Efficient generation of energetic ions in multi-ion plasmas by radio-frequency heating

JET Contributors, Ye. O. Kazakov, J. Ongena, J. C. Wright, S. J. Wukitch, E. Lerche, M. J. Mantsinen, D. van Eester, T. Craciunescu, V. G. Kiptily, Y. Lin, M. Nocente, F. Nabais, M. F. F. Nave, Y. Baranov, J. Bielecki, R. Bilato, V. Bobkov, K. Crombé, A. Czarnecka & 31 others J. M. Faustin, R. Felton, M. Fitzgerald, D. Gallart, L. Giacomelli, T. Golfinopoulos, A. E. Hubbard, Ph. Jacquet, T. Johnson, M. Lennholm, T. Loarer, M. Porkolab, S. E. Sharapov, D. Valcarcel, M. van Schoor, H. Weisen, M. Beurskens, J. Boom, M. Bowden, J. Citrin, M. P. Cox, M. de Bock, E. Delabie, T. Donné, G. T. A. Huijsmans, F. Jaulmes, A. Kappatou, M. Kempenaars, A. Shumack, A. C. C. Sips, G. J. van Rooij

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Abstract

We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed `three-ion' scenarios are especially suited for strong wave absorption by a very low number of resonant ions. To observe this effect, the plasma composition has to be properly adjusted, as prescribed by theory. We demonstrate the potential of the method on the world-largest plasma magnetic confinement device, JET (Joint European Torus, Culham, UK), and the high-magnetic-field tokamak Alcator C-Mod (Cambridge, USA). The obtained results demonstrate efficient acceleration of 3He ions to high energies in dedicated hydrogen-deuterium mixtures. Simultaneously, effective plasma heating is observed, as a result of the slowing-down of the fast 3He ions. The developed technique is not only limited to laboratory plasmas, but can also be applied to explain observations of energetic ions in space-plasma environments, in particular, 3He-rich solar flares.
LanguageEnglish
Pages973-978
JournalNature Physics
Volume13
Issue number10
DOIs
StatePublished - 1 Oct 2017

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radio frequency heating
ions
plasma composition
plasma heating
cyclotrons
deuterium
electromagnetism
magnetic fields

Cite this

@article{9f8c930aaa4e46b6a07fb6378038bb4d,
title = "Efficient generation of energetic ions in multi-ion plasmas by radio-frequency heating",
abstract = "We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed `three-ion' scenarios are especially suited for strong wave absorption by a very low number of resonant ions. To observe this effect, the plasma composition has to be properly adjusted, as prescribed by theory. We demonstrate the potential of the method on the world-largest plasma magnetic confinement device, JET (Joint European Torus, Culham, UK), and the high-magnetic-field tokamak Alcator C-Mod (Cambridge, USA). The obtained results demonstrate efficient acceleration of 3He ions to high energies in dedicated hydrogen-deuterium mixtures. Simultaneously, effective plasma heating is observed, as a result of the slowing-down of the fast 3He ions. The developed technique is not only limited to laboratory plasmas, but can also be applied to explain observations of energetic ions in space-plasma environments, in particular, 3He-rich solar flares.",
author = "{JET Contributors} and Kazakov, {Ye. O.} and J. Ongena and Wright, {J. C.} and Wukitch, {S. J.} and E. Lerche and Mantsinen, {M. J.} and {van Eester}, D. and T. Craciunescu and Kiptily, {V. G.} and Y. Lin and M. Nocente and F. Nabais and Nave, {M. F. F.} and Y. Baranov and J. Bielecki and R. Bilato and V. Bobkov and K. Cromb{\'e} and A. Czarnecka and Faustin, {J. M.} and R. Felton and M. Fitzgerald and D. Gallart and L. Giacomelli and T. Golfinopoulos and Hubbard, {A. E.} and Ph. Jacquet and T. Johnson and M. Lennholm and T. Loarer and M. Porkolab and Sharapov, {S. E.} and D. Valcarcel and {van Schoor}, M. and H. Weisen and M. Beurskens and J. Boom and M. Bowden and J. Citrin and Cox, {M. P.} and {de Bock}, M. and E. Delabie and T. Donn{\'e} and Huijsmans, {G. T. A.} and F. Jaulmes and A. Kappatou and M. Kempenaars and A. Shumack and Sips, {A. C. C.} and {van Rooij}, {G. J.}",
year = "2017",
month = "10",
day = "1",
doi = "10.1038/nphys4167",
language = "English",
volume = "13",
pages = "973--978",
journal = "Nature Physics",
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Efficient generation of energetic ions in multi-ion plasmas by radio-frequency heating. / JET Contributors.

