Gurevich E L, Liehr A W, Amiranashvili Sh, Purwins H-G
Institut für Angewandte Physik, Corrensstrasse 2/4, D-48149 Muenster, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Mar;69(3 Pt 2):036211. doi: 10.1103/PhysRevE.69.036211. Epub 2004 Mar 31.
Surface charge of the electrodes is investigated for planar dc gas-discharge systems. Both analytical estimates and experimental data show that such a charge plays an important role for the dc systems with a high-ohmic electrode. This is demonstrated by several experiments concerning discharge establishment and pattern formation phenomena. The surface charge has an inhibitory role, as it diminishes the electric field in the gas. Due to the low mobility of the surface charges, their distribution can be nonuniform giving rise to the observable filamentary structure of the discharge. It is also shown that the surface charge effect can be naturally incorporated in existing phenomenological models of the planar discharge. Thereby one can explain several observable phenomena, such as stability, multiplicity, and motion of the localized structures.
针对平面直流气体放电系统，研究了电极的表面电荷。分析估计和实验数据均表明，这种电荷对于具有高欧姆电极的直流系统起着重要作用。关于放电建立和图案形成现象的几个实验证明了这一点。表面电荷具有抑制作用，因为它会削弱气体中的电场。由于表面电荷的迁移率低，它们的分布可能不均匀，从而产生可观测到的放电丝状结构。还表明，表面电荷效应可以自然地纳入现有的平面放电唯象模型中。由此可以解释一些可观测到的现象，如局部结构的稳定性、多重性和运动。
