Michail Savvas Anastopoulos Tzanis
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View article: Validation of the GFS model for Gyrokinetic Stability of NSTX Pedestal Data
Validation of the GFS model for Gyrokinetic Stability of NSTX Pedestal Data Open
This study presents a large database validation of the Gyro Fluid System (GFS) model for linear gyrokinetic stability for high-mode (H-mode) edge transport barrier conditions in the National Spherical Torus Experiment (NSTX) tokamak. The d…
View article: The impact of kinetic and global effects on ballooning 2nd stable pedestals of conventional and low aspect ratio tokamaks
The impact of kinetic and global effects on ballooning 2nd stable pedestals of conventional and low aspect ratio tokamaks Open
The EPED model [P.B. Snyder et al 2011 Nucl. Fusion 51 103016] had success describing the pedestals of the Type-I ELM and QH-mode operations in conventional tokamaks, by combining kinetic ballooning mode (KBM) and peeling-ballooning (PB) c…
View article: Doubling fusion power with volumetric optimization in magnetic confinement fusion devices
Doubling fusion power with volumetric optimization in magnetic confinement fusion devices Open
A technique, volumetric power optimization, is presented for enhancing the power output of magnetic confinement fusion devices. Applied to a tokamak, this approach involves shifting the burning plasma region to a larger plasma volume while…
View article: Overview of recent results from the ST40 compact high-field spherical tokamak
Overview of recent results from the ST40 compact high-field spherical tokamak Open
ST40 is a compact, high-field ( ) spherical tokamak (ST) with a mission to expand the physics and technology basis for the ST route to commercial fusion. The ST40 research programme covers confinement and stability; solenoid-fre…
View article: Doubling Fusion Power with Volumetric Optimization in Magnetic Confinement Fusion Devices
Doubling Fusion Power with Volumetric Optimization in Magnetic Confinement Fusion Devices Open
A technique, volumetric power optimization, is presented for enhancing the power output of magnetic confinement fusion devices. Applied to a tokamak, this approach involves shifting the burning plasma region to a larger plasma volume while…
View article: Linear instabilities in the hot-ion regime in a high-field spherical tokamak
Linear instabilities in the hot-ion regime in a high-field spherical tokamak Open
The present operating high-field compact spherical tokamak ST40 is an important step toward an ST-based fusion reactor (Gryaznevich and Asunta 2017 Fusion Eng. Des. 123 177; McNamara 2023 Nucl. Fusion 63 054002). Temperature and density pr…
View article: Extended electron tails in electrostatic microinstabilities and the nonadiabatic response of passing electrons
Extended electron tails in electrostatic microinstabilities and the nonadiabatic response of passing electrons Open
Ion-gyroradius-scale microinstabilities typically have a frequency comparable to the ion transit frequency. Due to the small electron-to-ion mass ratio and the large electron transit frequency, it is conventionally assumed that passing ele…
View article: TDoTP High-Beta ST Plasma Equilibria
TDoTP High-Beta ST Plasma Equilibria Open
This folder contains high-\(\beta\) ST plasma equilibria created and used within the TDoTP plasma group. The three (3) available equlibria are: 1)High q0: positive triangularity ST plasma shape with high q0 at the plasma core 2)Low q0: pos…
View article: TDoTP High-Beta ST Plasma Equilibria
TDoTP High-Beta ST Plasma Equilibria Open
This folder contains high-\(\beta\) ST plasma equilibria created and used within the TDoTP plasma group. The three (3) available equlibria are: 1)High q0: positive triangularity ST plasma shape with high q0 at the plasma core 2)Low q0: pos…
View article: TDoTP High-Beta ST Plasma Equilibria
TDoTP High-Beta ST Plasma Equilibria Open
This folder contains high-\(\beta\) ST plasma equilibria created and used within the TDoTP plasma group. The three (3) available equlibria are: 1)High q0: positive triangularity ST plasma shape with high q0 at the plasma core 2)Low q0: pos…
View article: Peeling-ballooning stability of tokamak plasmas with applied 3D magnetic fields
Peeling-ballooning stability of tokamak plasmas with applied 3D magnetic fields Open
The poloidal harmonics of the toroidal normal modes of an unstable axisymmetric tokamak plasma are employed as basis functions for the minimisation of the 3D energy functional. This approach presents a natural extension of the perturbative…
View article: Non-axisymmetric equilibrium and stability using the ELITE stability code
Non-axisymmetric equilibrium and stability using the ELITE stability code Open
Linear perturbation theory is used to model the ideal magnetohydrodynamic stability of tokamak equilibria under the application of external 3D magnetic perturbations. We use the ELITE code to produce both a linear plasma response, as well …