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Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas. / Castaldo, C.; Di Siena, A.; Fedele, R. et al.
In: Nuclear Fusion, Vol. 56, No. 1, 016003, 25.11.2015.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Castaldo, C, Di Siena, A, Fedele, R, Napoli, F, Amicucci, L, Cesario, R & Schettini, G 2015, 'Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas', Nuclear Fusion, vol. 56, no. 1, 016003. https://doi.org/10.1088/0029-5515/56/1/016003

APA

Castaldo, C., Di Siena, A., Fedele, R., Napoli, F., Amicucci, L., Cesario, R., & Schettini, G. (2015). Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas. Nuclear Fusion, 56(1), Article 016003. https://doi.org/10.1088/0029-5515/56/1/016003

Vancouver

Castaldo C, Di Siena A, Fedele R, Napoli F, Amicucci L, Cesario R et al. Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas. Nuclear Fusion. 2015 Nov 25;56(1):016003. doi: 10.1088/0029-5515/56/1/016003

Author

Castaldo, C. ; Di Siena, A. ; Fedele, R. et al. / Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas. In: Nuclear Fusion. 2015 ; Vol. 56, No. 1.

Bibtex

@article{936a8d48f2bc42acbdbe521bead6207e,
title = "Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas",
abstract = "Parametric instabilities induced at the plasma edge by lower hybrid wave power externally coupled to tokamak plasmas have, via broadening of the antenna spectrum, strong influence on the power deposition and current drive in the core. For modeling the parametric instabilities at the tokamak plasma edge in lower hybrid current drive experiments, the effect of the collisions has been neglected so far. In the present work, a specific collisional parametric dispersion relation, useful to analyze these nonlinear phenomena near the lower hybrid antenna mouth, is derived for the first time, based on a kinetic model. Numerical solutions show that in such cold plasma regions the collisions prevent the onset of the parametric instabilities. This result is important for present lower hybrid current drive experiments, as well as in fusion reactor scenarios.",
keywords = "lower hybrid waves, lower hybrid current drive, parametric instabilities",
author = "C. Castaldo and {Di Siena}, A. and R. Fedele and Francesco Napoli and L. Amicucci and R. Cesario and G. Schettini",
year = "2015",
month = nov,
day = "25",
doi = "10.1088/0029-5515/56/1/016003",
language = "English",
volume = "56",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "INT ATOMIC ENERGY AGENCY",
number = "1",

}

RIS

TY - JOUR

T1 - Influence of collisions on parametric instabilities induced by lower hybrid waves in tokamak plasmas

AU - Castaldo, C.

AU - Di Siena, A.

AU - Fedele, R.

AU - Napoli, Francesco

AU - Amicucci, L.

AU - Cesario, R.

AU - Schettini, G.

PY - 2015/11/25

Y1 - 2015/11/25

N2 - Parametric instabilities induced at the plasma edge by lower hybrid wave power externally coupled to tokamak plasmas have, via broadening of the antenna spectrum, strong influence on the power deposition and current drive in the core. For modeling the parametric instabilities at the tokamak plasma edge in lower hybrid current drive experiments, the effect of the collisions has been neglected so far. In the present work, a specific collisional parametric dispersion relation, useful to analyze these nonlinear phenomena near the lower hybrid antenna mouth, is derived for the first time, based on a kinetic model. Numerical solutions show that in such cold plasma regions the collisions prevent the onset of the parametric instabilities. This result is important for present lower hybrid current drive experiments, as well as in fusion reactor scenarios.

AB - Parametric instabilities induced at the plasma edge by lower hybrid wave power externally coupled to tokamak plasmas have, via broadening of the antenna spectrum, strong influence on the power deposition and current drive in the core. For modeling the parametric instabilities at the tokamak plasma edge in lower hybrid current drive experiments, the effect of the collisions has been neglected so far. In the present work, a specific collisional parametric dispersion relation, useful to analyze these nonlinear phenomena near the lower hybrid antenna mouth, is derived for the first time, based on a kinetic model. Numerical solutions show that in such cold plasma regions the collisions prevent the onset of the parametric instabilities. This result is important for present lower hybrid current drive experiments, as well as in fusion reactor scenarios.

KW - lower hybrid waves

KW - lower hybrid current drive

KW - parametric instabilities

U2 - 10.1088/0029-5515/56/1/016003

DO - 10.1088/0029-5515/56/1/016003

M3 - Journal article

VL - 56

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 1

M1 - 016003

ER -