scholarly journals The effect of the edge current density on confinement and kink mode stability in H-mode and VH-mode discharges

1994 ◽  
Author(s):  
J.R. Ferron ◽  
L.L. Lao ◽  
T.H. Osborne ◽  
E.J. Strait ◽  
T.S. Taylor ◽  
...  
Keyword(s):  
Current Density ◽  
Kink Mode ◽  
Edge Current ◽  
Mode Stability

scholarly journals Lower-hybrid counter current drive for edge current density modification in DIII-D

1994 ◽  
Author(s):  
M. E. Fenstermacher ◽  
W. M. Nevins ◽  
M. Porkolab ◽  
P. T. Bonoli ◽  
R. W. Harvey
Keyword(s):  
Current Density ◽  
Current Drive ◽  
Lower Hybrid ◽  
Edge Current ◽  
Counter Current

Bifurcated Tokamak equilibria with vanishing edge current density

1990 ◽  
Vol 143 (8) ◽  
pp. 393-399 ◽  
Author(s):  
E Lazzaro ◽  
S.V Shchepetov
Keyword(s):  
Current Density ◽  
Edge Current

scholarly journals Inter-ELM evolution of the edge current density in JET-ILW type I ELMy H-mode plasmas

2018 ◽  
Vol 60 (8) ◽  
pp. 085003 ◽  
Author(s):  
L Horvath ◽  
C F Maggi ◽  
F J Casson ◽  
V Parail ◽  
L Frassinetti ◽  
...  
Keyword(s):  
Current Density ◽  
Type I ◽  
Edge Current

scholarly journals DISTRIBUTION OF EQUILIBRIUM EDGE CURRENTS

2003 ◽  
Vol 02 (06) ◽  
pp. 611-617
Author(s):  
M. V. ENTIN ◽  
L. I. MAGARILL ◽  
M. M. MAHMOODIAN
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Current Density ◽  
Landau Levels ◽  
Quantum Limit ◽  
Additional Component ◽  
Edge Current ◽  
2D System ◽  
Quantizing Magnetic Field ◽  
Normal Magnetic Field

The distribution of equilibrium edge current density in 2D system subjected to a strong (quantizing) magnetic field has been studied. The case of half plane in normal magnetic field has been considered. The transition from classical strong magnetic field to ultra-quantum limit has been investigated. We have shown that the edge current density oscillates and decays with distance from the edge. The oscillations have been attributed to the Fermi wavelength of electrons. The additional component of the current smoothly depending on the distance but sensitive to the occupation of Landau levels has been found. The temperature suppression of oscillations has been studied.

scholarly journals Prospects for edge current density determination using LIBEAM on DIII-D

2001 ◽  
Vol 72 (1) ◽  
pp. 1023-1027 ◽  
Author(s):  
D. M. Thomas ◽  
A. S. Bozek ◽  
J. I. Robinson ◽  
K. H. Burrell ◽  
T. N. Carlstrom ◽  
...  
Keyword(s):  
Current Density ◽  
Density Determination ◽  
Edge Current

Zeeman polarimetry measurement for edge current density determination using Li-beam probe on JT-60U

2010 ◽  
Vol 81 (3) ◽  
pp. 033502 ◽  
Author(s):  
K. Kamiya ◽  
T. Fujita ◽  
A. Kojima ◽  
H. Kubo
Keyword(s):  
Current Density ◽  
Density Determination ◽  
Edge Current

scholarly journals Design of the Synthetic Aperture Microwave Imager Upgrade for measurement of the edge current density on MAST-U

2019 ◽  
Vol 203 ◽  
pp. 03004
Author(s):  
J.O. Allen ◽  
C. H. Vincent ◽  
R. G. L. Vann
Keyword(s):  
Current Density ◽  
Pitch Angle ◽  
Production Quality ◽  
Field Vector ◽  
Edge Plasma ◽  
Synthetic Aperture ◽  
Fourfold Increase ◽  
High Data ◽  
Edge Current ◽  
Microwave Imager

The Synthetic Aperture Microwave Imager (SAMI) has demonstrated the feasibility of 2D Doppler backscattering for measurement of the edge magnetic pitch angle on MAST and NSTX-U. The aim of SAMI-Upgrade (SAMI-U) is to build on this methodology to produce higher quality pitch angle data simultaneously in multiple spatial locations, enabling calculation of the edge current density. This movement from proof of principle to production quality necessitates several alterations to the design. There will be a fourfold increase in the number of antennas, as minimising the sidelobe level is key to ensuring maximum resolution in the reconstructed Doppler backscattered power map. SAMI-U will actively probe the plasma with two frequencies at the same time. These correspond to two different backscattering locations in the edge plasma which allows the edge current density to be calculated from the measured magnetic field vector. Dual-polarised sinuous antennas will be used in the array as they are planar and broadband. Polarisation separation is necessary for differentiation between the O-and X-mode cut off surfaces, as their locations can be separated by up to a few centimetres. Due to spatial constraints many of the components will be placed on a PCB behind each antenna. FPGAs will be used to stream the high data throughput, over 16 GB s−1, into PC memory.

scholarly journals Impact ofTeandneon edge current density profiles in ELM mitigated regimes on ASDEX Upgrade

2014 ◽  
Vol 55 (1) ◽  
pp. 013013 ◽  
Author(s):  
M.G. Dunne ◽  
S. Rathgeber ◽  
A. Burckhart ◽  
R. Fischer ◽  
L. Giannone ◽  
...  
Keyword(s):  
Current Density ◽  
Density Profiles ◽  
Edge Current
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