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Current drive fractions do not add to 1 #1853
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In GitLab by @kj5248 on May 18, 2023, 12:00 Bootstrap_fraction______________________________________________________ (bootipf)_____________________ 7.0000E-01 |
In GitLab by @stuartmuldrew on May 18, 2023, 16:53 I'm confused in the above example as there is no heating and current drive. I think this goes back to the odd way PROCESS has handled the bootstrap current limit, where it enforces the maximum by overwriting the value rather than modifying the plasma solution. |
Related issue #3273 |
@chris-ashe and I have looked at this and it seems that the current fractions are decoupled in how they're calculated and relate to one another. The non-inductive current fraction is an iteration variable but I can't see what constrains its value? This then sets the plasma driven current but as that is bootipf + diaipf + psipf, it doesn't then report the fractions correctly summing to 1 as bootipf is the only value reported, not plasipf. Also, the inductive fraction has no relation to the CS whatsoever, it's simply: 1 - non-inductive fraction |
In GitLab by @mkovari on May 18, 2023, 11:53
This code falsifies the current drive fractions so they do not add to 1. No error message appears in the output file.
@stuartmuldrew ?
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