Results 11 to 20 of about 340,606 (99)

Effects of the applied magnetic fields with various toroidal phase differences on the neoclassical toroidal viscosity in JT-60SA

Nuclear Fusion, 2018
The integrated framework consisting of TOPICS, VMEC and FORTEC-3D, has been applied to provide an estimate of the neoclassical toroidal viscosity (NTV) produced by the applied magnetic perturbations (MPs). Six picture-frame error field correction coils in each row in JT-60SA realize the various patterns of the applied magnetic field spectrum.
M. Honda, S. Satake, Y. Suzuki, G. Matsunaga, K. Shinohara, N. Aiba, M. Yoshida, S. Ide   +7 more
openaire   +3 more sources

Calculation of neoclassical toroidal viscosity with a particle simulation in the tokamak magnetic braking experiments [PDF]

, 2013
Accurate calculation of perturbed distribution function #14;δf and perturbed magnetic fi eld #14;δB is essential to achieve prediction of non-ambipolar transport and neoclassical toroidal viscosity (NTV) in perturbed tokamaks. This paper reports a study of the NTV with a #14;δf particle code (POCA) and improved understanding of magnetic braking in ...
Kimin Kim, Jong-Kyu Park, Gerrit Kramer, Allen Boozer, Jonathan Menard, Stefan Gerhardt, Nikolas Logan, Keith Burrell, Andrea Garofalo   +8 more
openaire   +4 more sources

Comparison of toroidal viscosity with neoclassical theory [PDF]

Comparison of toroidal viscosity with neoclassical theory
Toroidal rotation profiles are measured with charge exchange spectroscopy for a plasma heated with tangential neutral beam injection (NBI) in the Compact Helical System (CHS) heliotron/torsatron device [Ida et al., Phys. Rev. Lett. 67, 58 (1991)] to estimate the toroidal viscosity.
Ida, K., Nakajima, N.
openaire   +2 more sources

Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection. [PDF]

Phys Plasmas, 2017
A model-based feedback system is presented enabling the simultaneous control of the stored energy through βn and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device.
Goumiri IR, Rowley CW, Sabbagh SA, Gates DA, Boyer MD, Gerhardt SP, Kolemen E, Menard JE.   +7 more
europepmc   +2 more sources

How to calculate the neoclassical viscosity, diffusion, and current coefficients in general toroidal plasmas [PDF]

How to calculate the neoclassical viscosity, diffusion, and current coefficients in general toroidal plasmas
A novel method to obtain the full neoclassical transport matrix for general toroidal plasmas by using the solution of the linearized drift kinetic equation with the pitch-angle-scattering collision operator is shown. In this method, the neoclassical coefficients for both poloidal and toroidal viscosities in toroidal helical systems can be obtained, and
Nishimura, S.", "Sugama, H.
core   +5 more sources

Measurement of MAST edge ion temperatures and velocities [PDF]

, 2011
A novel experimental method using gas puffing of neutrals to stimulate charge exchange emission has been developed to measure ion temperatures and toroidal rotation velocities in the edge of MAST.
Morgan, Thomas
core   +6 more sources

Evidence of Neoclassical Toroidal Viscosity on the Neoclassical Tearing Modes in TCV tokamak

Journal of Physics: Conference Series, 2012
The interplay between the plasma toroidal rotation and the onset of magnetohydrodynamics instabilities, such as the Neoclassical Tearing Modes (NTMs), is an important issue for tokamak performance. An interesting mechanism characterizing this interaction is the breaking of axisymmetry due to the NTM helical structure, which is the source of a magnetic ...
Nowak, S (Nowak, S.)[ 1 ], Lazzaro, E (Lazzaro, E.)[ 1 ], Sauter, O (Sauter, O.)[2], Canal, G (Canal, G.)[2], Duval, B (Duval, B.)[2], Federspiel, L (Federspiel, L.)[2], Karpushov, AN (Karpushov, A. N.)[2], Kim, D (Kim, D.)[2], Reimerdes, H (Reimerdes, H.)[2], Rossel, J (Rossel, J.)[2], The, DW (The, D. Wagner)[2], the TCV Team   +11 more
openaire   +2 more sources

Toroidal-poloidal partitioning of plate motions since 120 MA [PDF]

, 1993
Changes in plate motions and plate configurations during the Cenozoic and Mesozoic have been investigated extensively, but most geodynamical models have concentrated on present-day plate motions.
Richards, M.A., Ricard, Y, Lithgow-Bertelloni, C., Ricard, Y., O'Connell, R.J., Richards, MA, Engebretson, D.C., Lithgow‐Bertelloni, C, O'Connell, RJ, Engebretson, DC   +9 more
core   +1 more source

Kinetic Energy Principle And Neoclassical Toroidal Torque In Tokamaks [PDF]

, 2011
It is shown that when tokamaks are perturbed the kinetic energy principle is closely related to the neoclassical toroidal torque by the action invariance of particles.
Park, Jong-Kyu, Jong-Kyu Park
core   +1 more source

Ripple-induced neoclassical toroidal viscous torque in Augmented-First Plasma operation phase in ITER

Nuclear Fusion
A systematic calculation is performed on the ripple-induced neoclassical toroidal viscous (NTV) torque for new ITER scenarios designed for the Augmented-First Plasma (A-FP) operation phase with the full tungsten wall, where the plasma-wall gap is varied ...
Yueqiang Liu, Xue Bai, Y. Gribov, F. Koechl, A. Loarte, S.D. Pinches, L. Schmitz   +6 more
doaj   +1 more source