Thermomagnetic instability in a magnetized plasma
Thermomagnetic instability in a magnetized plasma
复制标题
磁化等离子体中的热磁不稳定性
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
H. Strauss
中科院分区：
文献类型：
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作者：
A. Fruchtman;H. Strauss
研究了由等离子体密度梯度和温度梯度驱动的热磁不稳定性，等离子体密度梯度和温度梯度相互平行且与磁场正交。本文研究磁化等离子体中电子回旋频率大于电子碰撞频率的情况。磁化等离子体中横向导热性的性质导致不稳定性由相反的密度和温度梯度驱动。磁化等离子体中的生长速率比未磁化等离子体中的生长速率小得多。在非常强的磁场中，热对流大于热传导，并且霍尔场进一步稳定了不稳定性。
The thermomagnetic instability, driven by gradients of the plasma density and temperature, which are parallel to each other and orthogonal to the magnetic field, is studied. The focus of this paper is on a magnetized plasma, in which the electron cyclotron frequency is larger than the electron collision frequency. The nature of the transverse heat conductivity in the magnetized plasma causes the instability to be driven by opposite density and temperature gradients. The growth rate in the magnetized plasma is much smaller than in the unmagnetized plasma. In a very strong magnetic field heat convection is larger than heat conduction, and the instability is further stabilized by the Hall field.