Back to Search
Start Over
Pedestal structure, stability and scalings in JET-ILW: the EUROfusion JET-ILW pedestal database
- Source :
- Nuclear Fusion, NUCLEAR FUSION
- Publication Year :
- 2021
-
Abstract
- The EUROfusion JET-ILW pedestal database is described, with emphasis on three main issues. First, the technical aspects are introduced, including a description of the data selection, the datasets, the diagnostics used, the experimental and theoretical methods implemented and the main definitions. Second, the JET-ILW pedestal structure and stability are described. In particular, the work describes the links between the engineering parameters (power, gas and divertor configuration) and the disagreement with the peeling-ballooning (PB) model implemented with ideal magnetohydrodynamics equations. Specifically, the work clarifies why the JET-ILW pedestal tends to be far from the PB boundary at high gas and high power, showing that a universal threshold in power and gas cannot be found but that the relative shift (the distance between the position of the pedestal density and of the pedestal temperature) plays a key role. These links are then used to achieve an empirical explanation of the behavior of the JET-ILW pedestal pressure with gas, power and divertor configuration. Third, the pedestal database is used to revise the scaling law of the pedestal stored energy. The work shows a reasonable agreement with the earlier Cordey scaling in terms of plasma current and triangularity dependence, but highlights some differences in terms of power and isotope mass dependence.
- Subjects :
- Nuclear and High Energy Physics
Physics::Instrumentation and Detectors
GLOBAL CONFINEMENT
ELMY H-MODES
pedestal scaling
01 natural sciences
Stability (probability)
010305 fluids & plasmas
ENERGY
Pedestal
DENSITY LIMIT
Physics::Plasma Physics
DEPENDENCE
0103 physical sciences
010306 general physics
EDGE LOCALIZED MODES
Physics
Jet (fluid)
Mechanics
pedestal structure
Condensed Matter Physics
TRANSPORT
Physics and Astronomy
SIMULATION
PB stability
2-TERM MODEL
PARTICLE LOSSES
Subjects
Details
- ISSN :
- 00295515, 17414326, 07413335, and 17426596
- Database :
- OpenAIRE
- Journal :
- Nuclear Fusion
- Accession number :
- edsair.doi.dedup.....9cd4d00ad65771a4036bbbf93b39d503
- Full Text :
- https://doi.org/10.1088/1741-4326/abb79e