APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

15 May 2000

Volume 76, Issue 20, pp. 2815-2963

Return to All Sections
back to top
RSS Feeds

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

I. D. Kaganovich, B. N. Ramamurthi, and Demetre J. Economou

Appl. Phys. Lett. 76, 2844 (2000); http://dx.doi.org/10.1063/1.126492 (3 pages) | Cited 11 times

Full Text: Read Online (HTML) | Download PDF

Show Abstract
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 (γd) and diffusion time τd. If γdτd>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 γdτd<2. © 2000 American Institute of Physics.
Show PACS
52.80.Hc Glow; corona
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close