Physics – 1.7.3 Energy resources | e-Consult
1.7.3 Energy resources (1 questions)
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Two main methods for containing plasma in a fusion reactor are magnetic confinement and inertial confinement.
Magnetic Confinement (e.g., Tokamak):
- Principle: A strong magnetic field is used to confine the plasma, preventing it from touching the reactor walls. Charged particles within the plasma are forced to spiral along the magnetic field lines, limiting their movement and preventing them from escaping.
- Advantage: Can achieve relatively long confinement times, allowing for sustained fusion reactions.
- Disadvantage: Requires extremely powerful and complex magnetic fields, which are expensive and technically challenging to maintain.
Inertial Confinement (e.g., Laser Fusion):
- Principle: A small pellet of fusion fuel is rapidly compressed and heated by powerful lasers. The inertia of the fuel prevents it from expanding, causing it to reach extremely high temperatures and densities, triggering fusion.
- Advantage: Potentially simpler reactor design compared to magnetic confinement.
- Disadvantage: Achieving the necessary uniformity and stability of compression and heating is very difficult, leading to lower fusion yields and potential damage to the reactor.