Precise stellarator quasi-symmetry can be achieved with electromagnetic coils

F Wechsung, M Landreman… - Proceedings of the …, 2022 - National Acad Sciences
Magnetic fields with quasi-symmetry are known to provide good confinement of charged
particles and plasmas, but the extent to which quasi-symmetry can be achieved in practice …

Radiative pulsed L-mode operation in ARC-class reactors

SJ Frank, CJ Perks, AO Nelson, T Qian, S Jin… - Nuclear …, 2022 - iopscience.iop.org
A new ARC-class, highly-radiative, pulsed, L-mode, burning plasma scenario is developed
and evaluated as a candidate for future tokamak reactors. Pulsed inductive operation …

Conceptual design of the LHCD system on CFETR

L Liu, Y Yang, M Li, L Zhao, W Ma, C Liu… - Fusion Engineering and …, 2023 - Elsevier
With the capability of saving flux consumption in the current ramp up phase, controlling the
safety factor (q) profile, providing the required off-axis current drive (CD), a lower hybrid …

A hybrid full-wave Markov chain approach to calculating radio-frequency wave scattering from scrape-off layer filaments

B Biswas, S Shiraiwa, SG Baek, P Bonoli… - Journal of Plasma …, 2021 - cambridge.org
The interaction of radio-frequency (RF) waves with edge turbulence modifies the incident
wave spectrum, and can significantly affect RF heating and current drive in tokamaks …

Study of turbulence-induced refraction of lower hybrid waves using synthetic scrape-off layer filaments

B Biswas, SG Baek, P Bonoli, S Shiraiwa… - Plasma Physics and …, 2020 - iopscience.iop.org
Turbulence-induced refraction effects to lower hybrid (LH) wave propagation and current
drive are studied using synthetic scrape-off layer (SOL) blob/filament fields. A synthetic 3D …

Observation and analysis of lower-hybrid-current-drive density limit in EAST

MH Li, SG Baek, GM Wallace, BJ Ding, CB Wu… - Nuclear …, 2022 - iopscience.iop.org
Lower hybrid current drive (LHCD) experiments with line-averaged density up to∼ 5.1× 10
19 m− 3 were performed in EAST L-mode plasmas. When the line-averaged density rises …

Experimental evidence of lower hybrid wave scattering in Alcator C-Mod due to scrape off layer density fluctuations

EH Martin, C Lau, GM Wallace, S Shiraiwa… - Nuclear …, 2019 - iopscience.iop.org
Novel experimental measurements of the lower hybrid (LH) wave electric field vector, E LH,
obtained in Alcator C-Mod using dynamic Stark spectroscopy are presented. Three key …

Lower hybrid wave absorption study to improve the calculation of energy confinement time in EAST

X Gu, B Shen, M Li, J Qian, D Moreau, S Ding… - Physics of …, 2018 - pubs.aip.org
The auxiliary heating power absorption of 2.45 GHz and 4.6 GHz lower hybrid (LH) waves in
EAST is analysed in order to improve the determination of the energy confinement time. The …

A model investigation of the impact of lower hybrid wave scattering angle on current drive profile in EAST and Alcator C-Mod

SG Baek, B Biswas, GM Wallace, PT Bonoli… - Nuclear …, 2021 - iopscience.iop.org
Lower hybrid current drive (LHCD) is beneficial for developing a steady-state operation
scenario in a tokamak. This paper conducts a modeling investigation to identify an optimum …

Full-wave model for the lower hybrid wave electric field vector with synthetic turbulence on Alcator C-Mod

C Lau, EH Martin, S Shiraiwa, GM Wallace - Nuclear Fusion, 2020 - iopscience.iop.org
The effects of synthetic turbulence on lower hybrid (LH) wave field magnitude and
polarization are studied on Alcator C-Mod. Three synthetic turbulence models are evaluated …