# Heat diffusion across magnetic islands and ergodized plasma regions in realistic tokamak geometry

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Details how measurements of the local toroidal magnetic field have been achieved on the helicity injected tokamak using the transient internal probe. Diagnostic arrangement; Internal magnetic field measurements; Optical detection system.

- Energy limits on runaway electrons in tokamak plasmas. Martin-Solis, J.R.; Esposito, B. // Physics of Plasmas;Jan1999, Vol. 6 Issue 1, p238
Presents a test particle description of the runaway dynamics to analyze some of the main mechanisms limiting the runaway energy in a tokamak plasma. Synchroton radiation losses associated with the electron gyromotion around the magnetic field lines; Problem of determining the influence of a...

- MHD limits in non-inductive tokamak plasmas: simulations and comparison to experiments on Tore Supra. Maget, P.; Lütjens, H.; Huysmans, G.; Ottaviani, M.; Garbet, X.; Moreau, Ph.; Ségui, J.-L. // AIP Conference Proceedings;11/15/2008, Vol. 1069 Issue 1, p153
Non-inductive tokamak discharges with a flat or hollow current profile are prone to the triggering of large tearing modes when the minimum of the safety factor is just below a low order rational. This issue is of particular importance for discussing the optimal safety factor for MHD modes...

- Lagrangian dynamics of a charged particle in a tokamak magnetic field. Dendy, R. O. // Physics of Fluids B: Plasma Physics;Jul91, Vol. 3 Issue 7, p1644
The Eulerâ€“Lagrange equations for a charged particle in a tokamak magnetic field, in the limit of large aspect ratio, are obtained in terms of toroidal coordinates (r,Î¸,[lowercase_phi_synonym],r,Î¸,[lowercase_phi_synonym]) from the exact Lagrangian, which is expressed in terms of the...

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The motion of charged particles in a linearly polarized EH-ubitron field with sinusoidal time dependence of the variable component of the magnetic field is investigated. It is shown that, depending on the parameters of the system and the initial conditions of entry of the particle into the...

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It is well-known that the motion of a charged particle in a magnetic field is described by the drift approximation, in which it is assumed that the squared velocity of the particle and the magnetic moment of the Larmor circle are conserved. It is shown that to a first approximation a third...

- Statistical description and transport in stochastic magnetic fields. Vanden Eijnden, E.; Balescu, R. // Physics of Plasmas;Mar1996, Vol. 3 Issue 3, p874
Presents the statistical description of particle motion in a stochastic magnetic field. Stochastic Liouville equation associated with equations of motion of a test particle; Probability distribution function of the system for magnetic fields and collisional processes; Influence on the...

- Particle acceleration near X-type magnetic neutral lines. Deeg, Hans-Jörg; Borovsky, Joseph E.; Duric, Nebojsa // Physics of Fluids B: Plasma Physics;Sep91, Vol. 3 Issue 9, p2660
The behavior of charged particles near X-type magnetic neutral lines is investigated. The magnetic field is taken to be hyperbolic and time stationary, with a uniform electric field perpendicular to the magnetic field. The general properties of the orbits of noninteracting particles in that...

- Stochastic particle diffusion in velocity space for a bumpy torus. Chen, G. L.; Owen, L. W.; Batchelor, D. B.; Hedrick, C. L. // Physics of Fluids (00319171);Mar85, Vol. 28 Issue 3, p883
Nonadiabatic changes of the magnetic moment Î¼ in the ELMO Bumpy Torus-Scale (EBT-S) have been studied both analytically and numerically. Simple forms of Î” Î¼ and gyrophase change were obtained, permitting the changes in these quantities to be studied using an iteration mapping. The...