Concept
Toroidal and poloidal coordinates
Related publications (155)
Shedding light on the MRI-driven dynamo in a stratified shearing box
We study the magneto-rotational instability (MRI) dynamo in a geometrically thin disc (H/R < 1) using stratified zero net (vertical) flux shearing box simulations. We find that mean fields and electromotive forces (EMFs) oscillate with a primary frequency ...
2024Tangentially viewing phase contrast imaging for turbulence measurements in toroidal fusion devices
Phase contrast imaging (PCI) is an established and powerful technique for measuring density fluctuations in plasmas and has been successfully applied to several fusion devices. Rooted in a concept first developed for microscopy, PCI belongs to the category ...
2024DEMO toroidal field coil fast discharge unit integration studies
Roberto Guarino, Alberto Ferro
The Fast Discharge Units (FDUs) of the Superconducting (SC) Toroidal Field (TF) coils in the European demonstration fusion power plant DEMO warrant the machine integrity over its full lifetime against severe failure events, such as SC coil quenches or any ...
Elsevier Science Sa2024Occam's razor on the mechanism of resistive-wall-mode-induced beta limits in diverted tokamaks
Jonathan Graves, Daniele Brunetti
External kink modes, believed to be the drive of the 0-limiting resistive wall mode, are strongly stabilized by the presence of a separatrix. We thus propose a novel mechanism explaining the appearance of long-wavelength global instabilities in free bounda ...
2023Excitation of toroidal Alfvén eigenmodes with counter-current NBI in the TCV tokamak
Laurie Porte, Alexander Karpushov, Matteo Vallar, Samuele Mazzi
In TCV, unstable modes excited by resonant interaction between the shear Alfvèn waves in con- tinuum gaps and energetic particles have been observed in scenarios with Neutral Beam Injection (NBI). TCV is a middle-size device (R 0 /a = 0.88/0.25) equipped w ...
2023Nonlinear interaction of Alfvénic instabilities and turbulence via the modification of the equilibrium profiles
Laurent Villard, Alberto Bottino, Xiao Wang
Nonlinear simulations of Alfvén modes (AMs) driven by energetic particles (EPs) in the presence of turbulence are performed with the gyrokinetic particle-in-cell code ORB5. The AMs carry a heat flux, and consequently they nonlinearly modify the plasma temp ...
2023Vertical electron cyclotron emission diagnostic on the tokamak à configuration variable
Ambrogio Fasoli, Stefano Coda, Laurie Porte
In this paper, a diagnostic for the measurement of the electron cyclotron emission (ECE) from non-thermal electrons in magnetically confined fusion plasmas is presented. The diagnostic employs a vertical viewing line of sight that allows us to directly inf ...
2023The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall
Haomin Sun, Henri Weisen, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Mikhail Maslov
The required heating power, P-LH, to access the high confinement regime (H-mode) in tritium containing plasmas is investigated in JET with ITER-like wall at a toroidal magnetic field of B-t = 1.8 T and a plasma current of I-p = 1.7 MA. PLH, also referred t ...
IOP Publishing Ltd2023AC loss and electrical resistance of the RW3 diffusion-bonded joint
For the European DEMO fusion reactor, several options of the Toroidal Field (TF) coil design were proposed. The winding of the TF coil option 1 is based on React&Wind (RW), Nb3Sn, graded conductors in order to optimize the amount of superconductor accordin ...
2023Optimization of X-mode electron cyclotron current drive in high-electron-temperature plasma in the EAST tokamak
Joan Decker, Chunmin Zhang, Fang Liu
A discharge with electron temperature up to 14 keV has been achieved in EAST. Analysis of the electron cyclotron current drive (ECCD) efficiency at high electron temperature under EAST parameters is presented using C3PO/LUKE code. Simulation results show t ...
IOP Publishing Ltd2023