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eeka chu
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Questions garanteed to have you doing right handed impressions of rap artists by the end! :tongue:
Now I am much happier with electronics, I decided to start reading about magnetics. However, I'd appreciate any help you could provide with a few things I'm thinking about.
First of all - coils.
If I wrap a piece of wire round and round into a helical solenoid shape, I get magnetic poles at the 'open' ends - the top and the bottom if your coil is vertically inclined.
North
|***|
|***|
|***|
|***|
|***|
South
The flux here is trying to move between points on the same plane in the same axis.
Now imagine if I was to take the coil an begin wrapping a new coil, identical to the first, with the original - forming a coil from coiled wire. From what I can tell, the coil should now have two dimensions of 'activity' if you like - as the original coil will be emitting a field, but the field forming coil is, it's self, in a coil formation. Where would the magnetic poles appear with the new coil?
One step tricker... how about winding this coil into another new one. To give the coil three dimensional activity?
Begin rapping!
Another thing that was confusing me was plasma reactions.
The Joint European Torus (JET) here in England is experiementing with fusion reactions.
As it's name suggests, the JET reactor is a toroid - A donut shape. It's a jamless toroid.
The reactions occur at hundreds of millions of degrees, so they can't touch any part of the reactor, otherwise it'll melt. So the reaction is plasma based and magentic confinement is used to lift the plasma off the walls of the reactor.
Okay... the easy part first.
Imagine you're looking at the reactor from above it or underneath it, so it looks like a donut on a table. If you have flux flowing clockwise or anticlockwise around inside the donut, you have something very similar to the core of a toroidal transformer - which is great at concentrating flux inside it's core and not emitting it as noise, since it's a sealed magentic circuit.
Now imagine you slice into the donut and look into it so that you are looking at a circular shape - looking at what's happening inside it.
If the field is coming towards you, or moving through you and into the donut cross section infront of you, the arrangement is very similar to a particle deflection chamber.
If a charged particle was place into the field, it would try to spin or deflect around the circumfrence of your donuts circular cross section. Because the particles in the plasma are positive nuclei and negative shell electrons, one set will spin clockwise, and the other anticlockwise.
As both have a component of force trying to push them around inside the toroid, they will form a helical shape with flutes going clockwise and anticlockwise.
This is ignoring the fact that the flux it's self is flowing in a helical pattern inside the toroid's core - but I'm not sure if that makes a difference since it's polarity is not changing.
This kind of containment would be useless on it's own. All a flux like this is doing is making the plasma spin inside the core. If anything, that would cause a centrifugal effect that would push the plasma out towards the walls of the reactor right?
So, I started thinking, perhaps they have some other kind of coil arrangement to push the plasma back off the walls instead?
Cool.
But, how could it possibly push both halves of the plasma away from the walls at the same time?
If the plasma is a usual thermal or cold plasma, it will contain positive and negative charges.
Keeping things as simple as possible, if the magnetic containment is of a stationary polarity, it will contain one charge whilst simulatenously attracting the other.
I know that these reactors currently have problems with plasma leaking out of the field. That can't be due to the methodology of the containment though since fifty percent of a neutral plasma would be leaking out. Which would probably melt the reactor in a few seconds. So it must be due to the real world practical limits.
Imagine a single hydrogen atom. Split the electron away from the proton. In an alternating magnetic field, taking only their charge into account, there should be no net change between them. One will move one way, field changes polarity, it moves the other way to the same extent.
The only difference would be their mass, and so, how rapidly they would respond to the polarity changes. I don't like that idea though because it seems far to rough.
Now I'm left wondering how they manage the effect.
Would it have something to do with the poloidal field that is also in use?
I hope you enjoy thinking about these!
Best wishes!
John
Now I am much happier with electronics, I decided to start reading about magnetics. However, I'd appreciate any help you could provide with a few things I'm thinking about.
First of all - coils.
If I wrap a piece of wire round and round into a helical solenoid shape, I get magnetic poles at the 'open' ends - the top and the bottom if your coil is vertically inclined.
North
|***|
|***|
|***|
|***|
|***|
South
The flux here is trying to move between points on the same plane in the same axis.
Now imagine if I was to take the coil an begin wrapping a new coil, identical to the first, with the original - forming a coil from coiled wire. From what I can tell, the coil should now have two dimensions of 'activity' if you like - as the original coil will be emitting a field, but the field forming coil is, it's self, in a coil formation. Where would the magnetic poles appear with the new coil?
One step tricker... how about winding this coil into another new one. To give the coil three dimensional activity?
Begin rapping!
Another thing that was confusing me was plasma reactions.
The Joint European Torus (JET) here in England is experiementing with fusion reactions.
As it's name suggests, the JET reactor is a toroid - A donut shape. It's a jamless toroid.
The reactions occur at hundreds of millions of degrees, so they can't touch any part of the reactor, otherwise it'll melt. So the reaction is plasma based and magentic confinement is used to lift the plasma off the walls of the reactor.
Okay... the easy part first.
Imagine you're looking at the reactor from above it or underneath it, so it looks like a donut on a table. If you have flux flowing clockwise or anticlockwise around inside the donut, you have something very similar to the core of a toroidal transformer - which is great at concentrating flux inside it's core and not emitting it as noise, since it's a sealed magentic circuit.
Now imagine you slice into the donut and look into it so that you are looking at a circular shape - looking at what's happening inside it.
If the field is coming towards you, or moving through you and into the donut cross section infront of you, the arrangement is very similar to a particle deflection chamber.
If a charged particle was place into the field, it would try to spin or deflect around the circumfrence of your donuts circular cross section. Because the particles in the plasma are positive nuclei and negative shell electrons, one set will spin clockwise, and the other anticlockwise.
As both have a component of force trying to push them around inside the toroid, they will form a helical shape with flutes going clockwise and anticlockwise.
This is ignoring the fact that the flux it's self is flowing in a helical pattern inside the toroid's core - but I'm not sure if that makes a difference since it's polarity is not changing.
This kind of containment would be useless on it's own. All a flux like this is doing is making the plasma spin inside the core. If anything, that would cause a centrifugal effect that would push the plasma out towards the walls of the reactor right?
So, I started thinking, perhaps they have some other kind of coil arrangement to push the plasma back off the walls instead?
Cool.
But, how could it possibly push both halves of the plasma away from the walls at the same time?
If the plasma is a usual thermal or cold plasma, it will contain positive and negative charges.
Keeping things as simple as possible, if the magnetic containment is of a stationary polarity, it will contain one charge whilst simulatenously attracting the other.
I know that these reactors currently have problems with plasma leaking out of the field. That can't be due to the methodology of the containment though since fifty percent of a neutral plasma would be leaking out. Which would probably melt the reactor in a few seconds. So it must be due to the real world practical limits.
Imagine a single hydrogen atom. Split the electron away from the proton. In an alternating magnetic field, taking only their charge into account, there should be no net change between them. One will move one way, field changes polarity, it moves the other way to the same extent.
The only difference would be their mass, and so, how rapidly they would respond to the polarity changes. I don't like that idea though because it seems far to rough.
Now I'm left wondering how they manage the effect.
Would it have something to do with the poloidal field that is also in use?
I hope you enjoy thinking about these!
Best wishes!
John
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