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

Yevgen Kazakov (Corresponding Author), Leena Aho-Mantila, Markus Airila, Antti Hakola, Seppo Koivuranta, Jari Likonen, S.-P. Pehkonen, Antti Salmi, Paula Siren, Tuomas Tala, et al.

    Research output: Contribution to journalArticleScientificpeer-review

    25 Citations (Scopus)

    Abstract

    We describe a new technique for the effcient 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 effcient 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.

    Original languageEnglish
    Pages (from-to)973-978
    Number of pages6
    JournalNature Physics
    Volume13
    Issue number10
    DOIs
    Publication statusPublished - 4 Oct 2017
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    radio frequency heating
    ions
    Joint European Torus
    plasma composition
    space plasmas
    plasma heating
    solar flares
    cyclotrons
    deuterium
    electromagnetism

    Cite this

    @article{c7f0508c014044fa9c8fd023842b3b44,
    title = "Effcient generation of energetic ions in multi-ion plasmas by radio-frequency heating",
    abstract = "We describe a new technique for the effcient 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 effcient 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 = "Yevgen Kazakov and Leena Aho-Mantila and Markus Airila and Antti Hakola and Seppo Koivuranta and Jari Likonen and S.-P. Pehkonen and Antti Salmi and Paula Siren and Tuomas Tala and {et al.}",
    year = "2017",
    month = "10",
    day = "4",
    doi = "10.1038/nphys4167",
    language = "English",
    volume = "13",
    pages = "973--978",
    journal = "Nature Physics",
    issn = "1745-2473",
    publisher = "Nature Publishing Group",
    number = "10",

    }

    Effcient generation of energetic ions in multi-ion plasmas by radio-frequency heating. / Kazakov, Yevgen (Corresponding Author); Aho-Mantila, Leena; Airila, Markus; Hakola, Antti; Koivuranta, Seppo; Likonen, Jari; Pehkonen, S.-P.; Salmi, Antti; Siren, Paula; Tala, Tuomas; et al.

    In: Nature Physics, Vol. 13, No. 10, 04.10.2017, p. 973-978.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

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

    AU - Kazakov, Yevgen

    AU - Aho-Mantila, Leena

    AU - Airila, Markus

    AU - Hakola, Antti

    AU - Koivuranta, Seppo

    AU - Likonen, Jari

    AU - Pehkonen, S.-P.

    AU - Salmi, Antti

    AU - Siren, Paula

    AU - Tala, Tuomas

    AU - et al.,

    PY - 2017/10/4

    Y1 - 2017/10/4

    N2 - We describe a new technique for the effcient 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 effcient 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 effcient 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 effcient 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.

    UR - http://www.scopus.com/inward/record.url?scp=85021251328&partnerID=8YFLogxK

    U2 - 10.1038/nphys4167

    DO - 10.1038/nphys4167

    M3 - Article

    AN - SCOPUS:85021251328

    VL - 13

    SP - 973

    EP - 978

    JO - Nature Physics

    JF - Nature Physics

    SN - 1745-2473

    IS - 10

    ER -