Add FieldPoyntingFlux reduced diagnostic #5475
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The periodic boundaries are handled explicitly in the calculation
Now only calculates component normal to the surface. Now works in RZ (for only one mode)
dpgrote
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This adds a reduced diagnostic that calculates the Poynting flux on the surfaces of the domain, providing the power flow into and out of the domain. This also includes the time integrated data.
When using the implicit evolve scheme, to get the energy accounting correct, the flux needs to be calculated at the mid step. For this reason, the
ComputeDiagsMidStepwas added which is called directly at the appropriate times.Because of the time integration, there are two main differences of this reduced diagnostic compared to the others. The first is that it is calculated every time step in order to get the full resolution in time. The intervals parameter still controls how often the diagnostic data is written out. The second is that a facility is added to write out the values of the time integration to a file when a checkpoint is made, so on a restart the integration can continue with the previous values. The facility was written in a general way so that other reduced diagnostics can also do this.
The CI test using the implicit solver is dependent on PR #5498 and PR #5489.