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← ScienceWhich outcome limits fusion power reactors' heat exhaust?
A)Tritium back-scattering increases linearly
B)Material sputtering increases exponentially✓
C)Magnetic field strength loses confinement
D)Neutron flux induces lattice dislocations
💡 Explanation
Material sputtering is a key limit because high-energy particles erode plasma-facing components via momentum transfer. This erosion rate exponentially increases with ion energy. These particles therefore contaminate the plasma, cooling it rather than contributing to fusion.
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