Results 71 to 80 of about 12,708 (208)

Zonal flow generation and its feedback on turbulence production in drift wave turbulence

, 2012
Plasma turbulence described by the Hasegawa-Wakatani equations has been simulated numerically for different models and values of the adiabaticity parameter C.
Bos, Wouter J. T., Nazarenko, Sergey V., Pushkarev, Andrey V.   +2 more
core   +3 more sources

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

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

An improved approach to eliminate the error induced by vibrations for laser speckle interferometry under tokamak vibrational environments

Nuclear Materials and Energy, 2020
To build an online and non-contact diagnosis system of surface morphology of Plasma-Facing Components (PFCs) in fusion devices, a measurement system based on Laser Speckle Interferometry (LSI) is in development in our laboratory.
Yuanbo Li, Xiaoqian Cui, Shuhua Li, Hongbin Ding   +3 more
doaj   +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

KTM TOKAMAK OPERATION SCENARIOS SOFTWARE INFRASTRUCTURE

Nuclear Engineering and Technology, 2014
One of the largest problems for tokamak devices such as Kazakhstan Tokamak for Material Testing (KTM) is the operation scenarios' development and execution.
V PAVLOV, K. BAYSTRUKOV, YU. GOLOBOKOV, A. OVCHINNIKOV, A. MEZENTSEV, S. MERKULOV, A. LEE, I. TAZHIBAYEVA, G. SHAPOVALOV   +8 more
doaj   +1 more source

Nonlinear growth of zonal flows by secondary instability in general magnetic geometry

, 2017
We present a theory of the nonlinear growth of zonal flows in magnetized plasma turbulence, by the mechanism of secondary instability. The theory is derived for general magnetic geometry, and is thus applicable to both tokamaks and stellarators.
Navarro, A. Bañón, Plunk, G. G.
core   +1 more source

Introducing electromagnetic effects in Soledge3X

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract In the pedestal region, electromagnetic effects affect the evolution of micro‐instabilities and plasma turbulence. The transport code Soledge3X developed by the CEA offers an efficient framework for turbulent 3D simulation on an electrostatic model with a fixed magnetic field. The physical accuracy of the model is improved with electromagnetic
Raffael Düll, Hugo Bufferand, Eric Serre, Guido Ciraolo, Virginia Quadri, Nicolas Rivals, Patrick Tamain   +6 more
wiley   +1 more source

Progress in pedestal and edge physics: Chapter 3 of the special issue: on the path to tokamak burning plasma operation

Nuclear Fusion
This paper describes the extensive progress that has been made in the understanding of tokamak pedestal physics since the 2007 publication of ‘Progress in the ITER Physics Basis’ (Ikeda 2007 Nucl. Fusion 47 E01–S500).
M.E. Fenstermacher (Chair, Pedestal and Edge Physics), L.R. Baylor, E. de la Luna, M.G. Dunne, G.T.A. Huijsmans, A. Kirk, F.M. Laggner, T.H. Osborne, C. Paz-Soldan, S. Saarelma, P.B. Snyder, E. Viezzer, M. Becoulet, K.H. Burrell, A. Cathey, X. Chen, M. Hoelzl, J.W. Hughes, R. Maingi, A.O. Nelson, H. Urano, E. Wolfrum, X.Q. Xu, A. Diallo, L. Frassinetti, S. Futatani, L. Gil, R. Groebner, T. Happel, S.H. Kim, J. King, B. Labit, P.T. Lang, Y.Q. Liu, Z.X. Liu, R. Lunsford, G.Y. Park, U. Sheikh, W. Suttrop, B. Vanovac, R.S. Wilcox, A. Wingen, T. Zhang   +42 more
doaj   +1 more source