Integrated ELM Modelling

Lönnroth, J.; Bateman, G.; Bécoulet, M.; Beyer, Peter; Corrigan, G.; Figarella, C.; Fundamenski, W.; Garcia, Odd Erik; Garbet, X.; Huysmans, G.; Janeschitz, G.; Johnson, T.; Kiviniemi, Timo; Kühn, S.; Kritz, A.H.; Loarte, A.; Naulin, V.; Nave, M. F. F.; Onjun, T.; Pacher, G.W.; Pacher, H.D.; Pankin, A.Y.; Parail, V.; Pitts, R.A.; Saibene, G.; Snyder, P. B.; Spence, James; Tskhakaya, D.; Wilson, H. R.

doi:10.1002/ctpp.200610070

Cited by 11 publications

(19 citation statements)

References 53 publications

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“…Heat and particle diffusivities in the five-point model are set equal to those values at the separatrix in TOPICS. The localization of ELMs at the low-field side midplane and the filamentary structure [9] are not taken into account in the present model, as the same in other integrated codes [5][6][7][8].…”

Section: Sol Modelmentioning

confidence: 99%

“…This integrated code is one of the effective methods to study the self-consistent ELM behavior [5][6][7][8], while the nonlinear simulation [9,10] is a fundamental method requiring large computational resources. The integrated codes couple with ELM models, which consists of the edge transport and the stability.…”

Section: Introductionmentioning

confidence: 99%

“…The integrated codes couple with ELM models, which consists of the edge transport and the stability. For example, the JETTO integrated code clarified the interplay between ballooning and peeling modes in the ELM crash [6]. These studies dealt with the ELM behavior without the dynamic response of SOL plasmas.…”

Section: Introductionmentioning

confidence: 99%

“…The SOL plasma transport is, however, important for the ELM behavior because the SOL plasma affects boundary conditions of the core transport. Indeed, the edge boundary conditions at the separatrix were found to affect the ELM behavior in the integrated simulation [6]. An appropriate SOL model is required for the integrated modeling.…”

Section: Introductionmentioning

confidence: 99%

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Integrated simulation of ELM energy loss determined by pedestal MHD and SOL transport

Hayashi¹,

Takizuka²,

Ozeki³

et al. 2007

Nucl. Fusion

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Abstract. An integrated simulation code TOPICS-IB based on a transport code with a stability code for the peeling-ballooning modes and a scrape-off-layer (SOL) model has been developed to clarify self-consistent effects of edge localized modes (ELMs) and SOL on the plasma performance. Experimentally observed collisionality dependence of the ELM energy loss is found to be caused by both the edge bootstrap current and the SOL transport. The bootstrap current decreases with increasing the collisionality and intensifies the magnetic shear at the pedestal region. The increase of the magnetic shear reduces the width of eigenfunctions of unstable modes, which results in the reduction of the area and the edge value near the separatrix of the ELM enhanced transport. On the other hand, when an ELM crash occurs, the energy flows into the SOL and the SOL temperature rapidly increases. The increase of the SOL temperature lowers the ELM energy loss due to the flattening of the radial edge gradient. The parallel electron heat conduction determines how the SOL temperature increases. For higher collisionality, the conduction becomes lower and the SOL electron temperature increases more. By the above two mechanisms, the ELM energy loss decreases with increasing the collisionality. The bootstrap current and the SOL transport have the major effect on the collisionality dependence.

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Section: Sol Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integrated simulation of ELM energy loss determined by pedestal MHD and SOL transport

Hayashi¹,

Takizuka²,

Ozeki³

et al. 2007

Nucl. Fusion

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“…Recent investigations have shown (see e.g. [1], [2]) that these "classical" kinetic models are no longer appropriate during transient processes such as ELMs. Below, this set of boundary conditions and limiting factors we call kinetic factors (KF).…”

Section: Introductionmentioning

confidence: 99%

On Kinetic Effects during Parallel Transport in the SOL

Tskhakaya

Subba

Bonnin

et al. 2008

Contrib. Plasma Phys.

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Integrated ELM Simulation with Edge MHD Stability and Transport of SOL‐Divertor Plasmas

Hayashi

Takizuka

Aiba

et al. 2008

Contrib. Plasma Phys.

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The effect of the pressure profile on the energy loss caused by edge localized modes (ELMs) has been investigated by using an integrated simulation code TOPICS-IB based on a core transport code with a stability code for the peeling-ballooning modes and a transport model for scrape-off-layer and divertor plasmas. The steep pressure gradient inside the pedestal top is found to broaden the region of the ELM enhanced transport through the broadening of eigenfunctions and enhance the ELM energy loss. The ELM energy loss in the simulation becomes larger than 15 % of the pedestal energy, as is shown in the database of multi-machine experiments.

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Integrated ELM Modelling

Cited by 11 publications

References 53 publications

Integrated simulation of ELM energy loss determined by pedestal MHD and SOL transport

Integrated simulation of ELM energy loss determined by pedestal MHD and SOL transport

On Kinetic Effects during Parallel Transport in the SOL

Integrated ELM Simulation with Edge MHD Stability and Transport of SOL‐Divertor Plasmas

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