Results 81 to 90 of about 141,584 (298)

Numerical Studies and Simulation of the Lower Hybrid Waves Current Drive by using Fokker – Planck Equation in NSST and HT-7 Tokamaks [PDF]

Journal of Sciences, Islamic Republic of Iran, 2014
Recent experiments on the spherical tokamak have discovered the conditions to create a powerful plasma and ensure easy shaping and amplification of stability, high bootstrap current and confinement energy.
A.A. Molavi Choobini
doaj  

Status of the COMPASS tokamak and characterization of the first H-mode

, 2015
This paper summarizes the status of the COMPASS tokamak, its comprehensive diagnostic equipment and plasma scenarios as a baseline for the future studies. The former COMPASS-D tokamak was in operation at UKAEA Culham, UK in 1992–2002.
R. Pánek, J. Adamek, M. Aftanas, P. Bílková, P. Bohm, F. Brochard, P. Cahyna, J. Cavalier, R. Dejarnac, M. Dimitrova, O. Grover, J. Harrison, P. Háček, J. Havlicek, A. Havránek, J. Horáček, M. Hron, M. Imrisek, F. Janky, A. Kirk, M. Komm, K. Kovářík, J. Krbec, L. Kripner, T. Markovič, K. Mitošinková, J. Mlynar, D. Naydenkova, M. Peterka, J. Seidl, J. Stöckel, E. Štefániková, M. Tomes, J. Urban, P. Vondracek, M. Varavin, J. Varju, V. Weinzettl, J. Zajac   +38 more
semanticscholar   +1 more source

X‐ray lens figure errors retrieved by deep learning from several beam intensity images

Journal of Synchrotron Radiation, Volume 31, Issue 5, Page 1001-1009, September 2024.
A neural network trained with a few thousand simulations using random errors is demonstrated to predict accurately the lens error profile that accounts for all aberrations of a compound refractive lens in a synchrotron beamline.The phase problem in the context of focusing synchrotron beams with X‐ray lenses is addressed.
Manuel Sanchez del Rio, Rafael Celestre, Juan Reyes-Herrera   +2 more
wiley   +1 more source

SPECTROSCOPIC DIAGNOSTICS OF TOKAMAKS

Le Journal de Physique Colloques, 1988
AbstractImpurities being an important concern in tokamaks, spectroscopy plays a key role in their understanding. Techniques for the evaluation of concentrations, power losses and transport properties are surveyed, and a few developments are outlined.
openaire   +3 more sources

Cross-tokamak disruption prediction based on domain adaptation

Nuclear Fusion
The high acquisition cost and the significant demand for disruptive discharges for data-driven disruption prediction models in future tokamaks pose an inherent contradiction in disruption prediction research.
Chengshuo Shen, Wei Zheng, Bihao Guo, Yonghua Ding, Dalong Chen, Xinkun Ai, Fengming Xue, Yu Zhong, Nengchao Wang, Biao Shen, Binjia Xiao, Zhongyong Chen, Yuan Pan, J-TEXT Team   +13 more
doaj   +1 more source

Advancements in Tokamak Technology for Fusion Energy: A Bibliometric and Patent Trend Analysis (2014–2024)

Energies
Tokamak technology, as the cornerstone of nuclear fusion energy, holds immense potential in achieving efficient plasma confinement and high energy densities.
Horng Jinh Chang, Shih Wei Wang
doaj   +1 more source

Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod

, 2018
In the Alcator C-Mod tokamak, relativistic runaway electron (RE) generation can occur during the flattop current phase of low density, diverted plasma discharges.
Embréus, O., Granetz, R. S., Hoppe, M., Tinguely, R. A.   +3 more
core   +1 more source

Comparison of the scrape‐off layer two‐point model for deuterium and helium plasmas in JET ITER‐like wall low‐confinement plasma conditions

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract The hydrogenic two‐point model (H‐2PM), an analytical model for the scrape‐off layer that predicts a common electron and ion temperature and density along a flux tube from a target temperature and density, is adapted to a single‐species helium (He) model, preserving the 2PM assumptions and analytical nature.
David Rees, Joona Sissonen, Mathias Groth, Vesa‐Pekka Rikala, Henri Kumpulainen, Beth Thomas, Mathias Brix, JET Contributors   +7 more
wiley   +1 more source

First SOLPS‐ITER simulations of ASDEX Upgrade partially detached H‐mode with boron impurity: The missing radiation at the outer strike‐point region

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract Partially detached H‐modes are the baseline regime for the future ITER operation. The ASDEX Upgrade partially detached H‐mode is modeled using the SOLPS‐ITER code with drifts enabled and compared with experimental data. For the first time, boron (B) impurity is simulated in the Scrape‐off layer (SOL) and divertor. A comparison between divertor
S. O. Makarov, D. P. Coster, T. Gleiter, D. Brida, M. Muraca, R. Dux, P. David, B. Kurzan, X. Bonnin, M. O'Mullane, ASDEX Upgrade Team   +10 more
wiley   +1 more source

Self‐organization of plasma edge turbulence in interaction with recycling neutrals

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract Experimental results from several tokamaks suggest a strong impact of divertor density regimes on turbulent transport in the edge plasma. Reciprocally, the change in transverse transport and SOL width affects the access to density regimes, making it a fundamental topic for heat exhaust issue. Such phenomenology is highly nonlinear and can only
V. Quadri, P. Tamain, Y. Marandet, H. Bufferand, N. Rivals, G. Ciraolo, G. Falchetto, R. Düll, H. Yang   +8 more
wiley   +1 more source