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Re: [TCML] Re: Breakdown voltages of toroids
>From: b alex pettit jr <a_pettit_jr@xxxxxxxxx>
>Sent: Jun 17, 2008 8:19 AM
>Subject: [TCML] Re: Breakdown voltages of toroids
>Thanks. This linearity is not expressed in the table attached to the
Well.. the 20cm sphere has a radius of 10cm, so 300kV is right on.
the 30kV/cm of radius is only a guideline, and a lot can change it (i.e. if you had 3 1cm radius spheres, each of which individually would break down at 30kV, all lined up side by side, the breakdown voltage is likely going to be higher).
Antonio did his analysis by calculating the field for the various configurations, and so, it's probably reasonably good (assuming uniform surfaces, etc.)
Ross Engineering has empirical test data for theirs.
>And, if so, why do most TC builders now use Toroidal over Spherical shapes ?
>For non-weird shapes with reasonably smooth curves, you can use the smallest radius of curvature to determine breakdown voltage. 30kV/cm is a handy approximation.
>Be aware, though, that the idealized situation of a nice smooth surface and truly "free space" doesn't happen very often.
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