CS current and fatigue
#3191
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The models of the CS and PF coils are a rather rickety structure, all standing on an input like this:
This component is the CS current:
pfv.cptdin[pfv.nohc - 1]. This determines the number of turns and therefore the size of the conductor. This causes trouble whenever there is anything that sets an absolute scale for the coil conductor - specifically, the CS fatigue model (class CsFatigue). This is based on assumed initial crack sizes, whose initial default values are:(although
t_crack_radialis subsequently overwritten).It is up to the user to make sure that the CS current is enough to ensure adequate fatigue life. It is easy to end up in with fatigue life which is very short or even zero.
It would be good to resolve this - either by making the CS current an iteration variable, or by allowing the code to calculate it in some other way.
@ajpearcey @timothy-nunn @chris-ashe @clmould ?
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