Personne
Mike Machielsen
Cette personne n’est plus à l’EPFL
Publications associées (5)
Fast ion generation with ICRF waves and beams in the Wendelstein 7-X stellarator
The largest operating stellarator, Wendelstein 7-X, is of the quasi-isodynamic type. For this design to scale up to a fusion reactor, several criteria must be met, one of them being good fast ion confinement. The latter still has to be tested experimentall ...
EPFL2023Experimental 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 Ltd2022ICRF modelling in 2D and 3D magnetic configurations using a hot plasma model
Jonathan Graves, Wilfred Anthony Cooper, Mike Machielsen
The generation of energetic trapped ions is important for experiments investigating their confinement in 3D magnetic fields, for plasma heating, for studies into unwanted drive of instabilities, and improved transport regimes. An effective way to generate ...
IOP PUBLISHING LTD2021Validation 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 LTD2020Advanced RF heating schemes in preparation for ICRF heating and fastion experiments in the W7-X stellarator
Jonathan Graves, Hamish William Patten, Mike Machielsen
Fast ion confinement is crucial for the demonstration of the stellarator approach towards fu- sion energy. To study confinement of fast ions with today’s stellarators advanced RF heating schemes can be used to generate fast ions. Secondly, advanced RF heat ...
European Physical Society2019