New proposed bootstrap surrogate model

[mkovari]

Sugiyama et al have submitted a new scaling for bootstrap current, based on a large database of runs using ACCOME. The paper is still under review so should remain confidential for the time being. I am writing this issue so we don't forget.

Table 3: The values of the input parameters in the ACCOME analyses to derive the bootstrap current fraction scaling for the case
of the H-mode plasma profile.

I admit this looks a little ropy.

Proposed title: Improvement of core plasma power balance model for tokamak systems code considering H-mode plasma profiles

Proposed solution

The surrogate model is a simple power-law scaling in the variables listed in the table above.
Comments @chris-ashe ?