悬浮在等离子体鞘层中的相同粒子的垂直配对。
Vertical pairing of identical particles suspended in the plasma sheath.
作者信息
Steinberg V, Sütterlin R, Ivlev A V, Morfill G
机构信息
Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
出版信息
Phys Rev Lett. 2001 May 14;86(20):4540-3. doi: 10.1103/PhysRevLett.86.4540.
It is shown experimentally that vertical pairing of two identical microspheres suspended in the sheath of a radio-frequency (rf) discharge at low gas pressures (a few Pa) appears at a well-defined instability threshold of the rf power. The transition is reversible, but with significant hysteresis on the second stage. A simple model which uses measured microsphere resonance frequencies and takes into account, in addition to the Coulomb interaction between negatively charged microspheres, their interaction with positive-ion-wake charges, seems to explain the instability threshold quite well.
实验表明，在低气压（几帕斯卡）下，悬浮在射频（rf）放电鞘层中的两个相同微球的垂直配对出现在明确的射频功率不稳定阈值处。这种转变是可逆的，但在第二阶段有明显的滞后现象。一个简单的模型，除了考虑带负电微球之间的库仑相互作用外，还考虑了它们与正离子尾流电荷的相互作用，并使用测量的微球共振频率，似乎能很好地解释不稳定阈值。
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