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Von: Jojo Jaro <[email protected]>
An: [email protected]
Gesendet: 21:09 Dienstag, 6.März 2012
Betreff: Re: [Vo]:To RF or Not to RF
> how does
one go about delivering this RF signal and at what freqency. I know it's
just an educated guess but any "wild guess" from a physicist is much much much
better than the most learned guess from me.
--------
jojo,,
just a rough idea:
if your reactive containment is somewhat longish, say 10mm dia, 50mm length and
is conductive (ni-powder or whatever), You have two choices:
maximize U or I in your volume. you do this by making the volume the endpoint
of a transmission line, which is either open or shortcircuited at the end.
If you shortcuircit the end, your maximize the I-component, if it is
open-circuit, U (e-field) is maximized.
To do this, You have to match the total length of your feed-system to the
RF-frequency You use, very carefully.
About how this works, you best study antenna theory and different feed
techniques of the different antenna-types.
Acutally, this is is an atypical sort of non-antenna, because you do not want
to radiate RF, but want to maximize either U or I at the endpoint of a
transmission-line.
Basically I find this interesting and am quite sure, that nobody in the field
ever did this in a systematic manner.
This is a nontrivial task to understand and implement, but not outlandish.
I spent the last couple of years constructing an RF-generator for cold-plasma
generation with mismatched endpoints, to make a sloppy description, at the
typical 13.56MHz, which is a technical frequency.
The concept, as Jones (?) suggested, that there is a broadband noiselike
excitation, is a shot in the dark, and may help, if the process is 'friendly'
to
such a diffuse excitation.
If you are interested, I could go into more details, but this would entail a
precise adaptation of any RF-generator to the exact geometry and physical
construction of the reactive volume.
Else it would be just blind guesswork.
BTW, I am quite sure, that none of the usual suspects ever used moderately
sophisticated RF-excitation in their systems, because a nuclear chemist or any
plain vanilla nuclear phycisist does not understand the peculiarities of such a
system.
And I'm surrounded by a lot of them, rest assured.
OK?
greetings.
