Results 11 to 20 of about 994 (182)
Stabilization and Onset of Sawteeth in TFTR [PDF]
Physical Review Letters, 1994 Measurements from the Tokamak Fusion Test Reactor (TFTR) of the q-profile using motional Stark effect (MSE) polarimetry and the pressure profiles have allowed detailed comparison of both supershots and L-mode discharges to theoretical models describing ...
J Manickam, S H Batha, M C Zarnstorff
exaly +7 more sources
Numerical modelling of sawteeth and sawtooth-free regime
Nuclear FusionTo better understand the sawteeth physics and the sawtooth-free regime associated with the hybrid scenario in tokamak experiments, numerical calculations up to quasi-steady state have been carried out for realistic middle-size tokamak plasma parameters ...
Q. Yu, S. Günter, K. Lackner
doaj +6 more sources
Non-Linear MHD Simulations of Sawteeth and Their Control by Current and Power Depositions [PDF]
Nuclear Fusion, 2018 Sawteeth in tokamak plasmas correspond to periodic relaxations of the temperature and density in the central region of the plasma, caused by the internal kink mode. They are a key player in core confinement and impurity transport in the central region of
Xavier Garbet +2 more
exaly +7 more sources
ICRF stabilization of sawteeth on TFTR [PDF]
, 1992 Results obtained from experiments utilizing high power ICRF (ion cyclotron range of frequency) heating to stabilize sawtooth oscillations on TFTR are reviewed.
Hammett, G. W. +29 more
core +7 more sources
Magnetic Reconnection During Sawteeth Crashes
Physics of Plasmas, 2023 Sawteeth oscillations are periodic relaxations of the core plasma density and temperature in tokamaks. The rise of the temperature due to external heating is terminated by the crash phase, which involves magnetic reconnection. This is the case of fast magnetic reconnection in collisionless plasmas (Lundquist number S≥108) with a strong guide field ...
Valentin Igochine
exaly +3 more sources
Destabilization of Fast Particle Stabilized Sawteeth in ASDEX Upgrade With Electron Cyclotron Current Drive [PDF]
Plasma Physics and Controlled Fusion, 2011 It is often observed that large sawteeth trigger the neoclassical tearing mode well below the usual threshold for this instability. At the same time, fast particles in the plasma core stabilize sawteeth and provide these large crashes. The paper presents
Dmitry Moseev +2 more
exaly +2 more sources
Numerical Simulations of Sawteeth in Tokamaks [PDF]
Nuclear Fusion, 1989 Note: Proc. 1989 Int. Sherwood Theory Conference, San Antonio, Texas, U.S.A., April 1989, 1D13 (1989) Reference CRPP-CONF-1989-047 Record created on 2008-05-13, modified on 2017-05 ...
Gregorio Vlad, A Bondeson
exaly +4 more sources
Transport of energetic ions due to sawteeth, Alfven eigenmodes and microturbulence [PDF]
Nuclear Fusion, 2011 Utilizing an array of new diagnostics and simulation/modelling techniques, recent DIII-D experiments have elucidated a variety of energetic ion transport behaviour in the presence of instabilities ranging from large-scale sawteeth to fine spatial scale
Pace, D. C. +4 more
core +10 more sources
On the Nature of Monster Sawteeth during ICRF Heating [PDF]
, 1999 A correlation between the presence of Energetic Particle Modes and long period sawteeth is explored. The crash of monster sawteeth is explained in terms of the loss of the stabilizing fast particles due to the EPM. High qa discharges, which never develop
Budny, R. +8 more
core +4 more sources
Development of magnetohydrodynamic modes during sawteeth in tokamak plasmas [PDF]
Physics of Plasmas, 2013 International audienceA dynamical analysis applied to a reduced resistive magnetohydrodynamics model is shown to explain the chronology of the nonlinear destabilization of modes observed in tokamak sawteeth.
Ettoumi, Wahb +17 more
core +6 more sources