record/910629/files/Postprint_Sebastijan_INVESTIGATION%20OF%20PLASMA%20WALL.pdf$$yPublished on 2022-05-06. Available in OpenAccess from 2023-05-06.
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