Best sparks

From:  terryf-at-verinet-dot-com [SMTP:terryf-at-verinet-dot-com]
Sent:  Tuesday, June 30, 1998 8:49 PM
To:  Tesla List
Subject:  Re: Best sparks

Hi Greg,

At 10:47 PM 6/29/98 -0500, you wrote:
>From:  Greg Leyh [SMTP:lod-at-pacbell-dot-net]
>Sent:  Monday, June 29, 1998 11:58 AM
>To:  Tesla List
>Subject:  Re: Best sparks
>Terry Fritz wrote:
>>         I have been playing with secondary arcs and such.  The data, both by
>> measurement and modeling, suggests that secondary arcs benefit greatly by
>> having very fast discharges.  In other words, the top terminal should be
>> large, smooth, and have low RF resistance.  The ground path should also
>> present low resistance.  The arcs need low resistance to RF currents in the
>> range of 5 to 20 MHz.
>Do you believe that the fast time-scale features of the arc
>can make it thru the L of the sec to the ground connection?

        What I suspect is that once the arc breaks out, it needs additional
current very quickly to sustain and help the arc.  In order to get this
current out fast, the top capacitance should be able to deliver charge at
maximum speed.  This event is fairly local to the top terminal and the
surrounding charged space.  There should not be too much coupling back to
the secondary ground except by capacitance around the secondary.  
        It is obvious that arcs have very powerful high frequency
oscillations.  We don't quite understand why but it is probably best to help
those oscillations occur.  When the top discharges at high speed it may be
causing high local field stresses that help push the arc to greater distances.

        Terry Fritz