Abstract
The identification of the sources of atomic tungsten and the measurement of their radiation distribution in front of all plasma-facing components has been performed in JET with the help of two digital cameras with the same two-dimensional view, equipped with interference filters of different bandwidths centred on the W I (400.88 nm) emission line. A new algorithm for the subtraction of the continuum radiation was successfully developed and is now used to evaluate the W erosion even in the inner divertor region where the strong recombination emission is dominating over the tungsten emission. Analysis of W sputtering and W redistribution in the divertor by video imaging spectroscopy with high spatial resolution for three different magnetic configurations was performed. A strong variation of the emission of the neutral tungsten in toroidal direction and corresponding W erosion has been observed. It correlates strongly with the wetted area with a maximal W erosion at the edge of the divertor tile.
| Original language | English |
|---|---|
| Pages (from-to) | 118-124 |
| Number of pages | 7 |
| Journal | Nuclear Materials and Energy |
| Volume | 18 |
| DOIs | |
| State | Published - Jan 2019 |
| Externally published | Yes |
Funding
This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
| Funders | Funder number |
|---|---|
| Euratom research and training programme 2014–2018 | |
| Horizon 2020 Framework Programme | 633053 |
Keywords
- JET-ILW
- PFC
- PSI
- Tungsten erosion
- Tungsten imaging spectroscopy
- W Divertor
