Re: The Electrum Project

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: boris petkovic <petkovic7@xxxxxxxxx>

Hi Dmitry ,
I'm reposting this coz' looks like my response didn't
make it through on first attempt.Comments below.
-----



> Original poster: "Dmitry (father dest)"
> <dest@xxxxxxxxxxx>
>
> Hello Boris.
>
> i`ve recently remembered i`ve got one more book -
> Balelyan & Raizer,
> "Physics of lightning and physics of lightning
> protection"
> today i`ve looked through it a bit - have you read
> it? coz i can name
> pages numbers where it`s written practically word
> for word what you
> have told me.
-----
I haven't read that particular one.
But I vaguely recall I've read couple of articles by
these authors dealing with sparks and lightning.
Having an access to databases loaded with articles and
papers published in scientific journals is definitely
an advantageous thing..I used to use one of these in a
search for reliable and up-to-date sources of infos in
order to compose summaries on various subjects of
interest and store them on my computer.

Typing in keywords 'dart leaders'  finds the document
with summary whose outline you read in my post.The
document was dated 24.May 2002.
Such list of summaries I've created to serve mainly as
my personal reminder.Maybe an unusual habit, but I
find it the most useful.

The idea of comparing dart leaders with guided long
streamers isn't so new.I think it was first suggested
by Meeks or Galimberti.

On the other hand,I have "Spark Discharge" by Bazelyan
& Raizer and I can say it is one excellent book for
spark junkies.Highly recommended by many.

In the case you didn't know,good source of online
papers in physics you have also at http://arxiv.org

-----
>
>  > The stepped leader influences the spark lenght
> but old
>  > portions of channel might be fastly conductively
>  > revived by  "dart leaders" however.
>
> portion of what channel?
-----
Of an old channel (to air) path  that remains after
the previous shot.
For this to happen ,I guess ,TC spark does NOT need to
atttach grounded target.
Ever heard of CG lightning beta leaders?
Some of these are traversed by high luminosity waves
traveling from cloud charge source towards the stepped
leader tip.Quite probably the waves are dart leaders.
I imagine something like that can happen during
powerful TC operation.However,as said ,I'm not so sure
if that form of breakdown is trully a 'dart leader' or
not.
-----

> maybe it`s even not a dart leader at all?

-----
Dunno.
>From time to time ,I can't tell the difference between
CNN news and street blues.
-----

>
>  > Anycase,the benefit of using larger isotropic
>  > capacites I find in:
>
>  > d)As arc grows,its loading effect detunes 2-coil
>  > system.
>
> 3-coil system detunes too, as well as 2-coil?
-----
Both detunes.Speculation:Perhaps triple resonance
systems are less sensitive to spark loadings?
----
>
>  > Tunning point shift should be generally less
>  > problematic for systems having resonators with
> big top
>  > capacities.
>
> comparing the streamer capacitance and toroid one -
> yes, but the big
> toroid produce bigger ion cloud across itself - this
> cloud detunes it
> more than smaller toroid, or in the same way -
> proportionally?
-----
I tend to disagree.
For instance,consider chapters 5.4.3 and 5.4.4 from
"Spark Discharge" and make appropriate
comparations.Flash charge vs electrode size study in
particular.I would spot there not very linear
relationships.
-----
>
>  > e)Lower resonating frequency and higher Q .
>
> Qs is proportional to sqrt [Ls/(Ctop+Cs)] - how
> could Ctop increasing
> cause increasing of Qs?
-----
It can.
TCs are distributed circuits.Ls changes as one
increases an electrode capacity.
Q changes,to a certain point,too.
You may want to ask Malcolm Watts about Q msms.He
measured Qs of coils with toroids positioned at
different heights above top turn.

Lotta questions you ask Dmitry.
Now it is my turn to ask you one.
Can you dig from somewhere out what's the energy
storage capacity of  5MV russian marx bank in
Siberia,the pic which of is displayed in book "Spark
Discharge"?I bet the listees would like to know.

Best Regards,
Boris