Results 261 to 270 of about 34,895 (295)

Magnetic field topology modeling under resonant magnetic perturbations on EAST

Plasma Science and Technology, 2019
In order to understand the mechanism by which the resonant magnetic perturbation (RMP) mitigates or suppresses the edge-localized mode (ELM), the topological study of the edge magnetic field in ELM mitigation or suppression phase is a critical issue.
Jie HUANG, Yasuhiro SUZUKI, Yunfeng LIANG, Manni JIA, Youwen SUN, Nan CHU, Jichan XU, Muquan WU   +7 more
openaire   +1 more source

Resonant magnetic perturbation effect on tearing mode dynamics

Nuclear Fusion, 2010
The effect of a resonant magnetic perturbation (RMP) on the tearing mode (TM) dynamics is experimentally studied in the EXTRAP T2R device. EXTRAP T2R is equipped with a set of sensor coils and active coils connected by a digital controller allowing a feedback control of the magnetic instabilities.
L. Frassinetti, K.E.J. Olofsson, P.R. Brunsell, J.R. Drake   +3 more
openaire   +1 more source

Shielding of resonant magnetic perturbations by rotation

Physics of Plasmas, 1996
Magnetic perturbations that drive islands are shielded from a rotating plasma by either a torque limit or an equilibrium limit. The physics of the shielding is given in a simple slab model along with the mechanism by which the shielding currents are maintained.
openaire   +2 more sources

Nuclear magnetic resonance microscopy of single neurons under hypotonic perturbation

American Journal of Physiology-Cell Physiology, 1996
Nuclear magnetic resonance (NMR) characteristics of water in perfused single neurons undergoing a 20% hypotonic perturbation were examined quantitatively using NMR microscopy. The transverse relaxation times (T2) in the cytoplasm and nucleus increased by 24.0 +/- 8.5% (average +/- SE, n = 8) and 29.7 +/- 5.3% (n = 6), respectively, whereas the ...
E W, Hsu, N R, Aiken, S J, Blackband
openaire   +2 more sources

ELM suppression by resonant magnetic perturbations at DIII-D

2009 23rd IEEE/NPSS Symposium on Fusion Engineering, 2009
Edge localized mode (ELM) suppression by resonant magnetic perturbations (RMPs) is being studied at DIII-D with ITER-similar plasma shapes and edge collisionalities. Suppression at low collisionality correlates with overlap of vacuum magnetic field islands in a quantified edge layer at moderate q.
M.J. Schaffer, T.E. Evans, R.A. Moyer, M.E. Fenstermacher   +3 more
openaire   +1 more source

Longitudinal perturbations of plasma nuclear magnetic resonance profiles in neonatal encephalopathy

Pediatric Research, 2023
Neonatal encephalopathy (NE) is a major cause of mortality and severe neurological disability in the neonatal period and beyond. We hypothesized that the degree of brain injury is reflected in the molecular composition of peripheral blood samples.A sub-cohort of 28 newborns included in the HYPOTOP trial was studied.
Cascant-Vilaplana MM, Lara-Cantón I, Nunez-Ramiro, Antonio, Solaz-García Á, Llorens-Salvador R, Quintás G, Kuligowski, Julia, Vento, Maximo   +7 more
openaire   +3 more sources

Penetration of resonant magnetic perturbations in turbulent edge plasmas

Nuclear Fusion, 2014
Comprehension of the interactions between tokamak edge plasmas and externally induced resonant magnetic perturbations (RMPs) is an important step in the understanding of the control of edge-localized modes by these RMPs. Such control has been demonstrated experimentally, but previous theoretical investigations have revealed a possible screening of RMPs
A. Monnier, G. Fuhr, P. Beyer, F.A. Marcus, S. Benkadda, X. Garbet   +5 more
openaire   +1 more source

Screening of resonant magnetic perturbations by flows in tokamaks

Nuclear Fusion, 2012
Abstract The non-linear reduced four-field RMHD model in cylindrical geometry was extended to include plasma rotation, neoclassical poloidal viscosity and two fluid diamagnetic effects. Interaction of the static resonant magnetic perturbations (RMPs) with the rotating plasmas in tokamaks was studied.
M. Becoulet, F. Orain, P. Maget, N. Mellet, X. Garbet, E. Nardon, G.T.A. Huysmans, T. Casper, A. Loarte, P. Cahyna, A. Smolyakov, F.L. Waelbroeck, M. Schaffer, T. Evans, Y. Liang, O. Schmitz, M. Beurskens, V. Rozhansky, E. Kaveeva   +18 more
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Nuclear magnetic double resonance: Perturbation of double quantum transitions

Journal of Magnetic Resonance (1969), 1971
Abstract NMR double resonance spectra, where the second rf field is centered on a double quantum transition, are discussed. The theoretical treatment is performed by a transformation to the rotating frame, and the close connection to the treatment of double quantum spectra is brought out.
B Gestblom, O Hartmann
openaire   +1 more source

Influence of resonant magnetic perturbations on plasma edge turbulence

Physics of Plasmas, 1997
This work reports alterations on plasma-edge equilibrium profiles and on edge turbulence, and anomalous transport induced by resonant perturbing magnetic fields in the TBR (Brazilian Tokamak) tokamak [J. Fusion Energy 12, 295 (1993)]. Thus, these perturbations have reduced the equilibrium parameters and the spectral power of the fluctuations and ...
R. M. Castro, M. V. A. P. Heller, I. L. Caldas, Z. A. Brası́lio, R. P. da Silva, I. C. Nascimento   +5 more
openaire   +1 more source