Feature wish list

[bendudson]

• A non-destructive way to modify plasma equilibria. Currently adjusting and re-solving modifies the Equilibrium object, so either a way to deep copy or return a modified copy
• Calculation of plasma volume
• Calculation of total stored energy, magnetic and thermal energy
• Output radial profiles of q, Jpar, p etc.
• Forces on coils (structural limits)
• Maximum field on coil (superconductor limits)
• TF coils and forces on them (?)
• A way to specify and modify vessel wall shape
• Calculation of separatrix shape and q95 surface shape in terms of elongation, triangularity etc.
• Field-line tracing to get connection length, flux expansion. Could be used in 2-point model calculations
• Finite coil size, using limits on current density
• Calculation of coil current * radius, proxy for coil size and so cost
• Coil location optimisation, to achieve constraints whilst optimising figures of merit

[ZedThree]

• Add separatix points to equilibrium and make sure output to geqdsk
• Add new file format (pickle?)

[d7919]

• Support for writing out different formats, e.g. transp, chease etc. (motivated by equilibrium types available in GS2 https://sourceforge.net/p/gyrokinetics/code/HEAD/tree/gs2/trunk/geo/ ).
• Support for writing out analytic equilibrium types (e.g. Miller parameters)

[JonathanFraser]

• Avoid rebuilding and inverting constraint matrix on each iteration (performance enhancement)

[bendudson]

• Calculate stability limits using e.g. Mercier criterion, infinite-n ballooning limits
• Control the profiles by specifying current or q profile
• Calculate the bootstrap current, allow Ohmic, RF and NBI current to be added (see e.g. SCENE)
• Coupling to an EPED-like model to estimate pedestal heights?
• Coupling to transport model for core profiles?
• Add a time-dependent capability . This would involve working out the circuit equations for the power supplies to the coils, and adding the capability to calculate currents induced in the walls, and the effect those currents have on the plasma
• Add a fast heat load calculation, including estimating heat flux width (e.g. Eich scaling), and power onto divertor

[bendudson]

• Add Uncertainty Quantification capability, for example to propagate uncertainties in pressure profiles

[AdrianoMele]

Hi! I just found this project and it seems very interesting. Points 3 and 4 should be easy to solve, and I probably have some matlab routines that can be easily ported to python and that I would be more than happy to share. However, those quantities seem to be already available in freegs > equilibrium.py, so those points have probably been solved already?

EDIT - I mean:

• Calculation of total stored energy, magnetic and thermal energy
• Output radial profiles of q, Jpar, p etc.