Two-color Mie-scattering images of uncorrelated and correlated trapped dust in low-frequency helium discharges

Author

Ganguly, B.N. ; Haaland, P.d. ; Bletzinger, P. ; Garscadden, A.

Author_Institution

Air Force Res. Lab., Wright-Patterson AFB, OH, USA

Volume

30

Issue

1

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

90

Lastpage

91

Abstract

Simultaneous two-color Mie scattering images from the particle size dependent self-assembled trapped dust particles in a low-frequency helium discharge have been measured. The dynamics of the dust ensemble during the discharge switch-off suggests that the long range order in a correlated dust phase can reduce the ion-ion and the electron-ion recombination rates on dust surface by several orders of magnitudes compared to the ambipolar or to free diffusion rates

Keywords

dusty plasmas; helium; light scattering; optical images; plasma diagnostics; ambipolar diffusion rates; correlated dust phase; correlated trapped dust; discharge switch-off; dust ensemble dynamics; dust surface; electron-ion recombination rates; free diffusion rates; ion-ion recombination rates; laser light scattering; long range order; low-frequency helium discharge; low-frequency helium discharges; particle size dependent self-assembled trapped dust particles; self-assembled complex; simultaneous two-color Mie scattering images; uncorrelated trapped dust; Electrodes; Frequency; Helium; Laboratories; Laser beams; Light scattering; Mie scattering; Particle measurements; Particle scattering; Size measurement;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2002.1003938

Filename

1003938