Date: Wed, 27 Mar 2002 07:32:24 -0500

Author: Chuck Britton

Subject: Re: Safety of Van de Graaff Generators

Post:

and just to confuse things a bit more - - -


The length of the spark should be measured between FLAT
parallel plates.
Curvature of either electrode will skew this 'estimate' of voltage
toward a higher than actual value.



At 10:01 PM +1000 on 3/27/02, David Eric Bailey wrote
>I have worked for years using a breakdown potential for air (dry?) of
>15KV/cm to estimate the potential of my VDGs. and I certainly cannot recall
>my source for this figure . Karl has quoted a value of 8KV/cm which is
>somewhat(!) lower.
>
>> Perhaps it can be judged by arc length of the discharge in air,
>>>given that its about 8KV/cm of discharge.
>>>
>Can someone supply a confirmation of either/neither figure or source where a
>reasonable value for the voltage can be obtained ? Ta.
>
>>

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