Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments

M. Schneider; T. Johnson; R. Dumont; J. Eriksson; L. G. Eriksson; L. Giacomelli; J. B. Girardo; T. Hellsten; E. Khilkevitch; V. G. Kiptily; T. Koskela; M. Mantsinen; M. Nocente; M. Salewski; S. E. Sharapov; A. E. Shevelev

doi:10.1088/0029-5515/56/11/112022

Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments

M. Schneider, T. Johnson, R. Dumont, J. Eriksson, L. G. Eriksson, L. Giacomelli, J. B. Girardo, T. Hellsten, E. Khilkevitch, V. G. Kiptily, T. Koskela, M. Mantsinen, M. Nocente, M. Salewski, S. E. Sharapov, A. E. Shevelev

Department of Applied Physics

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30 Citations (Scopus)

Abstract

Recent JET experiments have been dedicated to the studies of fusion reactions between deuterium (D) and Helium-3 (³He) ions using neutral beam injection (NBI) in synergy with third harmonic ion cyclotron radio-frequency heating (ICRH) of the beam. This scenario generates a fast ion deuterium tail enhancing DD and D³He fusion reactions. Modelling and measuring the fast deuterium tail accurately is essential for quantifying the fusion products. This paper presents the modelling of the D distribution function resulting from the NBI+ICRF heating scheme, reinforced by a comparison with dedicated JET fast ion diagnostics, showing an overall good agreement. Finally, a sawtooth activity for these experiments has been observed and interpreted using SPOT/RFOF simulations in the framework of Porcelli's theoretical model, where NBI+ICRH accelerated ions are found to have a strong stabilizing effect, leading to monster sawteeth.

Original language	English
Article number	112022
Journal	Nuclear Fusion
Volume	56
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/56/11/112022
Publication status	Published - 24 Aug 2016
MoE publication type	A1 Journal article-refereed

Keywords

fast ions
gamma spectroscopy
ICRH
integrated modeling
neutron spectroscopy
synthetic diagnostics
tokamak

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Schneider, M., Johnson, T., Dumont, R., Eriksson, J., Eriksson, L. G., Giacomelli, L., Girardo, J. B., Hellsten, T., Khilkevitch, E., Kiptily, V. G., Koskela, T., Mantsinen, M., Nocente, M., Salewski, M., Sharapov, S. E., & Shevelev, A. E. (2016). Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments. Nuclear Fusion, 56(11), [112022]. https://doi.org/10.1088/0029-5515/56/11/112022

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abstract = "Recent JET experiments have been dedicated to the studies of fusion reactions between deuterium (D) and Helium-3 (3He) ions using neutral beam injection (NBI) in synergy with third harmonic ion cyclotron radio-frequency heating (ICRH) of the beam. This scenario generates a fast ion deuterium tail enhancing DD and D3He fusion reactions. Modelling and measuring the fast deuterium tail accurately is essential for quantifying the fusion products. This paper presents the modelling of the D distribution function resulting from the NBI+ICRF heating scheme, reinforced by a comparison with dedicated JET fast ion diagnostics, showing an overall good agreement. Finally, a sawtooth activity for these experiments has been observed and interpreted using SPOT/RFOF simulations in the framework of Porcelli's theoretical model, where NBI+ICRH accelerated ions are found to have a strong stabilizing effect, leading to monster sawteeth.",

keywords = "fast ions, gamma spectroscopy, ICRH, integrated modeling, neutron spectroscopy, synthetic diagnostics, tokamak",

author = "M. Schneider and T. Johnson and R. Dumont and J. Eriksson and Eriksson, {L. G.} and L. Giacomelli and Girardo, {J. B.} and T. Hellsten and E. Khilkevitch and Kiptily, {V. G.} and T. Koskela and M. Mantsinen and M. Nocente and M. Salewski and Sharapov, {S. E.} and Shevelev, {A. E.}",

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Schneider, M, Johnson, T, Dumont, R, Eriksson, J, Eriksson, LG, Giacomelli, L, Girardo, JB, Hellsten, T, Khilkevitch, E, Kiptily, VG, Koskela, T, Mantsinen, M, Nocente, M, Salewski, M, Sharapov, SE & Shevelev, AE 2016, 'Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments', Nuclear Fusion, vol. 56, no. 11, 112022. https://doi.org/10.1088/0029-5515/56/11/112022

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AU - Schneider, M.

AU - Johnson, T.

AU - Dumont, R.

AU - Eriksson, J.

AU - Eriksson, L. G.

AU - Giacomelli, L.

AU - Girardo, J. B.

AU - Hellsten, T.

AU - Khilkevitch, E.

AU - Kiptily, V. G.

AU - Koskela, T.

AU - Mantsinen, M.

AU - Nocente, M.

AU - Salewski, M.

AU - Sharapov, S. E.

AU - Shevelev, A. E.

PY - 2016/8/24

Y1 - 2016/8/24

N2 - Recent JET experiments have been dedicated to the studies of fusion reactions between deuterium (D) and Helium-3 (3He) ions using neutral beam injection (NBI) in synergy with third harmonic ion cyclotron radio-frequency heating (ICRH) of the beam. This scenario generates a fast ion deuterium tail enhancing DD and D3He fusion reactions. Modelling and measuring the fast deuterium tail accurately is essential for quantifying the fusion products. This paper presents the modelling of the D distribution function resulting from the NBI+ICRF heating scheme, reinforced by a comparison with dedicated JET fast ion diagnostics, showing an overall good agreement. Finally, a sawtooth activity for these experiments has been observed and interpreted using SPOT/RFOF simulations in the framework of Porcelli's theoretical model, where NBI+ICRH accelerated ions are found to have a strong stabilizing effect, leading to monster sawteeth.

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KW - integrated modeling

KW - neutron spectroscopy

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Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments

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