DRSSTCs and Long Pulse arcs (corkscrew effect) / Tesla Coils / Forums

Forums

4hv.org :: Forums :: Tesla Coils

« Previous topic | Next topic »

DRSSTCs and Long Pulse arcs (corkscrew effect)

previous 1 2 3 next

Move Thread

LAN_403

Terry Fritz

Sat Jul 15 2006, 09:01PM

Registered Member #393 Joined: Tue Apr 18 2006, 12:30AM
Location:
Posts: 297

Hi Dan,

Wonderful pictures and data!!! They make cool screen backgrounds

I have tries using a super powerful magnet to fiddle with the corkscrews on a tube coil. I'll quote a post about it here:

""""""""""""""""""""""
Hi,

I tried a little test today.

I went to the local magnet deli and got a large 2.5 inch dia 1/2 inch thick
round magnet with a 3/4 inch center hole:

It is the NdFeB type and rated at 1.21T

This magnet sets happily on my tube coil:

So how does it affect the corkscrewing?

Without:

With:

It is hard to tell from the pictures, but as far as I can see first hand,
it makes no difference at all... Flipping the magnet to the other side did
not affect anything.

Maybe this will mean something to somebody...

Cheers,

Terry
""""""""""""""""""""""""

So I never saw in great effects from the magnet... I was sort of thinking the corkscrew has something to do with heat...

My little test was not real conclusive or anything but I thought I would mention it.

Cheers,

Terry

HV Enthusiast

Sat Jul 15 2006, 11:29PM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Very interesting Terry. Do you know if anyone has done any actual research into this phenomenon and published data over the years? I know that Bjorn mentioned the Birkeland stuff, but didn't know if you knew of some actual papers on the subject.

Terry Fritz

Sun Jul 16 2006, 01:02AM

Registered Member #393 Joined: Tue Apr 18 2006, 12:30AM
Location:
Posts: 297

Hi Dan,

Although the effect is commonly obsserved, I don't know of any "offical" real science papers on it.

I should note that I found these pictures:

Which do show the powerful magnet deflecting the streamers. So maybe my little experiment was just not setup right to really detect anything.

Electronis traveling in a magnetic field do travel in a corscrew path if that means anything here:

Cheers,

Terry

Bjørn

Sun Jul 16 2006, 03:24AM

Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058

Birkeland wrote a large amount of articles about plasma and how it behaves. Most of it based on experiments, even today math is not very suitable for explaining plasma behaviour. The articles are hard to find and mostly written in French.

There are many articles to find about Birkeland (field-aligned) currents in plasma but they often focus on one particular application like solar prominences. American Scientist, march-april 2000 has one such article.

Tom540

Sun Jul 16 2006, 05:21AM

Banned on 3/17/2009.
Registered Member #487 Joined: Sun Jul 09 2006, 01:22AM
Location:
Posts: 617

Try hanging the magnet right over it. See if the sparks bend around it or try to bend around it.

Marko

Sun Jul 16 2006, 11:44AM

Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

If I remember correctly such magnets can be used to generate vortexes of plasma, but it worked only with DC arcs.
Magnet was put under water (smooth conductive surface) and breakout point was set rom above.

TC frequency may just be too high for any effect to be observd. (?)

Cockscrew effects may ocur in plasma's altering magnetic field but not necessaryly affected using permanent magnets (??).

And I may be just talking crap also.

Coronafix

Mon Jul 17 2006, 03:30AM

Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938

There is always this picture.

ragnar

Mon Jul 17 2006, 04:22AM

Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425

That looks suspiciously like crappy breakout on two helical wires with a similarly crappy long exposure =P

Coronafix

Mon Jul 17 2006, 06:52AM

Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938

You could be right. I don't know. It does say 1 min long exposure. Here is a bit of psuedoinfo on it.

ragnar

Mon Jul 17 2006, 07:12AM

Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425

Wow, I can't believe I just read that.

..still, the helical discharge is very pretty. I'm gonna bend some wires into that shape and make them spray corona, it looked funky. Might make a good high-res photograph (if I had a high-res camera, HA) =)

TDU, I know you've got a pic of a plasma discharge inside a tube distorted by a big speaker magnet... I've never been sure if it was because of the presence of the field, or the capacitive effect of a big metallish object against the glass?

These are interesting (and not pseudosciencey, bonus! hehe) too:
contorted plasma fun at Mike's electric stuff

previous 1 2 3 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob