Re: The Electrum Project

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

Hi Boris, Dmitry,

On 29 Aug 2005, at 13:31, Tesla list wrote:

> 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.

I am sending Terry an email with a condensed version of two sets of
measurements I made somewhere back around 1996. I'm hoping he will
put them somewhere on hot-streamer and broadcast a pointer to the
list.

http://hot-streamer.com/temp/CoilMeasurements.zip

The first set was of a number of resonators I had built with
and without toploads. The second was a set made with a number of
resonators with different size disks mounted at different heights
above the resonators. I have marked a delineation between the two
sets of measurements. Each has its own test notes. I haven't made any
modifications to the originals - simply bundled them into a single
text file. I hope they might be of some use to you. I did them out of
pure interest and broadcast them to the list (might have been usa-
tesla?) when they were completed.
     FWIW I also have a set of measurements of various types of wire
and their influences on coil Qs when used as ground leads taken back
in 1995. That is when I discovered that stranded wire wasn't all that
great and that braid was abysmal.

Malcolm

> 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
>
>
>