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Re: Ions n' arcs



Tesla List wrote:

> Original Poster: "Barton B. Anderson" <mopar-at-uswest-dot-net>

Snip

>
>
> I hate to say it, but coils with static style breaks will probably never be
> able to hit this mode of operation. Variable breaks will be needed to tune
> the ionization channel which means small neon powered coils will not last
> under such conditions. It appears input transformers must be of the pig,
> potential, etc.. size and ruggedness to supply such currents, and coils will
> need to be relatively large to handle the beat kicked into it among other
> reasons. I wonder if coils such as Electrum have considered these
> possibilities (probably). It is becoming clearer by the moment that it is
> desirable to design to the type of output desired. There was a time when we
> would design to cause arcs. Now maybe we can design to the type and length
> of arc desired. I doubt that many have designed their coils from the arc
> inward. But it does make sense.
>
> Although you have listed the major arc channel components, I have not seen
> the specs on a coil that would cause extended ionization and arc growth. Do
> you or anyone else have data on such a system including time stamps for
> start of channel and end of channel mean times? Would be very helpful and
> interesting to simulate and see what type of currents and potentials come
> about.
>
> Anyway Richard, thanks for sharing this information,
> Bart
>

Bart,

The static gap can often exceed what a variable rotary can do.  I have seen
them
beat a sync rotary on a Magnifier at 6KW.  The statics, if made by a good
hand,
can quench and chaarge at vastly superior rates compared to many snyc rotaries
and  the result will be a growning discharge system.  The art is in the gap
settings based on gap design system power and the afore mentioned
requirement to
tune the terminal size to the single channel arc mode.  Still, for maximum
flexibilty a fully variable rotary gap of proper design always allows the most
flexibilty and freedom of symboitic adjustment.

 Static gaps are only bad when they are not matched to the system.  NST
systems
often benefit the most from static gaps up to about 3KW.  Static gaps also
allow
NST to last a bit longer in low powered systems provided they aren't opened up
to the limit.  This is becasue they are not real sharp quenchers, as a rule.
Potential transformers can be used with them to 6-7KW.  I suppose someone
could
build a static gap system for higher power, but it would be a bear.

The ion channel reinforcement is a super tough item to model as both von
Engl, I
and you note.  It will be a while before that is worked out.

As regards criterion for arc channel growth.......  Any coil can be brought
into
this region once one tunes for single channel arcs with successively larger
terminals.  If this is done then you are at the best growth point for your
FIXED
ENERGY DELIVERY RATE.  Now any coil tuned as  above can be made to perform
much
better by changing any or all of the following and retuning for single channel
operation.

1.  Peak pulse energy input level  (capacitor sizing or voltage)
2.  Rep rate of energy delivery  (demands variable speed rotary, usually)
3.  Increased in input voltage (some capadjusment might be made)

There are many more subtle items but the above are the key items.  Knowing
which
way to go is pretty much of an art so far as I am concerned.  In some
instances
reduced capacitance increased primary inductance and tank voltage with the
same
or increased break rate will show a vast improvement for a given terminal and
coil system.

 The absolute key is that for any system ready to fire the longest arc tune in
is done with terminal sizing!  While running, this optimum condition can be
honed with break rate and voltage to the final tank, though break rate is most
often used.

Again use the absolute largest terminal you can supply breakout energy to.  If
you still have 1/2 variac left at breakout, get a bigger terminal.

The adjustments are many, and all screw with each other.  That there is an
optimum for a given system is a given along with the fact that some model
might
define this.  But no model can bring the system to maximum operation.  Only a
talented, knowledgable coiler using the ultimate, multi-leveled, integrational
engine of mind and eye can do that.

Richard Hull, TCBOR