Results 31 to 40 of about 452,681 (253)

Ion-temperature- and density-gradient-driven instabilities and turbulence in Wendelstein 7-X close to the stability threshold [PDF]

Journal of Plasma Physics, 2023
Electrostatic gyrokinetic instabilities and turbulence in the Wendelstein 7-X stellarator are studied. Particular attention is paid to the ion-temperature-gradient (ITG) instability and its character close to marginal stability [Floquet-type turbulence ...
L. Podavini, A. Zocco, J. M. García-Regaña, M. Barnes, F. Parra, A. Mishchenko, P. Helander   +6 more
semanticscholar   +1 more source

Heterogeneous design and mechanical analysis of HELIAS 5‐B helium‐cooled pebble bed breeding blanket concept

International Journal of Energy Research, Volume 46, Issue 3, Page 2748-2770, 10 March 2022., 2022
Summary One of the most challenging objectives of the European research concerning nuclear fusion technology, promoted by the EUROfusion consortium, is to bring stellarator‐type nuclear fusion devices to maturity. To this purpose, studies on a large HELIcal‐axis advanced stellarator (HELIAS), extrapolated from Wendelstein 7‐X and based on a 5‐fold ...
Gaetano Bongiovì, Giovanni Marra, Rocco Mozzillo, Andrea Tarallo   +3 more
wiley   +1 more source

Collisionless microinstabilities in stellarators II - numerical simulations [PDF]

, 2013
Microinstabilities exhibit a rich variety of behavior in stellarators due to the many degrees of freedom in the magnetic geometry. It has recently been found that certain stellarators (quasi-isodynamic ones with maximum-$J$ geometry) are partly resilient
Helander, P., Proll, J. H. E., Xanthopoulos, P.   +2 more
core   +1 more source

Status of WENDELSTEIN 7-X construction [PDF]

Proceedings of the 19th IEEE/IPSS Symposium on Fusion Engineering. 19th SOFE (Cat. No.02CH37231), 2003
WENDELSTEIN 7-X, being under construction at the Greifswald branch of the Max-Planck-Institut fur Plasmaphysik, has the objective to prove the reactor relevance of a HELIAS type stellarator. Energy and particle confinement will be investigated in an optimised magnetic configuration and stationary operation of a reactor relevant divertor system will be ...
openaire   +6 more sources

Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X [PDF]

Nuclear Fusion, 2021
We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have ...
T. Sunn Pedersen, E. Sánchez
semanticscholar   +1 more source

How well can today's tooth‐colored dental restorative materials reproduce the autofluorescence of human teeth? – Ambition and reality!

Journal of Esthetic and Restorative Dentistry, Volume 33, Issue 5, Page 720-738, July 2021., 2021
Abstract Objectives The autofluorescence of dental hard tissues has been known for over 100 years. Thus, manufacturers add fluorophores to dental restorative materials to improve the esthetic properties of these materials. So far, there has been no study evaluating the ability of these fluorophores to reproduce the autofluorescence of dental hard ...
Christian Klein, Thomas Connert, Christiane von Ohle, Christian Meller   +3 more
wiley   +1 more source

Sphingolipid long‐chain base hydroxylation influences plant growth and callose deposition in Physcomitrium patens

New Phytologist, Volume 231, Issue 1, Page 297-314, July 2021., 2021
Summary Sphingolipids are enriched in microdomains in the plant plasma membrane (PM). Hydroxyl groups in the characteristic long‐chain base (LCB) moiety might be essential for the interaction between sphingolipids and sterols during microdomain formation.
Jasmin Gömann, Cornelia Herrfurth, Agnieszka Zienkiewicz, Till Ischebeck, Tegan M. Haslam, Ellen Hornung, Ivo Feussner   +6 more
wiley   +1 more source

Overdense plasma heating in Wendelstein 7-X(W7-X) stellarator

Results in Physics, 2017
High yield nuclear fusion operating in tokamak and stellarator need to heat plasma up to the required temperatures. As the confined plasma is overdensed, the electron cyclotron resonance heating (ECRH) is inefficient due to cut-off layer.
S. Adlparvar, S. Miraboutalebi, S.M. Sadat Kiai, L. Rajaee   +3 more
doaj   +1 more source

Corrigendum: Gas exhaust in the Wendelstein 7-X stellarator during the first divertor operation (2022 Nucl. Fusion 62 096016)

Nuclear Fusion, 2023
In the published paper titled ‘Gas exhaust in the Wendelstein 7-X stellarator during the first divertor operation’ (2022 Nucl. Fusion   https://doi.org/10.1088/1741-4326/ac7ac4 ), figure 8 was incorrect. This corrigendum provides the correct figure 8 .
U. Wenzel, G. Schlisio, P. Drewelow, M. Krychowiak, R. König, T.S. Pedersen, S. Bozhenkov, V. Haak, A.K. Kharwandikar, S. Lazerson, D. Naujoks, V. Perseo, V. Winters   +12 more
doaj   +1 more source

Ion temperature clamping in Wendelstein 7-X electron cyclotron heated plasmas

Nuclear Fusion, 2021
The neoclassical transport optimization of the Wendelstein 7-X stellarator has not resulted in the predicted high energy confinement of gas fueled electron-cyclotron-resonance-heated (ECRH) plasmas as modelled in (Turkin et al 2011 Phys.
M. Beurskens, S. Bozhenkov, O. Ford, P. Xanthopoulos, A. Zocco, Y. Turkin, A. Alonso, C. Beidler, I. Calvo, D. Carralero, T. Estrada, G. Fuchert, O. Grulke, M. Hirsch, K. Ida, M. Jakubowski, C. Killer, M. Krychowiak, S. Kwak, S. Lazerson, A. Langenberg, R. Lunsford, N. Pablant, E. Pasch, A. Pavone, F. Reimold, T. Romba, A. von Stechow, H. M. Smith, T. Windisch, M. Yoshinuma, D. Zhang, R. Wolf, the W7-X team   +33 more
semanticscholar   +1 more source