1D SOL morel that can reproduce detached conditions

[orso82]

https://iopscience.iop.org/article/10.1088/1361-6587/ad2b90/pdf

What do @jguterl @halpernf @ggdose think?

[ggdose]

I spent a bit of time reading/studying this paper.

The main theory is the 2point model, which we will definitely implement in FUSE sooner or later. However to reproduce the experimental measurements, some correction factors are computed using the experimental values themselves (factors are physics based but computed a posteriori). Only in this way, the model can reproduce the D3D data.

To be honest, I do not know how this can be useful in FUSE. One possible way is to iterate and to hope to find a solution (no guarantee of uniqueness and most of all stability)

I agree that we need to start tackling this problem. We should start by at least implementing the 2pt model in FUSE. Adding further degrees of freedom, it can always be done in a second step.

[jguterl]

The key addition of this model is the fit of the parallel momemtum and heat losses to a database of SOLPS-ITER simulations. I will implement it into https://github.com/ProjectTorreyPines/BoundaryPlasmaModels.jl/ today and you can look at it.

Disclaimer: prectivite capability of the model depends on the aforementioned fit (amoing other things). We can benchmark it against the SOLPS-ITER simulations of our FPP design point but it is unliklely that it will give accurate results considering that ITER database is mostly built with N and Ne (on top of other 2D considerations).

On another note, there is our in-house "sort of first principle" lambda_q prediction (courtesy of M. Peret). I will add it in https://github.com/ProjectTorreyPines/BoundaryPlasmaModels.jl/

[orso82]

Thank you @jguterl !! Very interesting `lambda_q. I'd like to learn more about it! Maybe a good theory talk to organize sometimes.

[bclyons12]

I know the author of that paper well. I'm happy to connect anyone with him if they want to discuss more.