Yves Martin Yves Martin Centre de Recherches en Physique des Plasmas Association Euratom - Confédération Suisse Ecole Polytechnique Fédérale de Lausanne (EPFL) CH - 1015 Lausanne, Switzerland ITPA – CDBM ITPA – CDBM H-mode threshold database H-mode threshold database DB analysis DB analysis May 2007 - Lausanne May 2007 - Lausanne
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ITPA – CDBM H-mode threshold database DB analysis May 2007 - Lausanne
ITPA – CDBM H-mode threshold database DB analysis May 2007 - Lausanne. Yves Martin Centre de Recherches en Physique des Plasmas Association Euratom - Confédération Suisse Ecole Polytechnique Fédérale de Lausanne (EPFL) CH - 1015 Lausanne, Switzerland. Outline. n e and B t dependences - PowerPoint PPT Presentation
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Yves MartinYves Martin
Centre de Recherches en Physique des PlasmasAssociation Euratom - Confédération Suisse
Ecole Polytechnique Fédérale de Lausanne (EPFL)CH - 1015 Lausanne, Switzerland
ne and Bt dependences• Variation of ne and Bt dependences with tokamak size
Density at the minimum threshold powerDiscussion on other points in my message
• Scaling Refine scaling
• Access to 'good' confinement regime Minimum threshold power for type I ELMs Minimum threshold power for good confinement regime
• Influence of power fraction to electrons• 0D modelling of discharge evolution• Enough additional power during pulse evolution• Isotope identity pulses• List of parameters / actions to reduce the threshold power
Where should we put some effort ? (& some=?)• Threshold power (LH transition) understanding ?• Issue cards ?
Choose between topics:• Refine scaling (including n, B scalings)• Power ratio for good confinement• Influence of power fraction to electrons• 0D modelling of discharge evolution• Enough additional power during pulse evolution• Isotope identity pulses
Paper at IAEA TM H-mode• Recommended scaling• Density, field dependence of PLTH• Power ratio to access good confinement• Enough additional power during pulse evolution
Actions• New data NSTX, MAST, JFT2M, CHS ? Aspect ratio effect ?• Recommended scaling (done?)• Density dependence: 'negative' result from DB and/or individual
machine contributions ?• Power ratio: data from DBs, survey of litterature and/or input
from individual ?• Pulse evolution: identify scenarios, estimate n, B, P (a,R)