Temperature Equilibration due to Charge State Fluctuations in Dense Plasmas.
Temperature Equilibration due to Charge State Fluctuations in Dense Plasmas.
复制标题
致密等离子体中电荷态波动导致的温度平衡。
DOI：
10.1103/physrevlett.127.035002
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发表时间：
2021
影响因子：
8.6
通讯作者：
Baggott RA
中科院分区：
文献类型：
--
作者：
Baggott RA
稠密等离子体中离子的电荷态由于碰撞电离和复合而发生波动。在这里，我们展示了如何通过修改离子相互作用势，这些波动可以调解等离子体电子和离子之间的能量交换。此外，我们发展了一种新的电子-离子能量转移机制的理论。使用随机游走方法的波动的计算表明，从电荷状态波动的能量交换率可以直接电子-离子碰撞。然而，这种机制，预测表现出复杂的依赖于等离子体的温度和电离状态，这可能有助于我们理解的显着变化的平衡时间的实验测量。
The charge states of ions in dense plasmas fluctuate due to collisional ionization and recombination. Here, we show how, by modifying the ion interaction potential, these fluctuations can mediate energy exchange between the plasma electrons and ions. Moreover, we develop a theory for this novel electron-ion energy transfer mechanism. Calculations using a random walk approach for the fluctuations suggest that the energy exchange rate from charge state fluctuations could be comparable to direct electron-ion collisions. This mechanism is, however, predicted to exhibit a complex dependence on the temperature and ionization state of the plasma, which could contribute to our understanding of significant variation in experimental measurements of equilibration times.