Nuclear Fusion Idea: Using Magnetic Fields

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Discussion Overview

The discussion revolves around the feasibility of using strong magnetic fields to induce nuclear fusion, specifically within a spherical cavity containing Deuterium and possibly Tritium nuclei. Participants explore various aspects of magnetic confinement, the forces involved in nuclear fusion, and the necessary conditions for achieving fusion.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant proposes using a spherical cavity with increasing magnetic fields to compress Deuterium nuclei for fusion.
  • Another participant points out that magnetic confinement fusion is a well-researched area and questions the original idea's feasibility.
  • Some participants argue that the repulsive forces between closely packed protons are too strong for the proposed method to work without sufficient kinetic energy.
  • There is a discussion about the energy required to overcome the Coulomb barrier for fusion, with some asserting that it could be achieved through electromagnetic means.
  • Calculations regarding the forces involved at very small distances (femtometers) are presented, highlighting the significant challenges in achieving fusion through the proposed method.
  • One participant suggests that a charged sphere might be a viable alternative, but others clarify that particles within a charged hollow sphere would not experience a compressive force.
  • Concerns are raised about the practicality of achieving the necessary conditions for fusion, including the size of the chamber and the energy output versus input.
  • References to existing fusion technologies, such as Tokamaks, are made as potential alternatives to the proposed idea.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of using magnetic fields for fusion, with no consensus reached. Some argue against the original proposal, while others explore alternative ideas and calculations without agreeing on a definitive solution.

Contextual Notes

Discussions include various assumptions about the nature of forces involved in nuclear fusion and the limitations of the proposed methods. Participants highlight the need for calculations and further understanding of fusion technology.

Who May Find This Useful

This discussion may be of interest to individuals studying nuclear physics, engineering, or those curious about alternative approaches to achieving nuclear fusion.

  • #31
With a negligible probability. Scattering at other atoms until the energy is lost is much more likely.
Neutron absorption itself can release energy, but producing fast neutrons (outside a nuclear reactor) is highly inefficient so you don't gain anything. In a nuclear reactor, you better use the fast neutrons to make slow neutrons to keep fission running.
 
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  • #32
Okay last idea, so I looked at fusor calculations and apparently one of them is:
Cross Sectional Area*Particles*Density of target*Target Volume
So I was wondering couldn't we simply increase the target volume or the density? Well actually I guess Density is a bit out of the question as it would have to be around the metallic hydrogen range
 
  • #33
ITER is increasing the volume compared to previous reactors, for example. It also increases the volume to surface ratio, which reduces heat losses.
In general, building something bigger is more expensive, and it is not a miracle that solves all problems - you can gain an order of magnitude or two, but you cannot make a completely impractical concept possible.
 
  • #34
Dt2000 said:
Okay last idea, so I looked at fusor calculations and apparently one of them is:
Cross Sectional Area*Particles*Density of target*Target Volume
So I was wondering couldn't we simply increase the target volume or the density? Well actually I guess Density is a bit out of the question as it would have to be around the metallic hydrogen range
Fusors are net power loser at any scale because they're accelerators and most of the intended particle collisions necessarily miss (don't cause a fusion event) and the energy used for acceleration is lost (thermalized). In other words, if you are selling at a loss, increasing sales volume won't help.
 

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