Russ Doerner - Controlled Fusion Atomic Data Center

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US-EU Collaboration on Be/C/W has produced significant new results, but more work is needed. • Understand mechanism responsible for Be-rich layer formation at very low impurity Be concentration (~0.1%) • Develop a model that can predict the dynamic behavior of the Be coating process • Investigate concurrent Be and C injection into D plasma • Investigate similarities and differences of W & C targets • W-Be alloy formation is a critical issue needing immediate attention (melting temperature, thermal properties, formation rates, tritium retention, etc.) UCSD University of California San Diego R. <strong>Doerner</strong>, March 22, 2005 PSIF workshop, ORNL
Be impurities may dominate PMI (specifically tritium accumulation) in devices with large area Be walls • Need to predict first wall erosion rates (CX, diffusion, blob transport, ELMs, …) • Understanding SOL flows in confinement devices is crucial to predicting divertor impurity content and likelihood of layer growth • Subject layers to ELM style heat pulses during formation • Investigate role of other impurities (i.e. oxygen, Ne, Ar) UCSD University of California San Diego R. <strong>Doerner</strong>, March 22, 2005 PSIF workshop, ORNL
Page 1 and 2: Erosion Behavior of Carbon and Tung
Page 3 and 4: PISCES-B, and Its Associated Surfac
Page 5 and 6: PISCES-B linear plasma device simul
Page 7 and 8: PISCES-B operation above 6 eV T e p
Page 9 and 10: A small beryllium impurity concentr
Page 11 and 12: Be layer formation effectively elim
Page 13 and 14: Do we understand why these Be layer
Page 15 and 16: WPM samples show collection of bery
Page 17 and 18: Be impurities from the ITER first w
Page 19 and 20: What will be the result of Be layer
Page 21: The dynamic behavior of the Be laye

Russ Doerner - Controlled Fusion Atomic Data Center

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