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Registered Member #3706
Joined: Mon Feb 21 2011, 04:17AM
Location:
Posts: 11
I've seen pictures of lots of Tesla coils and in some there is a ring of electricity surrounding the coil. It's usually a bit out from the coil (10-20 feet) and has a bunch of strands of electrical energy coming from it. PS. There is a good example of this in my profile pic, if you can make it out.
Registered Member #2628
Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Thats most commonly known as coronal discharge, which is a partial discharge, as it appears to just create a fuzz and not form an actual arc (but given enough time to ionize more air, which is lower resistance it could well arc over pending the distance of its termination point and the potential of the source itself). This is formed by the ionization of the ambient air via high voltage. if that more or less makes sence.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Your profile pic is a time lapse photograph. Let me guess, you've seen a lot of these pics on Tesla Down Under? He takes a time laps photo of a wire spinning around the coil that is connected to the topload. The wire has a single arc coming out from it. It is not an actual electronic phenomenon that you can see in real time. If you read the stuff on making the pics on Tesla Down Under it will explain it more.
Registered Member #3704
Joined: Sun Feb 20 2011, 01:13PM
Location: Vermont, U.S.A.
Posts: 92
In this photo you can clearly see the long wire. It's attached to a motor that is on top of the Tesla coil and spins around. With time-lapse photography, it looks like the photo in Ash Small's previous post. Der Strom
Registered Member #580
Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
The correct term is long exposure, not time lapse. The photo is exposed while the spark is rotated by a full 360 degrees over the length of the exposure, thus producing a photo of a 360 degree spark.
Registered Member #3706
Joined: Mon Feb 21 2011, 04:17AM
Location:
Posts: 11
Oh, I see how it's done. I thought it was just a power thing and when you made a powerful enough coil that ring would appear. Oh well, *goes to disassemble 500 gigavolt Tesla coil*. I had an idea though, using a Tesla turbine to spin a wire fast enough that due to POV the ring would appear. You'd have to spin the wire REALLY fast, but turbines can get over 15k RPM.
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What causes the electrical ring around some tesla coils?
