Concept
Bohm diffusion
Publications associées (114)
Simulating Microswimmers Under Confinement With Dissipative Particle (Hydro) Dynamics
In this work we study microwimmers, whether colloids or polymers, embedded in bulk or in confinement. We explicitly consider hydrodynamic interactions and simulate the swimmers via an implementation inspired by the squirmer model. Concerning the surroundin ...
FRONTIERS MEDIA SA2022Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X
Jieping Zhu, Jonathan Graves, Eduardo Sanchez, Joaquim Loizu Cisquella, Xiaoxue Han, Nicola Vianello, Jonathan Marc Philippe Faustin, Alberto Bottino, Emiliano Fable, Thomas Binderup Jensen, Attila Bencze, Antoine Baillod, Mike Machielsen, Michel Haas, Ajay Kumar, Shuai Liu, Hui Wang, Hartmut Zohm, Konstantinos Avramidis, Frank Rüdiger Wagner, Gregory Vogel, Sheng Xu, Adnan Ali
We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have been ...
IOP Publishing Ltd2022RF plasma simulations using the TOMATOR 1D code: a case study for TCV helium ECRH plasmas
The 1-dimensional reaction-diffusion-convection code TOMATOR-1D describes plasma production by RF waves inside a tokamak using the Braginskii continuity and heat balance equations. The model simulates self-consistent radial density and temperature profiles ...
2020Validation of the BEAMS3D neutral beam deposition model on Wendelstein 7-X
Jonathan Graves, David Pfefferlé, Mike Machielsen, Adnan Ali, Yu Gao
The neutral beam deposition model in the BEAMS3D code is validated against neutral beam attenuation data from Wendelstein 7-X (W7-X). A set of experimental discharges where the neutral beam injection system of W7-X was utilized were reconstructed. These di ...
IOP PUBLISHING LTD2020Identification of an Optimized Heating and Fast Ion Generation Scheme for the Wendelstein 7-X Stellarator
Jonathan Graves, Wilfred Anthony Cooper, David Pfefferlé, Hamish William Patten
A Doppler shifted resonance minority species ion cyclotron range of frequency (ICRF) scheme for heating neutral beam ions has been identified and optimized for theWendelstein 7-X stellarator. Compared with more conventional methods, the synergetic scheme i ...
2020