Visualization of density structures in tokamak edge plasmas using lithium beam fluorescence

Author

Thomas, D.M.

Author_Institution

Gen. Atomics, San Diego, CA, USA

Volume

24

Issue

1

fYear

1996

fDate

2/1/1996 12:00:00 AM

Firstpage

27

Lastpage

28

Abstract

To study the local behavior of the edge plasma density in the DIII-D tokamak, we image the collisionally induced fluorescence from an injected neutral lithium beam using a gated intensified charge-coupled device (CCD) camera coupled to a UNIX workstation. The goal of these experiments is to search for spatially coherent structures in the plasma edge density which may be transiently illuminated by the beam. In our imaging studies to date we have been able to follow the evolution of the edge density as the main plasma discharge progresses through various confinement states under intense neutral beam injection (NBI) heating

Keywords

fluorescence; plasma beam injection heating; plasma boundary layers; plasma confinement; plasma density; plasma diagnostics; plasma toroidal confinement; DIII-D tokamak; Li beam fluorescence; UNIX workstation; collisionally induced fluorescence imaging; density structures visualisation; discharge; edge plasma density; gated intensified charge-coupled device camera; injected neutral Li beam; neutral beam injection heating; spatially coherent structures; Charge coupled devices; Fluorescence; Lithium; Particle beam injection; Particle beams; Plasma confinement; Plasma density; Plasma devices; Tokamaks; Visualization;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.491674

Filename

491674