Multidirectional plasma flow measurement by Gundestrup Probe in scrape-off layer of ADITYA tokamak

Multidirectional plasma flow measurements by using Gundestrup Probe in the scrape-off layer of ADITYA tokamak are presented. The ADITYA Gundestrup Probe-head consists of eight plates arranged around the ceramic rod and three pins normal to side plates. Plates are used to measure both parallel and pe...

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Bibliographic Details
Published in:Physics of plasmas 2015-11, Vol.22 (11)
Main Authors: Sangwan, Deepak, Jha, Ratneshwar, Tanna, Rakesh L.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ADITYA TOKAMAK
CERAMICS
Flow measurement
MACH NUMBER
Parallel flow
PLASMA DENSITY
Plasma physics
PLASMA SCRAPE-OFF LAYER
PLATES
POTENTIALS
PROBES
RODS
Tokamak devices
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Summary:Multidirectional plasma flow measurements by using Gundestrup Probe in the scrape-off layer of ADITYA tokamak are presented. The ADITYA Gundestrup Probe-head consists of eight plates arranged around the ceramic rod and three pins normal to side plates. Plates are used to measure both parallel and perpendicular flows simultaneously and pins are used to measure plasma density and floating potential. A comparison of direct perpendicular flow measurement and by two other plates of Gundestrup Probe is presented. Possible causes of perpendicular flows are identified and compared with the measured flows. It is observed that the mechanism of the parallel flow and the perpendicular flow is different only at high parallel Mach number. A puff of the working gas is used to study its effect on the perpendicular flows and its reversal with the gas puff is observed.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4935292