Fluctuations in the edge region of the tokamak stor-1m

Author

Johnson, H.J. ; Singh, A.K. ; Mukhopadhyay, S. ; Edwards, W.F. ; Bishop, J. ; Held, E.D.

Author_Institution

Utah State Univ., Logan, UT, USA

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

1

Abstract

Summary form only given. We report measurements of fluctuations in the edge region of a small tokamak (I_p ~ 5kA, B_T ~ 1T, R = 22cm, and a = 3.5cm) recently reassembled and in operation at Utah State University. The tokamak originally operated at the University of Saskatchewan, Saskatoon Canada. The fluctuations and the characteristics of the turbulence measured with electrostatic and magnetic probes will be presented. The presence of the Geodesic Acoustic Mode (GAM), which is a high frequency zonal flow, has been investigated in our tokamak plasma. This mode has no instabilities. The spatial structure of GAM in a poloidal plane will also be presented.

Keywords

Tokamak devices; plasma boundary layers; plasma diagnostics; plasma fluctuations; plasma magnetohydrodynamics; plasma turbulence; Canada; STOR-1M tokamak; Saskatoon; University of Saskatchewan; Utah State University; electrostatic probes; geodesic acoustic mode; high frequency zonal flow; magnetic probes; plasma turbulence; poloidal GAM structure; tokamak edge region fluctuations; Acoustic measurements; Electrostatic measurements; Fluctuations; Frequency; Level measurement; Plasma measurements; Plasma properties; Probes; Tokamaks; USA Councils;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science - Abstracts, 2009. ICOPS 2009. IEEE International Conference on

Conference_Location

San Diego, CA

ISSN

0730-9244

Print_ISBN

978-1-4244-2617-1

Type

conf

DOI

10.1109/PLASMA.2009.5227371

Filename

5227371