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← ScienceWhich outcome results when an ion source accumulates heavier isotopes?
A)Decreased ion beam energy dispersion✓
B)Increased ion beam space charge
C)Enhanced plasma sheath formation
D)Reduced charge state distribution width
💡 Explanation
Decreased ion beam energy dispersion results from heavier isotope accumulation because the increased mass contributes to a narrower velocity distribution under a constant kinetic energy constraint; therefore, energy dispersion decreases, rather than increased space charge or sheath adjustments, because velocity impacts beam parameters.
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