• Tokamaks show asymmetric particle loss, with inner divertor receiving far more plasma than outer. • Excess inner divertor hits cause increased erosion, limiting reactor lifespan. • Researchers simulate plasma rotation to predict and balance particle fluxes. • Adjusting magnetic field geometry could equalize inner‑outer divertor loads. • Improved divertor design may extend fusion reactor operation by decades. • Findings guide next‑generation tokamak prototypes toward sustainable energy production.
Article Summaries:
- Scientists have long seen a puzzling pattern in tokamaks, the doughnut-shaped machines that could one day reliably generate electricity from fusing atoms. When plasma particles escape the core of the magnetic fields that hold the plasma in its doughnut shape, they stream down toward the exhaust system, known as the divertor. There, plasma particles strike metal plates, cool down and bounce back. (The returning atoms help fuel the fusion reaction.) But experiments consistently show that far more particles hit the inner divertor target than the outer one.
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