Published August 27, 2020
| Version v1
Publication
Experimental investigation of geodesic acoustic modes on JET using Doppler backscattering
Description
Geodesic acoustic modes (GAMs) have been investigated in JET ohmic discharges using
mainly Doppler backscattering. Characteristics and scaling properties of the GAM are studied.
Time and spatial resolved measurements of the perpendicular velocity indicate that GAMs are
located in a narrow layer at the edge density gradient region with amplitude corresponding
to about 50% of the mean local perpendicular velocity. GAMs on JET appear to be regulated
by the turbulence drive rather than by their damping rate. It is also shown that the GAM
amplitude is ~20% larger in deuterium than in hydrogen plasmas.
Abstract
EURATOM 633053Abstract
Fundação para a Ciência e Tecnologia UID/FIS/50010/2013Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/100496
- URN
- urn:oai:idus.us.es:11441/100496