Results 21 to 30 of about 2,212,062 (221)

Electron‐Scale Reconnection in Three‐Dimensional Shock Turbulence

Geophysical Research Letters, Volume 49, Issue 15, 16 August 2022., 2022
Abstract Magnetic reconnection has been observed in the transition region of quasi‐parallel shocks. In this work, the particle‐in‐cell method is used to simulate three‐dimensional reconnection in a quasi‐parallel shock. The shock transition region is turbulent, leading to the formation of reconnecting current sheets with various orientations.
J. Ng, L.‐J. Chen, N. Bessho, J. Shuster, B. Burkholder, J. Yoo   +5 more
wiley   +1 more source

Transport Simulasion in a Burning Tokamak Plasma [PDF]

, 1992
A one-dimensional tokamak transport code (TASK/TR) has been developed to analyze the evolution of a burning plasma accompanied with fusion reaction. This code deals with the electrons, deuterons, tritons, thermalized α particles, fast α particles and ...
Kasai, Takashi, Furutani, Yoichiro, Fukuyama, Atsushi   +2 more
core   +1 more source

Implementation and verification of a conservative, multi‐species, gyro‐averaged, full‐f, Lenard‐Bernstein/Dougherty collision operator in the gyrokinetic code GENE‐X

Contributions to Plasma Physics, Volume 62, Issue 5-6, June‐July 2022., 2022
Abstract Gyrokinetic simulations are among the main tools to predict turbulent transport in the core of fusion devices. Unlike the core, the plasma edge and scrape‐off layer are characterized by lower temperature and higher collisionality. To allow for realistic gyrokinetic modelling of edge and scrape‐off layer turbulence, it is crucial to include ...
Philipp Ulbl, Dominik Michels, Frank Jenko   +2 more
wiley   +1 more source

Sensitivity of Microwave Interferometer in the Limiter Shadow to filaments in ASDEX upgrade

Contributions to Plasma Physics, Volume 62, Issue 5-6, June‐July 2022., 2022
Abstract Microwave Interferometer in the Limiter Shadow (MILS) is a new diagnostic, installed on ASDEX Upgrade for electron density measurements in the far Scrape‐Off Layer (SOL). At the chosen frequency of 47 GHz, the region of measurements varies within several centimetres before and after the limiter, depending on the density.
Mariia Usoltceva, Stéphane Heuraux, Ildar Khabibullin, Helmut Faugel, Helmut Fünfgelder, Volodymyr Bobkov, ASDEX Upgrade Team   +6 more
wiley   +1 more source

A RL-based Vertical Stabilization System for the EAST tokamak

2022 American Control Conference (ACC), 2022
The Vertical Stabilization (VS) is one of the most challenging control problems in tokamak fusion reactors. Existing solutions are usually tailored for the specific device. In this work, a model-free agent trained with the Q-learning algorithm is proposed as a possible alternative solution to the VS problem.
De Tommasi, G., Dubbioso, S., Huang, Y., Luo, Z. P., Mele, A., Xiao, B. J.   +5 more
openaire   +3 more sources

Simulation of EAST quasi-snowflake discharge by tokamak simulation code

, 2015
Both theory and experiment have proved Snowflake configuration could reduce the heat loads on divertor plate. Due to limitation of PF coils, EAST could only operate with quasi-snowflake (QSF). In 2014 EAST campaign, QSF has been achieved by RZIp control.
Pironti, A., Calabrò, G., AMBROSINO, ROBERTO, Liu, L., Xiao, B. J., Crisanti, F., Xing, Z., Albanese, R., Ambrosino, R., Luo, Z. P., Yuan, Q. P., Guo, Y   +11 more
core   +2 more sources

Py-EFIT: A new Python package for plasma equilibrium reconstruction on EAST tokamak

, 2022
Plasma equilibrium is the basis for various tokamak research topics, such as plasma performance evaluation, plasma control, and physical analysis of instability, etc. In this study, we have developed a Python-based toolkit with a graphical user interface
Ballantyne, J (via Mendeley Data), Ballantyne, John   +1 more
core   +1 more source

Lithium splashing from flowing liquid lithium limiter and its effect on high confinement plasma performance in EAST tokamak

Nuclear Materials and Energy, 2020
To study the potential applications of liquid lithium (Li) as plasma facing material, the third generation of flowing liquid Li (FLiLi) limiter has been designed and successfully tested in EAST tokamak H-mode discharges in the 2018 run campaign.
Z.L. Tang, G.Z. Zuo, C.L. Li, R. Maingi, X.C. Meng, W. Xu, Z. Sun, Y.Z. Qian, M. Huang, D.H. Zhang, D. Andruczyk, K. Tritz, X.L. Yuan, X.B. Zhang, J.S. Hu   +14 more
doaj   +1 more source

A machine-learning-based tool for last closed-flux surface reconstruction on tokamaks

Nuclear Fusion, 2023
Tokamaks allow to confine fusion plasma with magnetic fields. The prediction/reconstruction of the last closed-flux surface (LCFS) is one of the primary challenges in the control of the magnetic configuration.
Chenguang Wan, Zhi Yu, Alessandro Pau, Olivier Sauter, Xiaojuan Liu, Qiping Yuan, Jiangang Li   +6 more
doaj   +1 more source

Modelling for JET Vertical Stabilization System [PDF]

, 2010
Nuclear fusion is, in a sense, the opposite of nuclear fission. Fission, which is a mature technology, produces energy through the splitting of heavy atoms like uranium in controlled chain reactions.
Bellizio, Teresa
core   +1 more source