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Is corona discharge bad in a glass capacitor? Answered

About 2 months ago I built a 60Kv 0.03uF glass capacitor with twenty (5mm or 0.2inch) glass plates. There is a small amount of corona discharge around the edges of the glass. I am concerned whether this small amount of corona discharge could be damaging to the glass is this so?


A small amount, no, a lot creates heat which may crack the glass.

So only the possibility of heat, not anything with the corona eating away at the glass as with some plastics?

Yes, pretty well. Consider the amount of energy being lost in the discharge. And minimise it ! Make sure everything is clean and dry, make sure there are no sharp edges to concentrate fields.