RECENT PROGRESS IN TRITIUM CODEPOSITION MODELING

摘要: Tritium codeposition in sputtered and redeposited surface layers may be a critical issue for next generation tokamak fusion reactors. We review recent codeposition/erosion code/model improvements, calculations. Updated models carbon include chemical sputtering yields, hydrocarbon species, atomic molecular processes. Calculations show that coated divertor with semi or fullydetached plasma behave poorly, predicted rates of order 10 gT/1000s pulse, peak net erosion nm/s. Other materials such as beryllium, tungsten, lithium, non-detached regime, look better. Outstanding research issues reflection/sticking properties carbon/hydrocarbon particles, possible flux dependence sputtering, dopant effects.