Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET

Y. Lin, P. Mantica, T. Hellsten, V. Kiptily, E. Lerche, M.F.F. Nave, J.E. Rice, D. Van Eester, P.C. De Vries, R. Felton, C. Giroud, Tuomas Tala, JET EFDA contributors

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)

    Abstract

    Ion cyclotron range of frequency (ICRF) mode conversion has been shown to drive toroidal flow in JET D(3He) L-mode plasmas: Bt0 = 3.45 T, ne0 ~ 3 × 1019 m−3, Ip = 2.8 and 1.8 MA, PRF ≤ 3 MW at 33 MHz and −90° phasing. Central toroidal rotation in the counter-Ip direction, with ωphiv0 up to 10 krad s−1 (Vphiv0 ~ 30 km s−1, central thermal Mach number Mth (0) ~ 0.07 and Alfvén Mach number MA (0) ~ 0.003) has been observed. The flow drive effect is sensitive to the 3He concentration and the largest rotation is observed in the range X[3He] = nHe3/ne ~ 10–17%. The rotation profile is peaked near the magnetic axis, and the central rotation scales with the input RF power. The effective torque density profile from the RF power has been calculated and the total torque is estimated to be as high as 50% of the same power from neutral beam injection, and a factor of 5 larger than the direct momentum injection from the RF waves. RF physics modeling using the TORIC code shows that the interaction between the mode converted ion cyclotron wave and the 3He ions, and associated asymmetry in space and momentum, may be key for flow drive.
    Original languageEnglish
    Article number074001
    JournalPlasma Physics and Controlled Fusion
    Volume54
    Issue number7
    DOIs
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed

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    Cyclotrons
    cyclotrons
    Plasmas
    Ions
    Mach number
    torque
    Momentum
    ions
    Torque
    momentum
    beam injection
    neutral beams
    profiles
    counters
    Physics
    asymmetry
    injection
    physics
    interactions

    Cite this

    Lin, Y., Mantica, P., Hellsten, T., Kiptily, V., Lerche, E., Nave, M. F. F., ... contributors, JET. EFDA. (2012). Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET. Plasma Physics and Controlled Fusion, 54(7), [074001]. https://doi.org/10.1088/0741-3335/54/7/074001
    Lin, Y. ; Mantica, P. ; Hellsten, T. ; Kiptily, V. ; Lerche, E. ; Nave, M.F.F. ; Rice, J.E. ; Van Eester, D. ; De Vries, P.C. ; Felton, R. ; Giroud, C. ; Tala, Tuomas ; contributors, JET EFDA. / Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET. In: Plasma Physics and Controlled Fusion. 2012 ; Vol. 54, No. 7.
    @article{645f56288f54415298a9bd940f605a75,
    title = "Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET",
    abstract = "Ion cyclotron range of frequency (ICRF) mode conversion has been shown to drive toroidal flow in JET D(3He) L-mode plasmas: Bt0 = 3.45 T, ne0 ~ 3 × 1019 m−3, Ip = 2.8 and 1.8 MA, PRF ≤ 3 MW at 33 MHz and −90° phasing. Central toroidal rotation in the counter-Ip direction, with ωphiv0 up to 10 krad s−1 (Vphiv0 ~ 30 km s−1, central thermal Mach number Mth (0) ~ 0.07 and Alfv{\'e}n Mach number MA (0) ~ 0.003) has been observed. The flow drive effect is sensitive to the 3He concentration and the largest rotation is observed in the range X[3He] = nHe3/ne ~ 10–17{\%}. The rotation profile is peaked near the magnetic axis, and the central rotation scales with the input RF power. The effective torque density profile from the RF power has been calculated and the total torque is estimated to be as high as 50{\%} of the same power from neutral beam injection, and a factor of 5 larger than the direct momentum injection from the RF waves. RF physics modeling using the TORIC code shows that the interaction between the mode converted ion cyclotron wave and the 3He ions, and associated asymmetry in space and momentum, may be key for flow drive.",
    author = "Y. Lin and P. Mantica and T. Hellsten and V. Kiptily and E. Lerche and M.F.F. Nave and J.E. Rice and {Van Eester}, D. and {De Vries}, P.C. and R. Felton and C. Giroud and Tuomas Tala and contributors, {JET EFDA}",
    year = "2012",
    doi = "10.1088/0741-3335/54/7/074001",
    language = "English",
    volume = "54",
    journal = "Plasma Physics and Controlled Fusion",
    issn = "0741-3335",
    publisher = "Institute of Physics IOP",
    number = "7",

