Attractive potential around a thermionically emitting microparticle

被引：86

作者：

Delzanno, GL ^{[1
]}

Lapenta, G

Rosenberg, M

机构：

[1] Politecn Torino, INFM, Turin, Italy

[2] Politecn Torino, Dipartimento Energet, Burning Plasma Res Grp, Turin, Italy

[3] Los Alamos Natl Lab, Div Theoret, Plasma Theory Grp, Los Alamos, NM 87545 USA

[4] Univ San Diego, Dept Phys, San Diego, CA 92110 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.92.035002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a simulation study of the charging of a dust grain immersed in a plasma, considering the effect of thermionic electron emission from the grain. It is shown that the orbit motion limited theory is no longer reliable when electron emission becomes large: screening can no longer be treated within the Debye-Huckel approach and an attractive potential well can form, leading to the possibility of attractive forces on other grains with the same polarity. We suggest to perform laboratory experiments where emitting dust grains could be used to create nonconventional dust crystals or macromolecules.

引用

页数：4

共 11 条

[1]

BIRDSALL CK, 1991, PLASMA PHYSICS VIA C, P405

[2] SHEATH STRUCTURE AROUND PARTICLES IN LOW-PRESSURE DISCHARGES [J].