Development ideas from code camp

[adrianaghiozzi]

Core plasma physics

• Q profile optimization actor (rather than setting up a full multi-objective optimization run to tailor q profile)

Edge plasma physics

• Enrichment: how many times more concentration you have of an impurity at the edge compared to in the core => Simple model that predicts the scaling of the impurity concentration profile: https://dx.doi.org/10.1088/1741-4326/ad3139

Engineering/build

• Design of passive structures based on vertical stability => Rail or other defined area on which passive structures could be placed
• Calculation of the stresses on the PF coils => informs the amount of steel that goes into PF coils

Multi-objective optimization

• Check function that ensures the user has set the corresponding requirements in ini for each constraint function selected
• Simple functions for generating 2D histograms to analyze optimization results
• Explain in some tutorial how to temporarily add a cluster for optimization runs rather than directly editing FUSE.parallel_environment source
• Distance from the selected constraints, whether overshooting or undershooting, as a parameter in the risk => Use overall risk as an objective and close in on the constraints by penalizing in risk when you’re far away from constraints
• Neural net based on optimization results, identifying trends => useful for non-linear uncertainty propagation

Backend/user interface

• Allow users to change materials costs by directly interfacing with FusionMaterials Material objects rather than changing FusionMaterials source
• Show the expression that is being used to evaluate a certain field in dd
• Bug: help_plot(dd.balance_of_plant) throws an error with :linewidth attribute (key :linewidth not found)
• Define a distribution structure that gets passed to ini and use that distribution to assign weights to the range of initialized parameters => Applicable to the database generator: Addressed by @mgyoo86 in New OptParameterDistribution to use Distributions package SimulationParameters.jl#12
• Add a plot of plasma heat flux to digest

Time dependence

• Add helper functions for setting up more complex ramp up phases => e.g. Go from circular bore to temporary lower single null to double null
• Setting of density in ini in time dependent simulations - should the user be allowed to set a Greenwald density such that changes in Ip will update core density or should the user choose only pedestal density and allow core density to be fully determined by pellet source?
• Allow resetting of PF coil optimizations based on equilibria for multiple time slices

[mgyoo86]

@adrianaghiozzi
The following PR is a fix for the plotting bug described in the Backend/user interface part.

ProjectTorreyPines/IMAS.jl#223

[adrianaghiozzi]

@mgyoo86 Thanks Min-gu!

[mgyoo86]

@adrianaghiozzi
FYI, I opend a new PR (#794) to address the following feature.

Backend/user interface

• Show the expression that is being used to evaluate a certain field in dd