Stability of negative ionization fronts:: Regularization by electric screening? -: art. no. 036214

被引:28
作者
Arrayás, M
Ebert, U
机构
[1] Univ Rey Juan Carlos, Dept Fis, Madrid 28933, Spain
[2] CWI, NL-1090 GB Amsterdam, Netherlands
[3] Eindhoven Univ Technol, Dept Phys, NL-5600 MB Eindhoven, Netherlands
来源
PHYSICAL REVIEW E | 2004年 / 69卷 / 03期
关键词
D O I
10.1103/PhysRevE.69.036214
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We recently have proposed that a reduced interfacial model for streamer propagation is able to explain spontaneous branching. Such models require regularization. In the present paper we investigate how transversal Fourier modes of a planar ionization front are regularized by the electric screening length. For a fixed value of the electric field ahead of the front we calculate the dispersion relation numerically. These results guide the derivation of analytical asymptotes for arbitrary fields: for small wave-vector k, the growth rate s(k) grows linearly with k, for large k, it saturates at some positive plateau value. We give a physical interpretation of these results.
引用
收藏
页码:036214 / 1
页数:10
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