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research article

Validation of short-pulse reflectometry turbulence measurements with a synthetic diagnostic

Krutkin, Oleg  
•
Kumar, Umesh  
•
Mazzi, S.
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February 1, 2024
Nuclear Fusion

Experimental measurements of the turbulence amplitude utilizing a short pulse reflectometry method are presented. Two discharges with shaped plasma possessing opposite signs of triangularity are considered and a higher turbulence amplitude is found in the positive triangularity case. To confirm this result, a synthetic short pulse reflectometry diagnostic is developed. Local gyrokinetic modeling with the GENE code is carried out to produce turbulence relevant to the experimental conditions. This turbulence is then used as an input for the full-wave CUWA code to produce synthetic short pulse reflectometry signals. By matching synthetic and experimental reflectometry data, the difference between turbulence amplitudes in the two cases is confirmed. Additionally, the capability of the diagnostic to also measure the frequency spectrum of the turbulence is demonstrated.

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Type
research article
DOI
10.1088/1741-4326/ad15b1
Web of Science ID

WOS:001135875900001

Author(s)
Krutkin, Oleg  
Kumar, Umesh  
Mazzi, S.
Brunner, S.  
Coda, S  
Rienaecker, S.
Van Rossem, Mackenzie Peter-Fulford  
Corporate authors
TCV Team
Date Issued

2024-02-01

Publisher

IOP Publishing Ltd

Published in
Nuclear Fusion
Volume

64

Issue

2

Article Number

026010

Subjects

Physical Sciences

•

Turbulence

•

Reflectometry

•

Full-Wave Modeling

•

Negative Triangularity

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
FunderGrant Number

EUROfusionhttp://dx.doi.org/10.13039/100019784

101052200

European Union via the Euratom Research and Training Programme

Swiss State Secretariat for Education, Research and Innovation (SERI)

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Available on Infoscience
February 20, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/204885
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