May 2009

Conference Paper

Biased Electrodes for SOL Control in NSTX

By:
Zweben, S.; Maqueda, R. J.; Roqemore, A. L.; Bush, Charles ; Kaita, R.; Marsala, R.; Raitses, Y; Cohen, Ronald; Ryutov, D
Journal Name:
Journal of Nuclear Materials
Page Number:
417-420
Volume:
390-91
Issue Number:
N/A
Publication Date:
May 2009
Conference Name:
18th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices
Conference Location:
Toledo, Spain
Conference Sponsor:
Spanish Natl Fus Lab; Spanish Minist Sci & Innovat
View DOI Listing:
https://doi.org/10.1016/j.jnucmat.2009.01.106

Abstract

Small electrodes were installed in the outer-midplane edge of NSTX to attempt to control the local width of the scrape-off layer (SOL) by creating an outward E(pol)xB flow. When the applied voltage between electrodes was 90 V, the density between these electrodes increased by a factor of 3-10 over a radial width of similar to 4 cm. Thus a local control of the SOL plasma density was obtained. (C) 2009 Elsevier B.V. All rights reserved.