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Scaling of H-Mode Pedestal and ELM Characteristics in the JET and DIII-D Tokamaks
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-9546-4494
Number of Authors: 34
2010 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The dependence of the H-mode edge pedestal width and Type I edge localized mode (ELM) characteristics on ion gyro-radius, ρ*=ρ/a, was studied in experiments combining data from the JET and DIII-D tokamaks to achieve a factor of 4 variation in ρ* [M.N.A. Beurskens, et al., Plasma Phys. Control. Fusion (2010)]. No change was found in the radial or poloidal correlation lengths of density fluctuations in the ETB as a function of ρ*. The ELM energy loss normalized to the pedestal energy increased with ρ* on DIII-D to twice the value expected from an established scaling with collisionality; however, this trend was reversed on JET where the ΔWELM/WPED instead decreased weakly with increasing ρ*. The ELM size was also correlated with the proximity of the density to the value at which the power for transition from L- to H-mode is a minimum.

Place, publisher, year, edition, pages
IAEA , 2010. EXC/2-1- p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-55839OAI: oai:DiVA.org:kth-55839DiVA: diva2:471856
Conference
23rd IAEA Fusion Energy Conference, Daejon, Korea Rep. of, October 11-16, 2010
Note
QC 20120103. Author count: 34 Available from: 2012-01-03 Created: 2012-01-03 Last updated: 2012-01-09Bibliographically approved

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http://www-pub.iaea.org/mtcd/meetings/PDFplus/2010/cn180/cn180_papers/exc_2-1.pdf

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Frassinetti, Lorenzo

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