Minutes of the meeting on proposal discussion within the SOL trasnport subgroup
date: 09.03.2022
Discussion on the introduction to the meeting
Flat-top requirements for diagnostics:
- 2D He beam => 1-2 s
- MPM => 0.5 s
- Alkali beam => no requirements (fast measurements), if Ti measurements available, expected time resolution of 100 ms
Flat-top also required for comparison to EMC3-Eirene (only steady-state conditions can be modelled)
Comment on flat-top request by Yu Gao: what about the bootstrap current evolution? The bootstrap current might change the transport conditions due to the change in iota. Possibility to deal with it:
- development (probably by Yu?) of a scenario to keep constant iota in the commissioning phase
- keep the plasma experiments relatively short to avoid strong changes (from OP1.2b, for standard configuration changes visible at around 5 kA)
- reproducing the effect of the small iota changes in the simulations as well
Comments on the proposal gouping:
- "Estimation of the perpendicular diffusion coefficient" can be merged to the proposal by Jim Terry in the SOL turbulence subgroup, but the study is also linked to the power exhaust subgroup (Yu should be involved)
- proposals on radiation stability and influence on SOL parameters by Daihong and Gabriele could be merged => more on this in the next meetings maybe presented by Felix. The effect of radiation on the SOL parameters could be touched in other groups too (spectroscopy? detachment?), even though the focus could be on line radiation and not total radiation