What Happens to Electrons in the Center of Polywell Fusion Reactors?

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Discussion Overview

The discussion revolves around the behavior of electrons in the center of polywell fusion reactors, particularly in relation to the magnetic fields generated by the coils. Participants explore the implications of plasma presence and fusion rates on electron stability and movement within the reactor.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions whether electrons remain in the center of the polywell due to the magnetic field or if they drift away over time due to interactions with protons and the magnetic field.
  • Another participant asserts that electrons stay in the center and form a negative potential well, except for those that leak out between the magnets.
  • A further inquiry is made about the conditions under which electrons might remain stable in the center, acknowledging that they may eventually drift away due to the nature of charged particles in a magnetic field.
  • It is noted that the magnetic fields from the electromagnets create a "cusp" where field lines converge, allowing for potential leakage of electrons. Additionally, electrons may be ejected if they receive sufficient energy, although the current plasma temperature may not provide this energy.

Areas of Agreement / Disagreement

Participants express differing views on the stability of electrons in the center of the polywell, with some suggesting they remain trapped while others highlight the possibility of leakage through cusps and the effects of plasma temperature. The discussion remains unresolved regarding the exact dynamics of electron behavior in this context.

Contextual Notes

There are assumptions regarding the strength and uniformity of the magnetic fields, the temperature of the plasma, and the conditions under which electrons might escape or remain stable, which are not fully explored or defined.

Crazymechanic
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Hi , now I was thinking what happens with the electrons that are in the middle of the polywell trapped by the magnetic field coming from the coils?
Assuming there is plasma and some fusion takes place at some rate " x" , what actually happens with the electrons in the middle , do they say there and keep the negative potential or are they slowly drifting away with time due to the magnetic field and the protons hitting them ?
 
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They stay in the center and form a negative potential well except for the ones that manage to leak out between the magnets.
 
so your saying that no matter how intense the fusion rate if the magnetic fields are strong enough and keep them in the middle long enough , they will stay there , if only for the mag field being nonuniform they can leak otherwise their steady there ?
By steady I mean , as steady as a charged particle can be in a magnetic field , ofcourse it will drift away after a while probably.
 
The field from each electromagnet interacts with the other fields from the other magnets and forms a "cusp". The cusp is the region where the magnetic field lines meet. Electrons can leak out through these cusps. Other than leaving through the cusps, electrons can get ejected if you give them a large enough kick, but the temperature of the plasma in the polywell isn't high enough to give them this kick as far as I know.

MaGrid_Operating-TomLigon-Field-2.jpg
 

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