Self-trapping of negative ions due to electron detachment in the afterglow of electronegative gas plasmas

被引：17

作者：

Kaganovich, ID ^{[1
]}

Ramamurthi, BN ^{[1
]}

Economou, DJ ^{[1
]}

机构：

[1] Univ Houston, Dept Chem Engn, Plasma Proc Lab, Houston, TX 77204 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 20期

关键词：

D O I：

10.1063/1.126492

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The spatiotemporal evolution of charged species densities and wall fluxes during the afterglow of an electronegative discharge has been investigated. It was found that plasma decay crucially depends on the product of negative-ion-detachment frequency (gamma(d)) and diffusion time tau(d). If gamma(d)tau(d)> 2, negative ions convert to electrons during their diffusion towards the walls. The presence of detached electrons results in "self-trapping" of the negative ions, due to emerging electric fields, and the negative-ion flux to the walls is extremely small. Thus, negative ions can be extracted in the afterglow only if gamma(d)tau(d)< 2. (C) 2000 American Institute of Physics. [S0003-6951(00)00320-X].

引用

页码：2844 / 2846

页数：3

共 50 条

[31] Electron and negative ion dynamics in electronegative cc-rf plasmas [J].

Dittmann, K. ;

Kuellig, C. ;

Meichsner, J. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2012, 54 (12)

[32] Spatiotemporal dynamics of charged species in the afterglow of plasmas containing negative ions [J].

Kaganovich, ID ;

Ramamurthi, BN ;

Economou, DJ .

PHYSICAL REVIEW E, 2001, 64 (03) :12-364021

[33] Experimental verification of Boltzmann equilibrium for negative ions in weakly collisional electronegative plasmas [J].

Ghim , Young-chul ;

Hershkowitz, Noah .

APPLIED PHYSICS LETTERS, 2009, 94 (15)

[34] Threshold detachment of negative ions by electron impact [J].

Rost, JH .

PHYSICAL REVIEW LETTERS, 1999, 82 (08) :1652-1655

[35] Electron self-trapping in a discrete two-dimensional lattice [J].

Brizhik, L ;

Eremko, A ;

Piette, B ;

Zakrzewski, W .

PHYSICA D, 2001, 159 (1-2) :71-90

[36] Extrinsic self-trapping of an electron in quantum-well structures [J].

Shinozuka, Y .

ICDS-18 - PROCEEDINGS OF THE 18TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-4, 1995, 196- :403-407

[37] Electron acceleration based on self-trapping by plasma wake fields [J].

Suk, H .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (01) :487-491

[38] Electron Acceleration in the Relativistic Self-Trapping Regime of Extreme Light [J].

Bychenkov, V. Yu. ;

Lobok, M. G. .

BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE, 2023, 50 (SUPPL 6) :S706-S714

[39] Electron Acceleration in the Relativistic Self-Trapping Regime of Extreme Light [J].

V. Yu. Bychenkov ;

M. G. Lobok .

Bulletin of the Lebedev Physics Institute, 2023, 50 :S706-S714

[40] Extrinsic self-trapping of an electron in quantum-well structures [J].

Yamaguchi Univ, Ube, Japan .

Mater Sci Forum, pt 1 (403-408)

← 1 2 3 4 5 →