Polarized Debye Sheath in Degenerate Plasmas

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2019,（11）
• 页码范围: 1341-1345
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0253-6102/71/11/1341

摘要

The force on a charged dust grain in a plasma due to polarization of thermal ions and degenerate electrons around the grain is derived in the limits of weakly relativistic and ultra-relativistic degeneracy of electrons.It is found that in both these cases,the magnitude of the polarization force is enhanced compared to that in classical plasmas.The influence of this force on dust-acoustic (DA) modes is examined and discussed.It is shown that the DA wave frequency in degenerate plasmas is significantly reduced compared to the classical DA mode.