Tokamaks and plasma confinement

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rebc
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I have the fundamental understanding of how tokamaks work. Now, why is it not ideal to confine plasmas using a z- or theta- pinch configurations?
 
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rebc said:
I have the fundamental understanding of how tokamaks work. Now, why is it not ideal to confine plasmas using a z- or theta- pinch configurations?

Z-pinches are unstable.

Theta-pinches have problems with end losses.
 
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