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Tungsten Contamination by Neutral Beam Shine-through in the JET ILW

J. D. Strachan, G. F. Matthews,P. Belo,I. Coffey,G. Corrigan, B. Davis, W., Fundamenski,D. Harting, I. Jenkins,L. Lauro-Taroni, G. McCracken, V. Thompson, JET EFDA Contributors

semanticscholar(2011)

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Abstract
The JET ILW experiment will have W divertor and Be main chamber walls. However, the W coated neutral beam shine-through protection tiles are in the main chamber. Therefore, shine-through of the 120 kV injected neutral beams will cause some W sputtering, which can contaminate the JET plasma. EDGE2D based calculations are presented which indic ate that 0.1 MW of W radiation might occur in the absence of impurity pinches.
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