Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

J. Bizarro; X. Litaudon; Tuomas Tala

doi:10.1088/0029-5515/47/11/L03

Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

J. Bizarro
, X. Litaudon
, Tuomas Tala

Instituto de Plasmas e Fusão Nuclear (IPFN)
Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA)

Research output: Contribution to journal › Article › Scientific › peer-review

17 Citations (Scopus)

Abstract

It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

Original language	English
Pages (from-to)	L41-L45
Journal	Nuclear Fusion
Volume	47
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/47/11/L03
Publication status	Published - 2007
MoE publication type	A1 Journal article-refereed

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10.1088/0029-5515/47/11/L03

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abstract = "It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.",

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T1 - Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

AU - Bizarro, J.

AU - Litaudon, X.

AU - Tala, Tuomas

PY - 2007

Y1 - 2007

N2 - It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

AB - It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

U2 - 10.1088/0029-5515/47/11/L03

DO - 10.1088/0029-5515/47/11/L03

M3 - Article

SN - 0029-5515

VL - 47

SP - L41-L45

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 11

ER -

Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

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