Results 11 to 20 of about 18,093 (183)

Overview of the JET results in support to ITER [PDF]

, 2017
The 2014–2016 JET results are reviewed in the light of their significance for optimising the ITER research plan for the active and non-active operation. More than 60 h of plasma operation with ITER first wall materials successfully took place since its
Abduallev, S., Abhangi, M., Abreu, P., Afzal, M., Galdón-Quiroga, J., García Muñoz, Manuel, Litaudon, X., Viezzer, Eleonora   +7 more
core   +1 more source

Tungsten impurity transport experiments in Alcator C-Mod to address high priority research and development for ITERa) [PDF]

Physics of Plasmas, 2015
Experiments in Alcator C-Mod tokamak plasmas in the Enhanced D-alpha H-mode regime with ITER-like mid-radius plasma density peaking and Ion Cyclotron Resonant heating, in which tungsten is introduced by the laser blow-off technique, have demonstrated that accumulation of tungsten in the central region of the plasma does not take place in these ...
Loarte, A., Reinke, M. L., Polevoi, A. R., Hosokawa, M., Köchl, F., Pütterich, T., Dux, R., Zhogolev, V. E., Chilenski, Mark Alan, Howard, Nathaniel Thomas, Hubbard, Amanda E, Hughes Jr, Jerry, Walk Jr, John R, Rice, John E.   +13 more
openaire   +3 more sources

3D simulations of gas puff effects on edge plasma and ICRF coupling in JET [PDF]

, 2017
Recent JET (ITER-Like Wall) experiments have shown that the fueling gas puffed from different locations of the vessel can result in different scrape-off layer (SOL) density profiles and therefore different radio frequency (RF) coupling.
Bilato, R., Bobkov, V., Coster, D., Feng, Y., Goniche, M., Guillemaut, C., Harting, D., Jacquet, P., Jet Contributors, The, Lerche, E., Lunt, T., Noterdaeme, J.-M., Szepesi, G., van Eester, D., Zhang, Wei   +14 more
core   +4 more sources

Global modelling of tungsten impurity transport based on the drift-kinetic equation

Nuclear Fusion, 2019
A global kinetic simulation model of collisional impurity transport is developed for evaluating the radial particle flux of tungsten impurity in the edge region of a tokamak plasma. Here, the plasma including the impurity and the background ion is presupposed to be quasi-steady.
Ryutaro Kanno, Gakushi Kawamura, Masanori Nunami, Yuki Homma, Akiyoshi Hatayama, Kazuo Hoshino   +5 more
openaire   +1 more source

The effect of metastable atomic levels in neutral tungsten for erosion and impurity transport applications

Plasma Physics and Controlled Fusion, 2020
Abstract Long-lived metastable states in neutral tungsten are shown to potentially impact measurements of tungsten erosion from plasma facing components. Time-dependent collisional radiative modeling of neutral tungsten is used to analyze the role of these states in tungsten emission and ionization.
C A Johnson, S D Loch, D A Ennis
openaire   +2 more sources

Experimental conditions to suppress edge localised modes by magnetic perturbations in the ASDEX Upgrade tokamak

, 2018
Access conditions for full suppression of Edge Localised Modes (ELMs) by Magnetic Perturbations (MP) in low density high confinement mode (H-mode) plasmas are studied in the ASDEX Upgrade tokamak.
Bobkov, V., Cavedon, M., Dunne, M., Kirk, A., McDermott, R. M., Meyer, H., Nazikian, R., Paz-Soldan, C., Ryan, D. A., Suttrop, W., Viezzer, E., Willensdorfer, M.   +11 more
core   +1 more source

Charge dependence of neoclassical and turbulent transport of light impurities on MAST [PDF]

, 2015
Carbon and nitrogen impurity transport coefficients are determined from gas puff experiments carried out during repeat L-mode discharges on the Mega-Amp Spherical Tokamak (MAST) and compared against a previous analysis of helium impurity transport on ...
Casson, F. J., Dickinson, D., Garzotti, L., Henderson, S. S., O'Mullane, M., Patel, A., Roach, C. M., Summers, H. P., Tanabe, H., team, the MAST, Valovic, M.   +10 more
core   +2 more sources

A Tunable Two-impurity Kondo system in an atomic point contact [PDF]

, 2011
Two magnetic atoms, one attached to the tip of a Scanning Tunneling Microscope (STM) and one adsorbed on a metal surface, each constituting a Kondo system, have been proposed as one of the simplest conceivable systems potentially exhibiting quantum ...
A Georges, A Yazdani, AC Hewson, AJ Heinrich, BA Jones, BA Jones, BA Jones, BA Jones, BC Stipe, C Jayaprakash, D Jacob, D van der Marel, DM Eigler, E Sela, G Zaránd, H Jeong, J Malecki, JA Gupta, Jakob Bork, Johann Kroha, K Tao, KG Wilson, KG Wilson, Klaus Kern, L De Leo, L Limot, L Vitali, Lars Diekhöner, László Borda, M Klein, M Plihal, N Néel, N Néel, ND Mathur, NJ Craig, P Lucignano, P Simon, P Wahl, Pascal Simon, Peter Wahl, R Bulla, R Bulla, R López, S Sachdev, SA Grigera, v Löhneysen, V Madhavan, V Madhavan, W Chen, Yong-hui Zhang   +49 more
core   +2 more sources

Design of EAST lower divertor by considering target erosion and tungsten ion transport during the external impurity seeding

Nuclear Fusion, 2021
Abstract To demonstrate the performance of tungsten (W) as the divertor target material and to solve the power handling problem during high power long-pulse discharge, the upgrade of EAST lower divertor is planned. In this work, the physical design of the W divertor is presented by using 2D edge plasma code SOLPS and Monte Carlo impurity
Chaofeng Sang, Qingrui Zhou, Guosheng Xu, Liang Wang, Yilin Wang, Xuele Zhao, Chen Zhang, Rui Ding, Guozhang Jia, Damao Yao, Xiaoju Liu, Hang Si, Dezhen Wang, null the EAST Team   +13 more
openaire   +1 more source

EUV spectra of highly-charged ions W$^{54+}$-W$^{63+}$ relevant to ITER diagnostics

, 2008
We report the first measurements and detailed analysis of extreme ultraviolet (EUV) spectra (4 nm to 20 nm) of highly-charged tungsten ions W$^{54+}$ to W$^{63+}$ obtained with an electron beam ion trap (EBIT).
, Ali M A, Cowan R D, Donné A J H, Feldman U, G E Holland, Gillaspy J D, I N Draganic, J D Gillaspy, J M Pomeroy, J N Tan, J Reader, Kalagin I V, Liu Y F, Penetrante B M, Ralchenko Yu, Ralchenko Yu, Ralchenko Yu Jou F-C Kelleher D E Kramida A E Musgrove A Reader J Wiese W L Olsen K, Traebert E, U Feldman, Yu Ralchenko   +20 more
core   +1 more source