A reduced coupled-mode description for the electron-ion energy relaxation in dense matter
A reduced coupled-mode description for the electron-ion energy relaxation in dense matter
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DOI：
10.1209/0295-5075/83/15002
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发表时间：
2008-01-01
期刊：
影响因子：
1.8
通讯作者：
Gericke, D. O.
中科院分区：
文献类型：
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作者：
Gregori, G.;Gericke, D. O.
我们提出了致密双温系统中电子-离子能量弛豫的简化模型，其中包括耦合集体模式的影响。它还将标准 Spitzer 结果扩展到简并系统和强耦合系统。从一般的耦合模式描述开始，我们能够解析解决热致密物质和强耦合等离子体中的温度弛豫时间。这是通过解耦电子-离子动力学并用模式频率表示离子响应来实现的。所提出的简化模型可以快速描述流体动力学模拟中的温度平衡，并可以轻松比较实验研究。对于热致密物质（无论是流体还是固体），该模型给出的电子-离子平衡速度比经典斯皮策结果预测的要慢。版权所有 (c) EPLA，2008。
We present a simplified model for the electron-ion energy relaxation in dense two-temperature systems that includes the effects of coupled collective modes. It also extends the standard Spitzer result to both degenerate and strongly coupled systems. Starting from the general coupled-mode description, we are able to solve analytically for the temperature relaxation time in warm dense matter and strongly coupled plasmas. This was achieved by decoupling the electron-ion dynamics and by representing the ion response in terms of the mode frequencies. The presented reduced model allows for a fast description of temperature equilibration within hydrodynamic simulations and an easy comparison for experimental investigations. For warm dense matter, both fluid and solid, the model gives a slower electron-ion equilibration than predicted by the classical Spitzer result. Copyright (c) EPLA, 2008.