2021
2.
Neto, E. Lascas; Graves, J. P.; Raghunathan, M.; Sommariva, C.; Pfefferlé, D.; Contributors, J. E. T.
Heavy Impurity Transport in Tokamaks Subject to Plasma Rotation, NTV and the Influence of Saturated Ideal MHD Perturbations Journal Article
In: Plasma Physics and Controlled Fusion, vol. 64, no. 1, pp. 014002, 2021, ISSN: 0741-3335.
Links | BibTeX | Tags: impurities, internal kink, neoclassical transport, plasma flow, VENUS-LEVIS
@article{netoHeavyImpurityTransport2021,
title = {Heavy Impurity Transport in Tokamaks Subject to Plasma Rotation, NTV and the Influence of Saturated Ideal MHD Perturbations},
author = {E. Lascas Neto and J. P. Graves and M. Raghunathan and C. Sommariva and D. Pfefferl\'{e} and J. E. T. Contributors},
doi = {10.1088/1361-6587/ac3964},
issn = {0741-3335},
year = {2021},
date = {2021-11-01},
urldate = {2021-11-01},
journal = {Plasma Physics and Controlled Fusion},
volume = {64},
number = {1},
pages = {014002},
publisher = {IOP Publishing},
keywords = {impurities, internal kink, neoclassical transport, plasma flow, VENUS-LEVIS},
pubstate = {published},
tppubtype = {article}
}
2017
1.
Raghunathan, M; Graves, J P; Nicolas, T; Cooper, W A; Garbet, X; Pfefferlé, D
Heavy impurity confinement in hybrid operation scenario plasmas with a rotating 1/1 continuous mode Journal Article
In: Plasma Physics and Controlled Fusion, vol. 59, no. 12, pp. 124002, 2017.
Abstract | Links | BibTeX | Tags: fast particles, impurities, neoclassical transport, plasma flow, VENUS-LEVIS
@article{raghunathan-2017,
title = {Heavy impurity confinement in hybrid operation scenario plasmas with a rotating 1/1 continuous mode},
author = {M Raghunathan and J P Graves and T Nicolas and W A Cooper and X Garbet and D Pfefferl\'{e}},
url = {https://iopscience.iop.org/article/10.1088/1361-6587/aa896f},
doi = {10.1088/1361-6587/aa896f},
year = {2017},
date = {2017-10-09},
journal = {Plasma Physics and Controlled Fusion},
volume = {59},
number = {12},
pages = {124002},
abstract = {In future tokamaks like ITER with tungsten walls, it is imperative to control tungsten accumulation in the core of operational plasmas, especially since tungsten accumulation can lead to radiative collapse and disruption. We investigate the behavior of tungsten trace impurities in a JET-like hybrid scenario with both axisymmetric and saturated 1/1 ideal helical core in the presence of strong plasma rotation. For this purpose, we obtain the equilibria from VMEC and use VENUS-LEVIS, a guiding-center orbit-following code, to follow heavy impurity particles. In this work, VENUS-LEVIS has been modified to account for strong plasma flows with associated neoclassical effects arising from such flows. We find that the combination of helical core and plasma rotation augments the standard neoclassical inward pinch compared to axisymmetry, and leads to a strong inward pinch of impurities towards the magnetic axis despite the strong outward diffusion provided by the centrifugal force, as frequently observed in experiments.},
keywords = {fast particles, impurities, neoclassical transport, plasma flow, VENUS-LEVIS},
pubstate = {published},
tppubtype = {article}
}
In future tokamaks like ITER with tungsten walls, it is imperative to control tungsten accumulation in the core of operational plasmas, especially since tungsten accumulation can lead to radiative collapse and disruption. We investigate the behavior of tungsten trace impurities in a JET-like hybrid scenario with both axisymmetric and saturated 1/1 ideal helical core in the presence of strong plasma rotation. For this purpose, we obtain the equilibria from VMEC and use VENUS-LEVIS, a guiding-center orbit-following code, to follow heavy impurity particles. In this work, VENUS-LEVIS has been modified to account for strong plasma flows with associated neoclassical effects arising from such flows. We find that the combination of helical core and plasma rotation augments the standard neoclassical inward pinch compared to axisymmetry, and leads to a strong inward pinch of impurities towards the magnetic axis despite the strong outward diffusion provided by the centrifugal force, as frequently observed in experiments.