Tesla coils in a vacuum
Enceladus, Mon Sept 17 2018, 03:03AMJust a simple question that has just popped into my head that I've never seen discussed: Would the secondary side of a TC operate the same in a vacuum as it would in an atmosphere? What about if the top load were to contain a heater and be coated in a low work function substance? Would there be significant thermionic emission, and where would it begin and end? What would it look like and could it be used in things like ion thrusters or other space-based applications? I'm not too sure about any of the answers but I'd love to read anything from anyone who is.
Re: Tesla coils in a vacuum
jpsmith123, Mon Sept 17 2018, 01:33PM
Here's an example of a "Tesla coil" operating in a vacuum (the authors refer to it as a "coaxial spiral-line resonator"). This device uses an array of some kind of graphite field emission cathodes to produce multiple electron beams which are then brought out into the atmosphere through an array of thin foil windows.
jpsmith123, Mon Sept 17 2018, 01:33PM
Here's an example of a "Tesla coil" operating in a vacuum (the authors refer to it as a "coaxial spiral-line resonator"). This device uses an array of some kind of graphite field emission cathodes to produce multiple electron beams which are then brought out into the atmosphere through an array of thin foil windows.
Re: Tesla coils in a vacuum
Justin, Mon Sept 17 2018, 08:32PM
This is what comes to mind.
Justin, Mon Sept 17 2018, 08:32PM
This is what comes to mind.
Re: Tesla coils in a vacuum
Sulaiman, Tue Sept 18 2018, 07:27AM
I've not tried so I'm guessing;
First look at
If the TC is powered whilst pressure is reduced from atmospheric,
then you will get a result like in the video pointed to above (I like his videos)
If a hard vacuum is created before the TC is powered up then there should be no arcs.
As a TC is a.c. I don't know what would happen with the filament but I suspect rectification and most significantly ... x-ray generation.
Sulaiman, Tue Sept 18 2018, 07:27AM
I've not tried so I'm guessing;
First look at
If the TC is powered whilst pressure is reduced from atmospheric,
then you will get a result like in the video pointed to above (I like his videos)
If a hard vacuum is created before the TC is powered up then there should be no arcs.
As a TC is a.c. I don't know what would happen with the filament but I suspect rectification and most significantly ... x-ray generation.
Re: Tesla coils in a vacuum
Conundrum, Sun Sept 23 2018, 08:43AM
Yes, X-rays would be a risk.
Interesting idea though: what would happen to a piezoelectric transformer in a vacuum? Same sort of problem but if it were clean enough it couldn't arc over so would be ideal for certain applications.
Conundrum, Sun Sept 23 2018, 08:43AM
Yes, X-rays would be a risk.
Interesting idea though: what would happen to a piezoelectric transformer in a vacuum? Same sort of problem but if it were clean enough it couldn't arc over so would be ideal for certain applications.
Re: Tesla coils in a vacuum
jpsmith123, Mon Sept 24 2018, 11:18AM
jpsmith123, Mon Sept 24 2018, 11:18AM
Conundrum wrote ...
Yes, X-rays would be a risk.
Interesting idea though: what would happen to a piezoelectric transformer in a vacuum? Same sort of problem but if it were clean enough it couldn't arc over so would be ideal for certain applications.
Yes, X-rays would be a risk.
Interesting idea though: what would happen to a piezoelectric transformer in a vacuum? Same sort of problem but if it were clean enough it couldn't arc over so would be ideal for certain applications.
Re: Tesla coils in a vacuum
Conundrum, Sat Sept 29 2018, 05:03AM
Fascinating link!
I really must try this one day if/when I get my vacuum 2 stage setup going again.
Wonder if it would work in helium (He) at low pressure but still not a vacuum?
Conundrum, Sat Sept 29 2018, 05:03AM
Fascinating link!
I really must try this one day if/when I get my vacuum 2 stage setup going again.
Wonder if it would work in helium (He) at low pressure but still not a vacuum?
Re: Tesla coils in a vacuum
jpsmith123, Sat Sept 29 2018, 05:32PM
Check these out too:
A patent:
and
a thesis (download):
jpsmith123, Sat Sept 29 2018, 05:32PM
Check these out too:
A patent:
and
a thesis (download):
Re: Tesla coils in a vacuum
E.TexasTesla, Sat Oct 06 2018, 02:56AM
Interesting post. I would like to add a question if you don't mind. Suppose you run a bipolar coil in a vac. chamber with a sealed partition between the two output terminals ? Would you see some type of plasma build up as the coil charged both sides of the partition ?
Like plates on a capacitor.
E.TexasTesla, Sat Oct 06 2018, 02:56AM
Interesting post. I would like to add a question if you don't mind. Suppose you run a bipolar coil in a vac. chamber with a sealed partition between the two output terminals ? Would you see some type of plasma build up as the coil charged both sides of the partition ?
Like plates on a capacitor.
Re: Tesla coils in a vacuum
nzoomed, Wed Oct 24 2018, 08:31PM
Would it not simply become a giant X-ray machine sending X-rays out in all directions?
nzoomed, Wed Oct 24 2018, 08:31PM
Would it not simply become a giant X-ray machine sending X-rays out in all directions?
Re: Tesla coils in a vacuum
dexter, Thu Oct 25 2018, 06:40AM
i don't think electrons hitting glass produce X rays
dexter, Thu Oct 25 2018, 06:40AM
nzoomed wrote ...
Would it not simply become a giant X-ray machine sending X-rays out in all directions?
Would it not simply become a giant X-ray machine sending X-rays out in all directions?
i don't think electrons hitting glass produce X rays
Re: Tesla coils in a vacuum
Sulaiman, Thu Oct 25 2018, 11:46AM
AFAIK anything stopping high energy electrons will cause x-rays, glass included.
Even pulling sticky tape off of its reel (in a vacuum) causes x-rays
Sulaiman, Thu Oct 25 2018, 11:46AM
AFAIK anything stopping high energy electrons will cause x-rays, glass included.
Even pulling sticky tape off of its reel (in a vacuum) causes x-rays
Re: Tesla coils in a vacuum
nzoomed, Sun Oct 28 2018, 07:11AM
I did not think that the electrons hitting the glass had anything to do with the production of x-rays, I thought it was the fact that the electrons were moving fast enough to generate them as a side effect.
nzoomed, Sun Oct 28 2018, 07:11AM
I did not think that the electrons hitting the glass had anything to do with the production of x-rays, I thought it was the fact that the electrons were moving fast enough to generate them as a side effect.
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