Development of a generic multipurpose tokamak plasma discharge flight simulator

Moreau, Philippe; Brémond, S.; Ravenel, N.; Mannori, Simone; Barana, O.; Pastor, P.; Saint‐Laurent, F.; Imbeaux, F.; Guillerminet, B.; Bayetti, P.

doi:10.1016/j.fusengdes.2011.01.013

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…The unique know-how developed on Tore Supra for safety and plasma performance RT control is being capitalized by developing, under the European integrated tokamak modelling framework, a plasma discharge 'flight simulator', for control algorithm development [18]. Two main modes of operation have been identified according to the step-by-step process needed to develop new control algorithms.…”

Section: Towards a Plasma Discharge Flight Simulatormentioning

confidence: 99%

Contribution of Tore Supra in preparation of ITER

et al. 2011

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Tore Supra routinely addresses the physics and technology of very long duration plasma discharges, thus bringing precious information on critical issues of long pulse operation of ITER. A new ITER relevant LHCD launcher has allowed coupling to the plasma a power level of 2.7 MW for 78 s, corresponding to a power density close to the design value foreseen for an ITER LHCD system. In accordance with the expectations, long distance (10 cm) power coupling has been obtained. Successive stationary states of the plasma current profile have been controlled in real time featuring i) control of sawteeth with varying plasma parameters, ii) obtaining and sustaining a "hot core" plasma regime, iii) recovery from a voluntarily triggered deleterious MHD regime. The SOL parameters and power deposition have been documented during L-mode ramp-up phase, a crucial point for ITER before the X-point formation. Disruption mitigation studies have been conducted with massive gas injection, evidencing the difference between He and Ar and the possible role of the q=2 surface in limiting the gas penetration. ICRF assisted wall conditioning in the presence of magnetic field has been investigated, culminating in the demonstration that this conditioning scheme allows to recover normal operation after disruptions. Effect of the magnetic field ripple on the intrinsic plasma rotation has been studied, showing the competition between turbulent transport processes and ripple toroidal friction. During dedicated dimensionless experiments, the effect of varying the collisionality on turbulence wavenumber spectra has been documented, giving new insight into the turbulence mechanism. Turbulence measurements have also allowed quantitatively comparing experimental results to predictions by 5D gyrokinetic codes: numerical results simultaneously match the magnitude of effective heat diffusivity, rms values of density fluctuations, and wave-number spectra. A clear correlation between electron temperature gradient and impurity transport in the very core of the plasma has been observed, strongly suggesting the existence of a threshold above which transport is dominated by turbulent electron modes. Dynamics of edge turbulent fluctuations has been studied by correlating data from fast imaging cameras and Langmuir probes, yielding a coherent picture of transport processes involved in the SOL.

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Section: Towards a Plasma Discharge Flight Simulatormentioning

confidence: 99%

Contribution of Tore Supra in preparation of ITER

et al. 2011

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“…The project is named WEST for W Environment in Superconducting Tokamaks ( [10], submitted for publication). Two sets of in-vessel coils would be implemented, at the top and bottom of the vessel.…”

Section: Vertical Stability Studies For the W Environment In Superconmentioning

confidence: 99%

“…6. This calculation, which makes use of the recently implemented capability to deal with iron in CEDRES++, was compared to an identical PROTEUS [11] calculation with good agreement between the two codes (<2% difference between the separatrices normalized to the minor radius).…”

Section: Vertical Stability Studies For the W Environment In Superconmentioning

confidence: 99%