Camilo wrote:
> well, so what you say about the best ability to ionize of high
> frequency HV, does apply also to pulsed DC? I mean żIs It better to
> ionize using high frequency pulses of HV than low frequency pulses of
> HV (or DC HV)?
>
There's no "best", since it really depends on the needs of your
application.
Simple home negative ion generators will work fine with low current HVDC
from a small voltage multiplier (a few kV).
Industrial electrostatic precipitators or electrostatic separators
require significantly higher HVDC voltages (50 kV, 10's or even 100's of
mA) and currents.
For making non-equilibrium air plasmas (such as ozone generators or
chemical reaction chambers for pollution control), high frequency
barrier discharges or pulsed discharges are often the most efficient
methods.
Ion generators for electrostatic discharge (ESD) neutralization use AC
or pulsed DC corona discharges to generate ions of both polarities. Here
are a couple of articles that discusses ionization and air ionizers (for
ESD suppression):
http://www.tkb-4u.com/articles/other/esd/Air_ionization/Air_ionization.php
http://www.ce-mag.com/archive/06/ARG/steinman.htm
If you're looking for a simple negative ion generator for home use,
there are LOTS of ads and claims by various manufacturers, but much of
this is colored by unsubstantiated claims and advertising hype.
What is your application??
Bert
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