Containing a plasma with a oscillating cusp?

In summary, the conversation discusses the potential for levitating and stabilizing a conductor in an alternating electric field, using Lenz's law. The question is then raised if the same can be done with a plasma, using a magnetic cusp and oscillating the current. It is determined that this may not be possible due to the lack of tight binding in a plasma. A potential solution is suggested, using a quadropole trap with magnetic fields and induction currents.
  • #1
chandrahas
72
2
I've recently learned that conductors can achieve stability when placed in an alternating electric field. This is because of Lenz's law. So I was wondering if we could levitate a conductor and stabilize it, can we do the same thing with a plasma?

If we can create a magnetic cusp, but oscillate the current fast enough, can we do this in theory?

To me it looks like we can't because it is not tightly bound together. Even then, we still have currents induced right? If that's the case, how efficient or inefficient would this method be?

Thanks for the replies.
 
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  • #2
  • #3
Yeah, but with magnetic fields. This trap depends on induction currents in the conductor instead of electric force.
 

1. How does an oscillating cusp contain a plasma?

An oscillating cusp is a magnetic field that oscillates, or fluctuates, in strength. This fluctuation creates a region of strong magnetic confinement, which can contain a plasma by trapping it within the confines of the cusp's magnetic field.

2. What advantages does an oscillating cusp have over other plasma containment methods?

Compared to other methods such as magnetic mirrors or tokamaks, an oscillating cusp has several advantages. It can operate at lower temperatures and pressures, which reduces the amount of energy required to contain the plasma. It also has a simpler design and is less prone to instabilities.

3. Can an oscillating cusp be used for fusion reactions?

Yes, an oscillating cusp has been proposed as a potential method for achieving controlled fusion reactions. However, more research and development is needed to optimize the design and overcome technical challenges before it can be used for practical fusion energy production.

4. What challenges are associated with containing a plasma with an oscillating cusp?

One major challenge is maintaining the oscillation of the cusp's magnetic field. Any disruptions or instabilities in the field can cause the plasma to escape or become unstable. Another challenge is preventing the plasma from coming into contact with the walls of the containment vessel, which can cause contamination and reduce the efficiency of the system.

5. How is an oscillating cusp created and controlled?

An oscillating cusp is created by using a combination of permanent magnets and electromagnetic coils to produce a fluctuating magnetic field. The strength and frequency of the oscillation can be controlled by adjusting the strength and timing of the electrical current running through the coils. Sophisticated control systems are used to monitor and maintain the stability of the magnetic field.

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