Mechanisms for generating toroidal rotation in tokamaks without external momentum input

W.M. Solomon, K.H. Burrell, A.M. Garofalo, Tuomas Tala, S.M. Kaye, R.E. Bell, A.J. Cole, J.S. deGrassie, P.H. Diamond, T.S. Hahm, G.L. Jackson, M.J. Lanctot, C.C. Petty, H. Reimerdes, S.A. Sabbagh, E.J. Strait, R.E. Waltz

    Research output: Contribution to journalArticleScientificpeer-review

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    Abstract

    Recent experiments on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] have focused on investigating mechanisms of driving rotation in fusion plasmas. The so-called intrinsic rotation is generated by an effective torque, driven by residual stresses in the plasma, which appears to originate in the plasma edge. A clear scaling of this intrinsic drive with the H-mode pressure gradient is observed. Coupled with the experimentally inferred pinch of angular momentum, such an edge source is capable of producing sheared rotation profiles. Intrinsic drive is also possible directly in the core, although the physics mechanisms are much more complex. Another option which is being explored is the use of nonresonant magnetic fields for spinning the plasma. It is found beneficially that the torque from these fields can be enhanced at low rotation, which assists in spinning the plasma from rest, and offers increased resistance against plasma slowing.
    Original languageEnglish
    Article number056108
    JournalPhysics of Plasmas
    Volume17
    Issue number5
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

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    momentum
    fusion
    metal spinning
    torque
    pressure gradients
    residual stress
    angular momentum
    scaling
    physics
    profiles
    magnetic fields

    Cite this

    Solomon, W. M., Burrell, K. H., Garofalo, A. M., Tala, T., Kaye, S. M., Bell, R. E., ... Waltz, R. E. (2010). Mechanisms for generating toroidal rotation in tokamaks without external momentum input. Physics of Plasmas, 17(5), [056108]. https://doi.org/10.1063/1.3328521
    Solomon, W.M. ; Burrell, K.H. ; Garofalo, A.M. ; Tala, Tuomas ; Kaye, S.M. ; Bell, R.E. ; Cole, A.J. ; deGrassie, J.S. ; Diamond, P.H. ; Hahm, T.S. ; Jackson, G.L. ; Lanctot, M.J. ; Petty, C.C. ; Reimerdes, H. ; Sabbagh, S.A. ; Strait, E.J. ; Waltz, R.E. / Mechanisms for generating toroidal rotation in tokamaks without external momentum input. In: Physics of Plasmas. 2010 ; Vol. 17, No. 5.
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    title = "Mechanisms for generating toroidal rotation in tokamaks without external momentum input",
    abstract = "Recent experiments on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] have focused on investigating mechanisms of driving rotation in fusion plasmas. The so-called intrinsic rotation is generated by an effective torque, driven by residual stresses in the plasma, which appears to originate in the plasma edge. A clear scaling of this intrinsic drive with the H-mode pressure gradient is observed. Coupled with the experimentally inferred pinch of angular momentum, such an edge source is capable of producing sheared rotation profiles. Intrinsic drive is also possible directly in the core, although the physics mechanisms are much more complex. Another option which is being explored is the use of nonresonant magnetic fields for spinning the plasma. It is found beneficially that the torque from these fields can be enhanced at low rotation, which assists in spinning the plasma from rest, and offers increased resistance against plasma slowing.",
    author = "W.M. Solomon and K.H. Burrell and A.M. Garofalo and Tuomas Tala and S.M. Kaye and R.E. Bell and A.J. Cole and J.S. deGrassie and P.H. Diamond and T.S. Hahm and G.L. Jackson and M.J. Lanctot and C.C. Petty and H. Reimerdes and S.A. Sabbagh and E.J. Strait and R.E. Waltz",
    year = "2010",
    doi = "10.1063/1.3328521",
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    journal = "Physics of Plasmas",
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    Solomon, WM, Burrell, KH, Garofalo, AM, Tala, T, Kaye, SM, Bell, RE, Cole, AJ, deGrassie, JS, Diamond, PH, Hahm, TS, Jackson, GL, Lanctot, MJ, Petty, CC, Reimerdes, H, Sabbagh, SA, Strait, EJ & Waltz, RE 2010, 'Mechanisms for generating toroidal rotation in tokamaks without external momentum input', Physics of Plasmas, vol. 17, no. 5, 056108. https://doi.org/10.1063/1.3328521

    Mechanisms for generating toroidal rotation in tokamaks without external momentum input. / Solomon, W.M.; Burrell, K.H.; Garofalo, A.M.; Tala, Tuomas; Kaye, S.M.; Bell, R.E.; Cole, A.J.; deGrassie, J.S.; Diamond, P.H.; Hahm, T.S.; Jackson, G.L.; Lanctot, M.J.; Petty, C.C.; Reimerdes, H.; Sabbagh, S.A.; Strait, E.J.; Waltz, R.E.

    In: Physics of Plasmas, Vol. 17, No. 5, 056108, 2010.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Mechanisms for generating toroidal rotation in tokamaks without external momentum input

    AU - Solomon, W.M.

    AU - Burrell, K.H.

    AU - Garofalo, A.M.

    AU - Tala, Tuomas

    AU - Kaye, S.M.

    AU - Bell, R.E.

    AU - Cole, A.J.

    AU - deGrassie, J.S.

    AU - Diamond, P.H.

    AU - Hahm, T.S.

    AU - Jackson, G.L.

    AU - Lanctot, M.J.

    AU - Petty, C.C.

    AU - Reimerdes, H.

    AU - Sabbagh, S.A.

    AU - Strait, E.J.

    AU - Waltz, R.E.

    PY - 2010

    Y1 - 2010

    N2 - Recent experiments on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] have focused on investigating mechanisms of driving rotation in fusion plasmas. The so-called intrinsic rotation is generated by an effective torque, driven by residual stresses in the plasma, which appears to originate in the plasma edge. A clear scaling of this intrinsic drive with the H-mode pressure gradient is observed. Coupled with the experimentally inferred pinch of angular momentum, such an edge source is capable of producing sheared rotation profiles. Intrinsic drive is also possible directly in the core, although the physics mechanisms are much more complex. Another option which is being explored is the use of nonresonant magnetic fields for spinning the plasma. It is found beneficially that the torque from these fields can be enhanced at low rotation, which assists in spinning the plasma from rest, and offers increased resistance against plasma slowing.

    AB - Recent experiments on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] have focused on investigating mechanisms of driving rotation in fusion plasmas. The so-called intrinsic rotation is generated by an effective torque, driven by residual stresses in the plasma, which appears to originate in the plasma edge. A clear scaling of this intrinsic drive with the H-mode pressure gradient is observed. Coupled with the experimentally inferred pinch of angular momentum, such an edge source is capable of producing sheared rotation profiles. Intrinsic drive is also possible directly in the core, although the physics mechanisms are much more complex. Another option which is being explored is the use of nonresonant magnetic fields for spinning the plasma. It is found beneficially that the torque from these fields can be enhanced at low rotation, which assists in spinning the plasma from rest, and offers increased resistance against plasma slowing.

    U2 - 10.1063/1.3328521

    DO - 10.1063/1.3328521

    M3 - Article

    VL - 17

    JO - Physics of Plasmas

    JF - Physics of Plasmas

    SN - 1527-2419

    IS - 5

    M1 - 056108

    ER -