I agree, the logarithm must come from the circular tip shape somehow. Hmmmm...not sure what to think at this point.
Thanks for looking into it for me !
Thanks so much. I know, having done endurance testing on polyethylene with embedded needles, that the tip radius is the most important factor in knowing the highest field intensity. I suppose this is because the smaller the radius, the more divergent the field, thus the higher the field...
Hi folks. I have read in several papers that the electric field intensity adjacent to the very tip of an electrode (the "point" in a point-plane geometry) surrounded by a dielectric medium is given by
2V / [r ln(4d/r)]
where r is the tip radius, d is the point-plane spacing, and V is...