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Re: Optimal quench tests -- round 2
Subject: Re: Optimal quench tests -- round 2
]
Date: Fri, 14 Mar 1997 00:16:57 -0500 (EST)
From: richard hull <rhull-at-richmond.infi-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
snip
>2) as the quench time lengthens, the center frequency weakens and
>finally disappears from view. Again, this system is unloaded and produces
>no sparks. The "rules of the game" for a sparking TC may differ greatly. A
>lot depends on how much of the total system energy is released into spark
>production BEFORE the quench.
>
>Perhaps Richard Hull's upcoming hydrogen thyratron experiments can answer
>these questions in a spark-producing system.
>
>Happy and quenchy coiling,
>
>John Freau
>
>John,
Your last statement was profound. I think it is all going to boil down
to
how much total system energy are out of the system or trapped in the
terminal capacitance as potential energy at quenchtime. A larger
terminal
would mean a classically longer input time (RC), but I believe the
lowered
base impedance of the resonator at the critical rise level is so low
that,
for the most part, the capacitor fills instantly and discharges over a
much
longer time.
This is interesting for I just noted this effect with large terminals on
the
electrometer circuitry I am developing. It is quite simple actually.
Potential itself of a moving charge (charged object) is injected and
detected instantaneously, or very fast in the circuitry as the potential
of
the ball is elevated by capacitively coupled voltage effects from afar.
However, once in the instrument and the ball is charged, the input
impedance
of the amp (10 teraohms) holds the voltage level for a long period and
the
received signal which appeared nearly instantly can take as long as 35
seconds to decay to the 33% level.
Until air breakdown and a low impeadance path occurs a toroid or its ilk
might real be charged fast coulombically from the rapid charge effects
and
low base impedance of the resonator. This charge would not go away due
to
the high impedance of the air until actual break down occurs.
I note in slow motion video, that any major individual streamer from
maggey
#11-E can easily take 8-10 frames from break out to touching the wall
10'
away and final die out. I have mentioned this on this list before.
That is
.8 to one full second from beginning to end of a single arc channel!
The
coil had the .03ufd cap charge and discharge, The primary couple, and
the
gap quench 400-500 times duing this single spark interval! The terminal
and
its capacitance had to be involved in this action. This capacitor can
supply a good reserve of arc channel current to the arc as it fingers
out
over .5 seconds to extend the range of the system over a bare resonator.
Richard Hull, TCBOR