Re: Parametric pumping for tesla coils?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>


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From: "Tesla list" <tesla-at-pupman-dot-com>
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Sent: Thursday, May 15, 2003 6:00 PM
Subject: Re: Parametric pumping for tesla coils?


 > Original poster: "Stephen Conner by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <steve-at-scopeboy-dot-com>
 >
 > At 15:25 15/05/03 -0600, you wrote:
 > >With this in mind would it not be entirely possible -at least in theory-
 > >to use these "parametric" methods in the pumping of Tesla coils?
 > >
 > >Could parametric TCs, Q-switching TCs etc, be just be round the corner?
 > >
 > Well I guess so, but it's also entirely possible in theory to make black
 > holes and travel through time ;) How long would it take to make a MMC out
 > of 100,000 varactor diodes? Or are you thinking of rapidly squeezing and
 > stretching the primary with some sort of crankshaft arrangement... Come to
 > think of it, what does "Q switching" mean, the only time I heard that word
 > was when I asked "What does this part of your laser do" at an optics trade
show
 >
Q switching refers to changing the resonant cavity of a laser.  You pump
energy into the lasing medium (originally ruby rod), while keeping the
resonant cavity (the mirrors) non resonant, over a relatively long time
(microseconds) (flash tube duration), then turn on the resonance, the laser
oscillates (lases), and dumps the energy all in one big pulse, very quickly
(nanoseconds).  The Q-switch itself is some form of shutter (Kerr cell,
Pockels cell, Acoustic Optic modulator, mechanical shutter)....    This only
works if the "relaxation time" of the excited atoms is quite long (so you
can get a whole bunch of them excited, without them falling back to ground
state)..

Your basic TC does the same thing... slowly add energy to a capacitor, which
is not part of a resonant circuit (spark gap is "open"), then make a
resonant circuit (close the spark gap) and dump the energy quickly..
milliseconds to charge, microseconds to discharge.

 > Steve C.
 >
 >
 >
 >