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← ScienceWhich limit applies when deuterium-tritium fusion in a tokamak is increased?
A)Plasma undergoes radiative collapse quickly✓
B)Vacuum chamber undergoes helium embrittlement
C)Superconducting magnets suffer resistive quenching
D)Tritium breeding ratio declines notably
💡 Explanation
The plasma undergoes radiative collapse at high densities because increased electron-ion collisions enhance bremsstrahlung radiation via the bremsstrahlung mechanism. Therefore, the increased radiation cools the plasma edge, rather than sustaining required temperatures for fusion.
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