Results 31 to 40 of about 3,463,479 (362)

Fusion, magnetic confinement [PDF]

, 1992
An overview is presented of the principles of magnetic confinement of plasmas for the purpose of achieving controlled fusion conditions. Sec. 1 discusses the different nuclear fusion reactions which can be exploited in prospective fusion reactors and explains why special technologies need to be developed for the supply of tritium or {sup 3}He, the ...
openaire   +4 more sources

Experimental study of electron cyclotron heating assisted start-up on J-TEXT

Nuclear Fusion, 2023
Second harmonic X-mode (X2 mode) electron cyclotron heating (ECH) assisted start-up has been studied experimentally on the J-TEXT device to determine the minimum ECH power requirements to assist breakdown and develop a better physical description of the ...
Junli Zhang, Peter C de Vries, Kazunobu Nagasaki, Donghui Xia, Wei Jiang, Zhoujun Yang, Zhifeng Cheng, Li Gao, Xin Xu, Zhijiang Wang, Nengchao Wang, Yonghua Ding, Zhipeng Chen, Zhongyong Chen, Yuan Pan, J-TEXT Team   +15 more
doaj   +1 more source

Refining light impurity content estimates at the lower divertor based on experimental data in WEST

Nuclear Materials and Energy, 2023
WEST is an actively cooled, long-pulse tokamak with nearly all plasma-facing components (PFC) made of tungsten (W). One of the aims of WEST is to study plasma operation with W PFCs in preparation for long-pulse operation on W divertor devices like ITER ...
A. Grosjean, D.C. Donovan, C.A. Johnson, J.P. Gunn, C. Guillemaut, N. Fedorczak, C.C. Klepper, E.A. Unterberg   +7 more
doaj   +1 more source

Experimental and numerical modeling of plasma start-up assisted by electron drift injection on J-TEXT

Nuclear Fusion, 2023
Start-up is one of the critical phases for tokamak discharge. The electron drift injection (EDI) system has been developed on J-TEXT for start-up studies.
Junli Zhang, Zhifeng Cheng, Yanli Peng, Zhoujun Yang, Kazunobu Nagasaki, Nengchao Wang, Hao Cai, Yonghua Ding, Zhipeng Chen, Zhongyong Chen, Wei Jiang, Donghui Xia, Zhijiang Wang, Yuan Pan, J-TEXT team   +14 more
doaj   +1 more source

Magnetic control of tokamak plasmas through deep reinforcement learning

Nature, 2022
Nuclear fusion using magnetic confinement, in particular in the tokamak configuration, is a promising path towards sustainable energy. A core challenge is to shape and maintain a high-temperature plasma within the tokamak vessel.
Jonas Degrave, F. Felici, J. Buchli, M. Neunert, Brendan D. Tracey, F. Carpanese, T. Ewalds, Roland Hafner, A. Abdolmaleki, D. de Las Casas, Craig Donner, Leslie Fritz, C. Galperti, Andrea Huber, James Keeling, M. Tsimpoukelli, Jackie Kay, A. Merle, J. Moret, Seb Noury, F. Pesamosca, D. Pfau, O. Sauter, C. Sommariva, S. Coda, B. Duval, A. Fasoli, Pushmeet Kohli, K. Kavukcuoglu, D. Hassabis, Martin A. Riedmiller   +30 more
semanticscholar   +1 more source

Calorimetry measurement for energy balance and energy distribution in WEST for L-mode plasmas

Nuclear Fusion
This paper presents the energy balance of 602 pulses from four different experimental campaigns for the WEST tokamak. Different magnetic configurations have been studied, with lower single null (LSN) and upper single null (USN) configuration with ...
J. Gaspar, J. Gerardin, Y. Corre, J. Daumas, N. Fedorczak, V. Lamaison, C. Bourdelle, G. Ciraolo, A. Ekedahl, A. Gallo, N. Rivals, E. Tsitrone, the WEST Team   +12 more
doaj   +1 more source

Identification of a double decay length (λqt) heat flux deposition shape with embedded thermal measurement and neural network

Nuclear Materials and Energy
The estimation of the heat flux density distribution profiles in tokamak devices is a very important research topic for edge plasma physics purposes and also to ensure the safety of the machine.
Y. Anquetin, J. Gaspar, Y. Corre, JL. Gardarein, J. Gerardin, P. Malard, F. Rigollet, Q. Tichit, E. Tsitrone   +8 more
doaj   +1 more source

Corrosion behavior of diverse sputtered coatings for the helium cooled pebbles bed (HCPB) breeder concept

Nuclear Materials and Energy, 2020
The present paper studies the corrosion behavior of several sputtered coatings (nanostructured W, SiC and Al2O3) under the working conditions expected for the helium cooled pebbles bed breeder concept to be used in future nuclear fusion reactors. To this
T. Hernández, F.J. Sánchez, A. Moroño, E. León-Gutiérrez, M. Panizo-Laiz, M.A. Monclus, R. González-Arrabal   +6 more
doaj   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source