Fusion power in summary IDS

[fcasson]

It does seem odd to me that summary IDS has no place for the total instantaneous fusion power.  If I read the definitions correctly, fusion/power is actually for the alpha heating (after slowing down, to be made explicit?).  I know it can be derived from the neutron rates, but I would have expected total fusion power to be a primary quantity of interest

https://imas-data-dictionary.readthedocs.io/en/latest/generated/ids/summary.html#summary-fusion-power 

Because of slowing down, the total fusion power is not exactly fusion/power + fusion/neutron_power_total

I also find the node name to be misleading, but in general I am against these kind of breaking changes and elsewhere advocated against DDv5.

[olivhoenen]

Nudge @MireilleSchneider @imbeauf @SimonPinches

[imbeauf]

I have no objection to add it, but let's wait for the opinion of other persons.

[ksunhee8]

The absorbed fusion power (if this is meant by the instantaneous fusion power including slowing down) would be interesting quantity for the fusion power control and burn control, assuming that the alpha slowing down time will have an order of second.

[fcasson]

This is my understanding of what should already be in fusion/power - DD says "Power coupled to the plasma by fusion reactions" which I was interpreting as "Power coupled to the thermal fusion plasma by fusion reactions"

[SimonPinches]

The possible misinterpretation of these fields was spotted last year in the context of developing SimDB. I'm happy for a new field to be added for the total instantaneous fusion power and for the description of fusion/power to be improved in a way that doesn't trigger a new major version if thought necessary.

[imbeauf]

I have tried to do that, see #201

[imbeauf]

PR #201 merged, I am closing the discussion