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    Lin, Y, Mantica, P, Hellsten, T, Kiptily, V, Lerche, E, Nave, MFF, Rice, JE, Van Eester, D, De Vries, PC, Felton, R, Giroud, C, Tala, T & contributors, JETEFDA 2012, 'Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET', Plasma Physics and Controlled Fusion, vol. 54, no. 7, 074001. https://doi.org/10.1088/0741-3335/54/7/074001

    Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET. / Lin, Y.; Mantica, P.; Hellsten, T.; Kiptily, V.; Lerche, E.; Nave, M.F.F.; Rice, J.E.; Van Eester, D.; De Vries, P.C.; Felton, R.; Giroud, C.; Tala, Tuomas; contributors, JET EFDA.

    In: Plasma Physics and Controlled Fusion, Vol. 54, No. 7, 074001, 2012.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Ion cyclotron range of frequency mode conversion flow drive in D(3He) plasmas on JET

    AU - Lin, Y.

    AU - Mantica, P.

    AU - Hellsten, T.

    AU - Kiptily, V.

    AU - Lerche, E.

    AU - Nave, M.F.F.

    AU - Rice, J.E.

    AU - Van Eester, D.

    AU - De Vries, P.C.

    AU - Felton, R.

    AU - Giroud, C.

    AU - Tala, Tuomas

    AU - contributors, JET EFDA

    PY - 2012

    Y1 - 2012

    N2 - Ion cyclotron range of frequency (ICRF) mode conversion has been shown to drive toroidal flow in JET D(3He) L-mode plasmas: Bt0 = 3.45 T, ne0 ~ 3 × 1019 m−3, Ip = 2.8 and 1.8 MA, PRF ≤ 3 MW at 33 MHz and −90° phasing. Central toroidal rotation in the counter-Ip direction, with ωphiv0 up to 10 krad s−1 (Vphiv0 ~ 30 km s−1, central thermal Mach number Mth (0) ~ 0.07 and Alfvén Mach number MA (0) ~ 0.003) has been observed. The flow drive effect is sensitive to the 3He concentration and the largest rotation is observed in the range X[3He] = nHe3/ne ~ 10–17%. The rotation profile is peaked near the magnetic axis, and the central rotation scales with the input RF power. The effective torque density profile from the RF power has been calculated and the total torque is estimated to be as high as 50% of the same power from neutral beam injection, and a factor of 5 larger than the direct momentum injection from the RF waves. RF physics modeling using the TORIC code shows that the interaction between the mode converted ion cyclotron wave and the 3He ions, and associated asymmetry in space and momentum, may be key for flow drive.

    AB - Ion cyclotron range of frequency (ICRF) mode conversion has been shown to drive toroidal flow in JET D(3He) L-mode plasmas: Bt0 = 3.45 T, ne0 ~ 3 × 1019 m−3, Ip = 2.8 and 1.8 MA, PRF ≤ 3 MW at 33 MHz and −90° phasing. Central toroidal rotation in the counter-Ip direction, with ωphiv0 up to 10 krad s−1 (Vphiv0 ~ 30 km s−1, central thermal Mach number Mth (0) ~ 0.07 and Alfvén Mach number MA (0) ~ 0.003) has been observed. The flow drive effect is sensitive to the 3He concentration and the largest rotation is observed in the range X[3He] = nHe3/ne ~ 10–17%. The rotation profile is peaked near the magnetic axis, and the central rotation scales with the input RF power. The effective torque density profile from the RF power has been calculated and the total torque is estimated to be as high as 50% of the same power from neutral beam injection, and a factor of 5 larger than the direct momentum injection from the RF waves. RF physics modeling using the TORIC code shows that the interaction between the mode converted ion cyclotron wave and the 3He ions, and associated asymmetry in space and momentum, may be key for flow drive.

    U2 - 10.1088/0741-3335/54/7/074001

    DO - 10.1088/0741-3335/54/7/074001

    M3 - Article

    VL - 54

    JO - Plasma Physics and Controlled Fusion

    JF - Plasma Physics and Controlled Fusion

    SN - 0741-3335

    IS - 7

    M1 - 074001

    ER -