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   Articles with "rotational transform" as a keyword



Data-driven robust control of the plasma rotational transform profile and normalized beta dynamics for advanced tokamak scenarios in DIII-D

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recommendations! Published in 2017 at "Fusion Engineering and Design"

DOI: 10.1016/j.fusengdes.2017.01.003

Abstract: Abstract A control-oriented, two-timescale, linear, dynamic, response model of the rotational transform ι profile and the normalized beta βN is proposed based on experimental data from the DIII-D tokamak. Dedicated system-identification experiments without feedback control… read more here.

Keywords: control; diii; model; rotational transform ... See more keywords

A family of quasi-axisymmetric stellarators with varied rotational transform

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recommendations! Published in 2024 at "Journal of Plasma Physics"

DOI: 10.1017/s0022377824001351

Abstract: We apply a continuation method to recently optimized stellarator equilibria with excellent quasi-axisymmetry to generate new equilibria with a wide range of rotational transform profiles. Using these equilibria, we investigate how the rotational transform affects… read more here.

Keywords: bar; growth; rotational transform; bar iota ... See more keywords

Sawtooth oscillation behavior with varying amounts of applied stellarator rotational transform

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recommendations! Published in 2019 at "Physics of Plasmas"

DOI: 10.1063/1.5080242

Abstract: Tokamak-like sawtooth oscillations are observed in the Compact Toroidal Hybrid (CTH), a current-carrying stellarator. CTH has the unique ability to change the amount of the applied vacuum rotational transform from external stellarator coils relative to… read more here.

Keywords: sawtooth oscillation; fractional rotational; rotational transform; cth ... See more keywords

Modeling of frequency-sweeping Alfvén modes in the TJ-II stellarator

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recommendations! Published in 2024 at "Nuclear Fusion"

DOI: 10.1088/1741-4326/ad1c93

Abstract: Alfvénic activity has been observed in the TJ-II stellarator which resembles the frequency sweeping demonstrated by Alfvén cascade modes in tokamaks. A numerical validation study was conducted using a reduced magnetohydrodynamic (MHD) model to show… read more here.

Keywords: rotational transform; frequency sweeping; transform profile; modeling frequency ... See more keywords