Capacitor building for Air lasers-- HELp!!!!!!!!

[gmpf]

Does it look like Neoprene or Nylon could work as dielectrics in an "air laser"???
what about 3-plate capacitors????

[floh]

neoprene and nylon is to thick. a good condensator needs a thin, high isolating dielectricum. test the foil from a overhead projector.

[ekkard]

Can you or somebody else tell me why not to use a commercial capacitor or an old one from tv set? I don't understand the problem with the "air laser".
That's just for my information - Thanks!

[lightfreak]

Hi Ekkard,

as far as i know, Air (in real world Nitrogen) lasers work with very high voltages (app. 25-30 kV), so no commercial capacitor (no one sombody can pay for) can withstand this voltages.

regards

Simon

[floh]

use a serial circuit of some "low voltage" capacitors. the voltage can be added, the capacity divided.

e.g.: you have 10 capacitors 1uF/1kV
Circuit: --||--||--||--||--||--||--||--||--||--||--
0.1uF/10kV

[phillip]

Aha,
so ist die schaltung bei Kondis.
Endlich erfahren.
Gruss
Phil

[random]

Phil, this is the Laser-Board for the english - speaking - people. !!!Laserboard [en] !!!
If you can write no english then please post in the german laser board.
And I think there is not much information in your message...


@mod: If you want delete both posts ...


Greetings,
thorsten

[lightfreak]

@floh: it's better to add parallel resistors to the caps to split the voltage. I think 1Meg Ohm is good for the job.

Simon