In: Nature Physics, Vol. 13, No. 10, 01.10.2017, p. 973-978.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Efficient generation of energetic ions in multi-ion plasmas by radio-frequency heating

AU - JET Contributors

AU - Kazakov,Ye. O.

AU - Ongena,J.

AU - Wright,J. C.

AU - Wukitch,S. J.

AU - Lerche,E.

AU - Mantsinen,M. J.

AU - van Eester,D.

AU - Craciunescu,T.

AU - Kiptily,V. G.

AU - Lin,Y.

AU - Nocente,M.

AU - Nabais,F.

AU - Nave,M. F. F.

AU - Baranov,Y.

AU - Bielecki,J.

AU - Bilato,R.

AU - Bobkov,V.

AU - Crombé,K.

AU - Czarnecka,A.

AU - Faustin,J. M.

AU - Felton,R.

AU - Fitzgerald,M.

AU - Gallart,D.

AU - Giacomelli,L.

AU - Golfinopoulos,T.

AU - Hubbard,A. E.

AU - Jacquet,Ph.

AU - Johnson,T.

AU - Lennholm,M.

AU - Loarer,T.

AU - Porkolab,M.

AU - Sharapov,S. E.

AU - Valcarcel,D.

AU - van Schoor,M.

AU - Weisen,H.

AU - Beurskens,M.

AU - Boom,J.

AU - Bowden,M.

AU - Citrin,J.

AU - Cox,M. P.

AU - de Bock,M.

AU - Delabie,E.

AU - Donné,T.

AU - Huijsmans,G. T. A.

AU - Jaulmes,F.

AU - Kappatou,A.

AU - Kempenaars,M.

AU - Shumack,A.

AU - Sips,A. C. C.

AU - van Rooij,G. J.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed `three-ion' scenarios are especially suited for strong wave absorption by a very low number of resonant ions. To observe this effect, the plasma composition has to be properly adjusted, as prescribed by theory. We demonstrate the potential of the method on the world-largest plasma magnetic confinement device, JET (Joint European Torus, Culham, UK), and the high-magnetic-field tokamak Alcator C-Mod (Cambridge, USA). The obtained results demonstrate efficient acceleration of 3He ions to high energies in dedicated hydrogen-deuterium mixtures. Simultaneously, effective plasma heating is observed, as a result of the slowing-down of the fast 3He ions. The developed technique is not only limited to laboratory plasmas, but can also be applied to explain observations of energetic ions in space-plasma environments, in particular, 3He-rich solar flares.

AB - We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed `three-ion' scenarios are especially suited for strong wave absorption by a very low number of resonant ions. To observe this effect, the plasma composition has to be properly adjusted, as prescribed by theory. We demonstrate the potential of the method on the world-largest plasma magnetic confinement device, JET (Joint European Torus, Culham, UK), and the high-magnetic-field tokamak Alcator C-Mod (Cambridge, USA). The obtained results demonstrate efficient acceleration of 3He ions to high energies in dedicated hydrogen-deuterium mixtures. Simultaneously, effective plasma heating is observed, as a result of the slowing-down of the fast 3He ions. The developed technique is not only limited to laboratory plasmas, but can also be applied to explain observations of energetic ions in space-plasma environments, in particular, 3He-rich solar flares.

U2 - 10.1038/nphys4167

DO - 10.1038/nphys4167

M3 - Article

VL - 13

SP - 973

EP - 978

JO - Nature Physics

T2 - Nature Physics

JF - Nature Physics

SN - 1745-2473

IS - 10

ER -