Kapanadze and other FE discussion

[stivep]

Hi magpwr,
"Grenade" coil in Kapanadze, Akula and others- I think the purpose is to slow down electromagnetic wave propagation.
It is slow wave helical transmission line, coil wound in a curious way.
This is to physically reduce the size of the coil  to accommodate wave of lower frequency.
Tesla secondary and "extra" coils are exactly slow wave structures, to accommodate quarter wave  in kHZ 
area, to minimize radiation of electromagnetic energy.
The aim is to efficiently accumulate energy from primary LC circuit, with minimal radiation into space.
Very interesting subject to explore. I still don't understand the way "grenade" coil works and why that way of coiling.
Kind Regards,
Pix

https://www.commutefaster.com/ATechnicalAnalysisofTeslasExtraCoilasaSlow-WaveHelicalResonator.pdf
A Technical Analysis of the Extra Coil as a 
Slow Wave Helical Resonator 
James F. Corum, Ph.D.
_{Department of Electrical Engineering
West Virginia University
P0 Box 6101
Morgantown, West Virginia 26505-6101}

Kenneth L. Corum
_{CPG Communications, Inc.
158 Salem Street
Wilmington, Massachusetts 01887}
They are the guys  responsible for Viziv  and Milford Texas Tesla Tower
Wesley

[pix]

Hi folks,
It  some thought experiment.
Imagine that at the same time from the same source  we feed step up signal to straight conductor and slow wave structure ( for example loaded transmission line).
If we connect osciloscope at the ends we should see an impulse, due to electromagnetic wave ( potential) propagation time difference.
Am I right?


Regards,
Pix

[stivep]

Imagine that at the same time from the same source  we feed step up signal to straight conductor and slow wave structure ( for example loaded transmission line).
If we connect oscilloscope at the ends we should see an impulse, due to electromagnetic wave ( potential) propagation time difference.
Am I right?

simplified but not always correct answer:
You will see the same  signal coming with delay as slow wave  comes later,
that may be seen as phase delay.

For easier understanding here is an example.
First path:
_{Think that  straight line from  New York to to Warsaw ( or from bottom of Tesla coil to its top) is =x in meters.}
Second path:
_{you created  additional path.
It is a coil with diameter  1mm  wire 
winded tight on the tube of diameter 1 meter
and  long from  New York to to Warsaw ( or from bottom of Tesla coil to its top)=x multiplied by n times of x  in meters.
conclusion:
-signal on that coil will travel many times longer till it reaches its destination.}

But you may  also want :
_{-this coil to resonate....
-convert an input voltage pulse into radiation
-have impedance match to desired 50 Ohm.}

____________________________________________________________________
and here will be difficult.
<sub>Green's function is the solution to the differential equation with a forcing term given by a point source.
point source  was explained here :
https://overunity.com/18335/wireless-energy-transfer-experiments-builders-board/msg560319/#msg560319
green  function  is explained here :
https://brilliant.org/wiki/greens-functions-in-physics/
https://en.wikipedia.org/wiki/Green's_function

I created there  accent on line source in my  (Dr. Corum) energy transfer we are interested  in  line source not point source  but we still need slow wave .</sub>
https://overunity.com/18335/wireless-energy-transfer-experiments-builders-board/msg560720/#msg560720so


And now you are ready to read this article  that brings you closer toTravelling wave tube :_{https://www.egr.msu.edu/~pz/sws2012.pdf
Travelling wave tube was discussed here :    https://overunity.com/17735/wesleys-kapanadze-and-other-fe-discussion-forum/msg561071/#msg561071
however we don't need any longer traveling wave tube we can do it with semiconductors now.}

Wesley

note: _{the article  from below applies to  slow wave in plasmas and is not directly related to our case.
article is given here just for the purpose of  bringing some understanding of slow wave. 
The common and important is 2D wave !!! marked  in the article with light green color.
the same 2D wave we use in my  energy transfer and energy extraction  from Schumann  waveguide in TM mode
TM mode - means Transverse Magnetic mode
explained here:
https://overunity.com/18335/wireless-energy-transfer-experiments-builders-board/msg560165/#msg560165}

note: word _{Travelling wave tube} is sometime wrote _{as Traveling wave tube with one L.}

[stivep]

Some videos explaining traveling wave tube.
Please disregard  fact that it explains different tubes mostly in frequency region of very high frequencies.

This is an addition to the post  from above.
_{Travelling Wave Tube Amplifier https://www.youtube.com/watch?v=I-DlgOoz978
Travelling Wave Tube Amplifier https://youtu.be/lL3LqFTW5ms?t=99Teardown of a Microwave Amplifier and a Traveling Wave Tube https://www.youtube.com/watch?v=0HGdQ0C7CYg
Traveling Wave Tube Amplifier Teardown https://www.youtube.com/watch?v=RyO0Laz6aLA
Teardown of a LogiMetrics A300/S Traveling Wave Tube Amplifier https://www.youtube.com/watch?v=mhUGVfqy3Ic
LogiMetrics A300/S 2 - 4 GHz Traveling Wave Tube Amplifier - Repaired https://www.youtube.com/watch?v=TfxJitmqOEk}

here is modern reincarnation of Traveling wave tube form :
_{https://www.youtube.com/watch?v=A-Fcf8TmnEQ
it is good to understand  how it works but we  are using very low frequencies in our  study leading to  energy transfer and energy extraction.}

Standing Waves: how are they different from travelling waves? | A Level Physics
https://www.youtube.com/watch?v=JUFpDFDQn0E




note: _word Travelling wave tube_{is sometime wrote as} Traveling _{wave tube} with one letter L.

Wesley

[stivep]

another application for slowed down traveling wave:
the particle accelerator.
2.4 Linacs: traveling wave
https://www.youtube.com/watch?v=8XYHO3bQkPI
well...well...       it is Russian translated into English.. 


I like  this one:
_{it is  great (not Russian)}
Linear Particle Accelerator (Principle, Construction, Working)
https://www.youtube.com/watch?v=C79838wtRZo
_{The two links at the end of that video  will advance you to circular/spiral accelerator  Cyclotron and Synchrotron
A synchrotron is made of a torus shaped tube, whereas the cyclotron is made of a cylindrical or spherical chamber.
A cyclotron can fit in a room. A synchrotron is often the size of a football field
https://www.youtube.com/watch?v=L5zhpLfnqGc
https://www.youtube.com/watch?v=Q9bijrQfS6E
https://www.differencebetween.com/difference-between-cyclotron-and-vs-synchrotron/}
Wesley