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← ScienceWhich outcome occurs when inert helium's concentration increases in a tokamak reactor?
A)Plasma confinement time significantly degrades✓
B)Duty cycle and thermal output improves
C)Tritium breeding ratio sharply increases
D)Neutron flux experienced reduces notably
💡 Explanation
Increased helium levels leads to radiative losses; therefore, plasma confinement degrades because bremsstrahlung radiation increases via Coulomb collisions of helium nuclei with charged particles in the high-energy plasma, rather than improved performance or flux changes arising from fusion.
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