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Old Aug 19th 2018, 11:20 AM   #1
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Post concentrated magnetic field

Hi

I want to make a strong magnetic field using electricity.
and concentrate it in a small point.
I can't use a core other than air. (actually the core will be plasma)

I have to implement a tube with a very big length-diameter ratio.
so the best applicable procedure I think is :
  1. make at least one solenoid coil around a glass tube
  2. suck out air to achieve some vacuum inside tube
  3. apply very high voltages to tube ends
  4. apply an adjustable voltage to coil(s)

the question is :
what kind of coils do you recommend ? (the shape, numbers, anything)

the ideal result I'm looking for looks like the attached image. (except the coils, they are the question)
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concentrated magnetic field-02.jpg  
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Old Aug 20th 2018, 04:28 AM   #2
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So you are basically putting magnetic coils around a neon tube (or similar)
and trying to control the magnetic flux in the plasma.

This looks very similar to certain fusion experiments (from the pre-tokomak days)
The feedback between the magnetic fields and currents in the plasma can become complex...

I suspect that you will find that the mathematical models for this problem are well defined
(perhaps someone can point the way to them for us)
however, you may find that the practical issues of control will be rather difficult.
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Last edited by Woody; Aug 20th 2018 at 04:31 AM.
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