2011
DOI: 10.1002/ctpp.201000109
|View full text |Cite
|
Sign up to set email alerts
|

Influence of Negative Ions on Drift Waves in a Low‐Density Ar/O2‐Plasma

Abstract: The effect of negative ions on the drift wave instability has been studied in detail in a linear device by means of Langmuir probes and cross-correlation analysis. Drift waves are excited in low-density (5 × 10 14 m −3 ) and strongly magnetized (0.5 T) pure argon plasmas and in the presence of an oxygen admixture. The radial density profile of negative ions is hollow. For increasing concentration of negative ions the wave frequency decreases by about 25%. Despite of an axial density gradient, a global wave fre… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

0
6
0

Year Published

2013
2013
2024
2024

Publication Types

Select...
6
1

Relationship

0
7

Authors

Journals

citations
Cited by 17 publications
(6 citation statements)
references
References 41 publications
0
6
0
Order By: Relevance
“…were produced (P∼10 −5 Torr), the typical square wavetype potential profile was transformed into a triangular wave-type profile, with the potential shifting to more positive values in the plasma. The shape of the profile (negative peak in the center) is a possible indication that the negative ions were primarily located near the outside of the plasma column, as observed by Knist et al (2011).…”
Section: Resultsmentioning
confidence: 81%
See 1 more Smart Citation
“…were produced (P∼10 −5 Torr), the typical square wavetype potential profile was transformed into a triangular wave-type profile, with the potential shifting to more positive values in the plasma. The shape of the profile (negative peak in the center) is a possible indication that the negative ions were primarily located near the outside of the plasma column, as observed by Knist et al (2011).…”
Section: Resultsmentioning
confidence: 81%
“…A local kinetic theory of drift instability in a positive ion-negative ion plasma, including weak collisional effects, was presented by Rosenberg and Merlino (2013). The effect of negative ions on drift waves in an Ar/O 2 plasma has also been studied recently by Knist et al (2011). Their experiments were performed in an RF-produced plasma at neutral pressures ∼0.75-7.5 mTorr and T e 100 T + .…”
Section: Introductionmentioning
confidence: 99%
“…Shukla et al 1991;Rosenberg and Krall 1996;Shukla and Rosenberg 2009;Saleem 2010;Knist et al 2011). However, the only theory that we have found for a negative ion plasma with vanishingly small electron concentration appears to be for a pair-ion plasma in which there is no mass difference between the ion species (e.g., Saleem 2010).…”
Section: Introductionmentioning
confidence: 92%
“…Solitary wave polarity reversal (i.e., generation of rarefactive, rather than compressive excitations) in a negative ion-beam permeated plasma was observed in the laboratory, by means of a double plasma device [30]. In an similar study, the impact of negative ions on drift wave propagation was investigated by means of the DUST-WHEEL experiment in Kiel [31], where the negative ion density was shown to affect the dispersion characteristics and the stability profile of drift waves. The influence of negative ions on drift ion wave instability in a weakly collisional magnetized plasma was investigated by using linear kinetic theory in Ref.…”
Section: Introductionmentioning
confidence: 99%