Measurement of the flow velocity in unmagnetized plasmas by counter propagating ion-acoustic waves

被引：16

作者：

Ma, JX ^{[1
]}

Li, YF ^{[1
]}

Xiao, DL ^{[1
]}

Li, JJ ^{[1
]}

Li, YR ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, CAS Key Lab Basic Plasma Phys, Hefei 230026, Anhui, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2005年 / 76卷 / 06期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

D O I：

10.1063/1.1924651

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The diffusion velocity of an inhomogeneous unmagnetized plasma is measured by means of the phase velocities of ion-acoustic waves propagating along and against the direction of the plasma flow. Combined with the measurement of the plasma density distributions by usual Langmuir probes, the method is applied to measure the ambipolar diffusion coefficient and effective ion collision frequency in inhomogeneous plasmas formed in an asymmetrically discharged double-plasma device. Experimental results show that the measured flow velocities, diffusion coefficients, and effective collision frequencies are in agreement with ion-neutral collision dominated diffusion theory. (c) 2005 American Institute of Physics.

引用

页数：5

共 20 条

[1] ELECTRON-IMPACT IONIZATION OF ATOMS, MOLECULES, IONS AND TRANSIENT SPECIES [J].