yhdyntäkatko

Yhdintäkatko refers to a situation in nuclear fusion research where the plasma within a fusion device unexpectedly cools down and loses its confinement, leading to a cessation of the fusion reaction. This phenomenon is a significant challenge in the development of controlled nuclear fusion as an energy source.

The primary cause of yhdintäkatko is often the rapid influx of impurities into the hot plasma core. These impurities, typically heavier elements, absorb energy from the plasma through radiation, effectively cooling it down. As the plasma cools, its pressure decreases, weakening its ability to be contained by magnetic fields or inertia. This loss of confinement allows more impurities to enter, creating a feedback loop that quickly extinguishes the fusion reaction.

Various factors can lead to the introduction of impurities, including disruptions in the magnetic confinement system, erosion of the reactor walls, or issues with fuel injection. Understanding and preventing yhdintäkatko is crucial for achieving sustained fusion. Researchers employ strategies such as improved plasma control systems, the use of low-Z materials for reactor walls, and advanced impurity mitigation techniques to maintain the stability and temperature of the plasma for longer durations. Successful mitigation of yhdintäkatko is a key step towards realizing practical fusion power.