Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus

S. P. Gerhardt; D. P. Brennan; R. Buttery; R. J. La Haye; S. Sabbagh; E. Strait; M. Bell; R. Bell; E. Fredrickson; D. Gates; B. Leblanc; J. Menard; D. Stutman; K. Tritz; H. Yuh

doi:10.1088/0029-5515/49/3/032003

Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus

S. P. Gerhardt, D. P. Brennan, R. Buttery, R. J. La Haye, S. Sabbagh, E. Strait, M. Bell, R. Bell, E. Fredrickson, D. Gates, B. Leblanc, J. Menard, D. Stutman, K. Tritz, H. Yuh

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Abstract

The onset conditions for the m/n = 2/1 neoclassical tearing mode are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX (Ono M. et al 2000 Nucl. Fusion 40 557). There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.

Original language	English (US)
Article number	032003
Journal	Nuclear Fusion
Volume	49
Issue number	3
DOIs	https://doi.org/10.1088/0029-5515/49/3/032003
State	Published - 2009

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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Gerhardt, S. P., Brennan, D. P., Buttery, R., La Haye, R. J., Sabbagh, S., Strait, E., Bell, M., Bell, R., Fredrickson, E., Gates, D., Leblanc, B., Menard, J., Stutman, D., Tritz, K., & Yuh, H. (2009). Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus. Nuclear Fusion, 49(3), Article 032003. https://doi.org/10.1088/0029-5515/49/3/032003

@article{4c8fee04adde47349a0c8fc7b7cb6c27,

title = "Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus",

abstract = "The onset conditions for the m/n = 2/1 neoclassical tearing mode are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX (Ono M. et al 2000 Nucl. Fusion 40 557). There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.",

author = "Gerhardt, \{S. P.\} and Brennan, \{D. P.\} and R. Buttery and \{La Haye\}, \{R. J.\} and S. Sabbagh and E. Strait and M. Bell and R. Bell and E. Fredrickson and D. Gates and B. Leblanc and J. Menard and D. Stutman and K. Tritz and H. Yuh",

year = "2009",

doi = "10.1088/0029-5515/49/3/032003",

language = "English (US)",

volume = "49",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "3",

}

Gerhardt, SP, Brennan, DP, Buttery, R, La Haye, RJ, Sabbagh, S, Strait, E, Bell, M, Bell, R, Fredrickson, E, Gates, D , Leblanc, B , Menard, J, Stutman, D, Tritz, K & Yuh, H 2009, 'Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus', Nuclear Fusion, vol. 49, no. 3, 032003. https://doi.org/10.1088/0029-5515/49/3/032003

TY - JOUR

T1 - Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus

AU - Gerhardt, S. P.

AU - Brennan, D. P.

AU - Buttery, R.

AU - La Haye, R. J.

AU - Sabbagh, S.

AU - Strait, E.

AU - Bell, M.

AU - Bell, R.

AU - Fredrickson, E.

AU - Gates, D.

AU - Leblanc, B.

AU - Menard, J.

AU - Stutman, D.

AU - Tritz, K.

AU - Yuh, H.

PY - 2009

Y1 - 2009

N2 - The onset conditions for the m/n = 2/1 neoclassical tearing mode are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX (Ono M. et al 2000 Nucl. Fusion 40 557). There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.

AB - The onset conditions for the m/n = 2/1 neoclassical tearing mode are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX (Ono M. et al 2000 Nucl. Fusion 40 557). There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.

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DO - 10.1088/0029-5515/49/3/032003

M3 - Article

AN - SCOPUS:63649112854

SN - 0029-5515

VL - 49

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 3

M1 - 032003

ER -

Relationship between onset thresholds, trigger types and rotation shear for the m/n = 2/1 neoclassical tearing mode in a high-β spherical torus

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