The papers are just about the interval up to 50KV, and this is clearly not enough since the LPPX is 45Kv. 90KV is clearly the ideal, but I don`t know the lower value. I`d have to play with the values and I`d have to play with the simulation spreadsheet first. Let me make an estimative though. Saturation occurs when all wasted energy is due the dynamical resistance. So, that means an asymptotic value of V=RI. For an optimized configuration of 100KV, see table 3, ( https://focusfusion.org/index.php/forums/viewreply/7483/ ) is about 1.5MA, we achieve a pinch saturation at 1.5MA @ 35KV. Given that we want saturation to occur at 3MA, we must double the voltage, to 70KV. Give a bit of safety margin, to avoid the flatten curve before saturation, we could say 75KV. So yes, your guess is right.
