Controlling sawtooth oscillations in tokamak plasmas

IT Chapman - Plasma Physics and Controlled Fusion, 2010 - iopscience.iop.org
The sawtooth instability in tokamak plasmas results in a periodic reorganization of the core
plasma. A typical sawtooth cycle consists of a quiescent period, during which the plasma …

Multiscale gyrokinetics for rotating tokamak plasmas: fluctuations, transport and energy flows

IG Abel, GG Plunk, E Wang, M Barnes… - Reports on Progress …, 2013 - iopscience.iop.org
This paper presents a complete theoretical framework for studying turbulence and transport
in rapidly rotating tokamak plasmas. The fundamental scale separations present in plasma …

Heating neutral beams for ITER: negative ion sources to tune fusion plasmas

MJ Singh, D Boilson, AR Polevoi, T Oikawa… - New Journal of …, 2017 - iopscience.iop.org
Neutral beam injection (NBI) based on a negative ion source is one of the basic heating and
current drive systems designed for ITER required to reach its goals of the operation with high …

Orchestrating TRANSP simulations for interpretative and predictive tokamak modeling with OMFIT

BA Grierson, X Yuan, M Gorelenkova… - Fusion Science and …, 2018 - Taylor & Francis
TRANSP simulations are being used in the OMFIT workflow manager to enable a machine-
independent means of experimental analysis, postdictive validation, and predictive time …

Integrated modelling of ITER reference scenarios

V Parail, P Belo, P Boerner, X Bonnin… - Nuclear …, 2009 - iopscience.iop.org
Abstract The ITER Scenario Modelling Working Group (ISM WG) is organized within the
European Task Force on Integrated Tokamak Modelling (ITM-TF). The main responsibility of …

[HTML][HTML] Predicting rotation for ITER via studies of intrinsic torque and momentum transport in DIII-D

C Chrystal, BA Grierson, GM Staebler, CC Petty… - Physics of …, 2017 - pubs.aip.org
Experiments at the DIII-D tokamak have used dimensionless parameter scans to investigate
the dependencies of intrinsic torque and momentum transport in order to inform a prediction …

Parametric dependences of momentum pinch and Prandtl number in JET

T Tala, A Salmi, C Angioni, FJ Casson… - Nuclear …, 2011 - iopscience.iop.org
Several parametric scans have been performed to study momentum transport on JET. A
neutral beam injection modulation technique has been applied to separate the diffusive and …

Comparisons of predicted plasma performance in ITER H-mode plasmas with various mixes of external heating

RV Budny - Nuclear Fusion, 2009 - iopscience.iop.org
Performance in H-mode DT plasmas in ITER with various choices of heating systems are
predicted and compared. Combinations of external heating by negative ion neutral beam …

Predicting the rotation profile in ITER

C Chrystal, BA Grierson, SR Haskey, AC Sontag… - Nuclear …, 2020 - iopscience.iop.org
Determining the toroidal rotation for future tokamaks like ITER is a challenging and important
problem. By combining empirical scalings for the intrinsic rotation at the top of the pedestal …

Collisionality scaling of main-ion toroidal and poloidal rotation in low torque DIII-D plasmas

BA Grierson, KH Burrell, WM Solomon… - Nuclear …, 2013 - iopscience.iop.org
In tokamak plasmas with low levels of toroidal rotation, the radial electric field E r is a
combination of pressure gradient and toroidal and poloidal rotation components, all having …