The Effect of Externally Applied Resonant Magnetic Perturbations on Fusion Product Dynamics in Toroidal Plasmas: Numerical Simulation

Moskvitina, Yu.K.; Moskvitin, A. O.; Shyshkin, Oleg; Yavorskij, V.; Schoepf, K.

doi:10.1007/s10894-012-9557-x

Cited by 1 publication

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Weston M. Stacey [14,15] thought ion orbit loss had a close relationship with ion energy and ion transport, which indicated the importance of fast ion loss on plasma confinement. Experiments [16][17][18] and simulations [19,20] had also demonstrated that RMPs could induce additional fast ion loss in a wide range from L-mode to ELM suppressed H-mode discharges. Many researches focus on the stochasticity at the boundary of the plasma, and it is thought that that is the main cause of additional fast ion loss.…”

Section: Introductionmentioning

confidence: 95%

“…Figure 1(b) shows the corresponding topology of the magnetic surfaces when RMP currents are added with = n 1 and = j 100kA rmp . The plot is obtained by tracing the magnetic field lines according to the field line equations [20]. It is demonstrated that magnetic field lines draw out a series of magnetic islands and a layer of stochastic region, both of which are called resonant regions in this paper.…”

mentioning

confidence: 94%

See 1 more Smart Citation

Effect of resonant magnetic perturbations on fast ion prompt loss in tokamaks

Mou¹,

Wang²,

Wu³

et al. 2017

Nucl. Fusion

View full text Add to dashboard Cite

Fast ion prompt loss induced by resonant magnetic perturbations (RMPs) is simulated by solving Hamiltonian equations strictly in the guiding center coordinate system. Full orbit simulations show that the prompt loss rate can increase significantly in resonant regions when RMPs are added. Furthermore, the prompt loss rate is larger in the low-field side than in the high-field side in tokamak plasmas. Detailed analyses show that a number of trapped ions which lie near the center of the trapped region can be lost, because of the enhancement of radial orbit drifts induced by the resonance between RMPs and the unperturbed orbit. Meanwhile, orbit conversion from counter-passing orbit to trapped orbit occurs near the trapped-passing boundary in the low-field side, while it occurs near the co-counter boundary in the high-field side, both of which play an important role in prompt loss. Simulations also demonstrate a periodicity for orbit drifts, and the mechanism of drift periodicity results from the resonance between RMP and the equilibrium magnetic field.

show abstract