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Overview of transport and MHD stability study: focusing on the impact of magnetic field topology in the Large Helical Device
- Source :
- K. Ida et al 2015 Nucl. Fusion 55 104018, Nuclear Fusion
- Publication Year :
- 2015
- Publisher :
- IOP Publishing, 2015.
-
Abstract
- The progress in the understanding of the physics and the concurrent parameter extension in the large helical device since the last IAEA-FEC, in 2012 (Kaneko O et al 2013 Nucl. Fusion 53 095024), is reviewed. Plasma with high ion and electron temperatures (Ti(0) ~ Te(0) ~ 6 keV) with simultaneous ion and electron internal transport barriers is obtained by controlling recycling and heating deposition. A sign flip of the nondiffusive term of impurity/momentum transport (residual stress and convection flow) is observed, which is associated with the formation of a transport barrier. The impact of the topology of three-dimensional magnetic fields (stochastic magnetic fields and magnetic islands) on heat momentum, particle/impurity transport and magnetohydrodynamic stability is also discussed. In the steady state operation, a 48 min discharge with a line-averaged electron density of 1 × 1019 m−3 and with high electron and ion temperatures (Ti(0) ~ Te(0) ~ 2 keV), resulting in 3.36 GJ of input energy, is achieved.
- Subjects :
- Nuclear and High Energy Physics
Electron density
topology
Materials science
Plasma
Electron
Condensed Matter Physics
Topology
7. Clean energy
01 natural sciences
010305 fluids & plasmas
Ion
Magnetic field
Momentum
Large Helical Device
transport
0103 physical sciences
Atomic physics
Magnetohydrodynamics
010306 general physics
helical
Subjects
Details
- ISSN :
- 17414326, 00295515, 07413335, and 13672630
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Nuclear Fusion
- Accession number :
- edsair.doi.dedup.....6f520d92e99eee215eb08dc541de49ff