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  4. Development of a two-term model for the confinement in ELMy H-modes using the global confinement and pedestal databases
 
research article

Development of a two-term model for the confinement in ELMy H-modes using the global confinement and pedestal databases

Thomsen, K.
•
Cordey, J.G.
•
Martin, Y.  
2002
Plasma Phys. Control. Fusion

The overlap of pulses in the pedestal database and the global H-mode confinement database has been increased. This has resulted in a new improved combined dataset with core and pedestal energy data. Regression analysis of this dataset indicates that in ELMy H-mode the pedestal energy scales differently from the core energy and degrades strongly with plasma pressure β. Using these regression results to estimate the pedestal energy in the full ELMy dataset of the global H-mode confinement database, a new two-term scaling for ELMy H-mode confinement has been found that indicates that the core confinement scales as a pure gyro-Bohm scaling with no β degradation. At present, these findings are not conclusive as the dataset is limited in the range of data and has strong correlations between the plasma parameters.

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Type
research article
DOI
10.1088/0741-3335/44/5A/347
Author(s)
Thomsen, K.
Cordey, J.G.
Martin, Y.  
Corporate authors
The H-Mode Database Working Group
•
The Pedestal Database Working Group
Date Issued

2002

Published in
Plasma Phys. Control. Fusion
Volume

44

Start page

A429

End page

A435

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Available on Infoscience
April 16, 2008
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/21798
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