Need help understanding how plasma in a Tokamak loses energy.

In summary, plasma energy loss through conduction occurs through collisions between plasma particles and the wall, as well as energy transfer between particles within the plasma and radiation emissions.
  • #1
joker_900
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Mainly I don't get how plasma loses energy by conduction, which is what I have read. Is it just from the collisions between plasma particles and the wall?

Thanks!
 
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  • #2
joker_900 said:
Mainly I don't get how plasma loses energy by conduction, which is what I have read. Is it just from the collisions between plasma particles and the wall?

Thanks!
Plasma interaction with the wall is just one way to loose energy, and that could be a quick way if the plasma quenches. In addition, plasma interaction with the wall would cause first wall atoms (e.g., carbon, vanadium, iron, . . . .) to enter the plasma where they would significantly increase brehmsstrahlung and other radiation losses.

Neutral atoms also conduct heat out of the plasma. They have kinetic energy and simply pass through the magnetic field.

But most energy losses are through radiation.
 
  • #3
I can offer some insight into your question about plasma energy loss through conduction. Yes, you are correct that the collisions between plasma particles and the wall play a significant role in energy loss. When plasma particles collide with the wall, they transfer some of their energy to the wall, causing the plasma to lose energy. Additionally, conduction also occurs through the transfer of energy between particles within the plasma itself. As the particles move and collide with each other, they can transfer energy and ultimately lead to a decrease in overall plasma energy. Another factor to consider is radiation, where plasma can emit electromagnetic radiation and lose energy in the process. I hope this helps clarify the concept of energy loss through conduction in plasma.
 

1. What is a Tokamak and how does it produce and contain plasma?

A Tokamak is a device used to produce and contain plasma, which is a state of matter consisting of charged particles. In a Tokamak, strong magnetic fields are used to confine the plasma in a toroidal (doughnut-shaped) shape, while heating systems are used to increase the temperature of the plasma to the point where fusion reactions can occur.

2. How does plasma in a Tokamak lose energy?

Plasma in a Tokamak can lose energy through several mechanisms, including radiation, convection, and diffusion. Radiation occurs when the charged particles in the plasma emit photons, carrying away energy. Convection is the transfer of energy through the movement of the plasma, while diffusion is the gradual mixing of the plasma with the cooler surrounding materials, resulting in energy loss.

3. How is energy loss in a Tokamak minimized?

To minimize energy loss in a Tokamak, several measures can be taken. These include using strong magnetic fields to confine the plasma, using heating systems to maintain the plasma at high temperatures, and controlling the density and purity of the plasma to reduce the effects of diffusion. Additionally, researchers are constantly working on improving the design and materials used in Tokamaks to increase their efficiency.

4. What is the role of plasma instabilities in energy loss in a Tokamak?

Plasma instabilities, such as turbulence, can contribute to energy loss in a Tokamak by disrupting the confinement of the plasma and causing it to mix with cooler materials. These instabilities can be caused by a variety of factors, including the shape of the magnetic fields and the interactions between different plasma particles. Understanding and controlling these instabilities is a major focus of research in the field of plasma physics.

5. Are there any potential solutions to minimize energy loss in Tokamaks?

Yes, researchers are constantly working on developing new techniques and technologies to minimize energy loss in Tokamaks. One approach is to use advanced materials that can withstand higher temperatures and magnetic fields, allowing for more efficient and stable confinement of the plasma. Additionally, new heating methods, such as microwaves and neutral beam injection, are being explored to increase the temperature and stability of the plasma. Ultimately, a combination of these and other techniques may be needed to achieve sustained fusion reactions in a Tokamak.

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