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- W2912657730 abstract "The First Mirror Test for ITER has been carried out in JET with mirrors exposed during: (i) the third ILW campaign (ILW-3, 2015–2016, 23.33 h plasma) and (ii) all three campaigns, i.e. ILW-1 to ILW-3: 2011–2016, 63,52 h in total. All mirrors from main chamber wall show no significant changes of the total reflectivity from the initial value and the diffuse reflectivity does not exceed 3% in the spectral range above 500 nm. The modified layer on surface has very small amount of impurities such as D, Be, C, N, O and Ni. All mirrors from the divertor (inner, outer, base under the bulk W tile) lost reflectivity by 20–80% due to the beryllium-rich deposition also containing D, C, N, O, Ni and W. In the inner divertor N reaches 5 × 1017 cm−2, W is up to 4.3 × 1017 cm−2, while the content of Ni is the greatest in the outer divertor: 3.8 × 1017 cm−2. Oxygen-18 used as the tracer in experiments at the end of ILW-3 has been detected at the level of 1.1 × 1016 cm−2. The thickness of deposited layer is in the range of 90 nm to 900 nm. The layer growth rate in the base (2.7 pm s − 1) and inner divertor is proportional to the exposure time when a single campaign and all three are compared. In a few cases, on mirrors located at the cassette mouth, flaking of deposits and erosion occurred." @default.
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- W2912657730 date "2019-05-01" @default.
- W2912657730 modified "2023-10-11" @default.
- W2912657730 title "First mirror test in JET for ITER: Complete overview after three ILW campaigns" @default.
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- W2912657730 doi "https://doi.org/10.1016/j.nme.2019.02.009" @default.
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