The deposition/erosion on optical diagnostic components—mirrors—is a critical issue in reactor class devices with long-pulsed high fluence plasma operation. The paper presents results of the three-dimensional Monte–Carlo code ERO2.0 for two diagnostic aperture and first mirror geometries to be deployed in ITER, along with a separate simulation study that aims to replicate results from an experimental first-mirror study carried out on JET. Promisingly, very little plasma and impurity deposition on mirrors for the anticipated plasma durations is found in the ERO2.0 modelling taking into account the current ITER Research Plan and a material mix with beryllium first wall and a tungsten divertor. The post-mortem analysis of mirrors exposed during the experiment and the initial benchmarking efforts on the JET mirror experiment are also broadly consistent, increasing the confidence in predictions for ITER.
この論文は、ITERの光学診断コンポーネントであるミラーの堆積/侵食について、3次元モンテカルロコードERO2.0を用いて検討した研究です。JETでの実験結果と整合的な予測が得られ、ITERでは長時間の運転でも、ベリリウムの第一壁とタングステンのダイバータを考慮した場合、ミラーへの堆積は少ないことが示されています。