Results 61 to 70 of about 452,681 (253)

The in-vessel components of the experiment WENDELSTEIN 7-X [PDF]

Fusion Engineering and Design, 2009
Abstract The in-vessel components of the WENDELSTEIN 7-X stellarator consist of the divertor components and the wall protection with its internal cooling supply. The main components of the open divertor are the vertical and horizontal target plates which form the pumping gap, the cryo-vacuum pumps and the control coils.
Stadler, R., Vorköper, A., Boscary, J., Cardella, A., Hurd, F., Li, C., Mendelevitch, B., Peacock, A., Pirsch, H.   +8 more
openaire   +3 more sources

An experimental characterization of core turbulence regimes in Wendelstein 7-X [PDF]

Nuclear Fusion, 2021
First results from the optimized helias Wendelstein 7-X stellarator (W7-X) have shown that core transport is no longer mostly neoclassical, as is the case in previous kinds of stellarators.
D. Carralero, T. Estrada, E. Maragkoudakis, T. Windisch, J. Alonso, M. Beurskens, S. Bozhenkov, I. Calvo, H. Damm, O. Ford, G. Fuchert, J. M. García-Regaña, N. Pablant, E. Sánchez, E. Pasch, J. Velasco, the Wendelstein 7-X team   +16 more
semanticscholar   +1 more source

Identification of important error fields in stellarators using Hessian matrix method [PDF]

, 2019
Error fields are predominantly attributed to inevitable coil imperfections. Controlling error fields during coil fabrication and assembly is crucial for stellarators.
127313, 127839, 127898, 127899, 66532, 66536, 66893, GATES, David A., HUDSON, Stuart R., LIU, Haifeng, OKAMURA, Shoichi, SHIMIZU, Akihiro, XU, Yuhong, ZHU, Caoxiang   +13 more
core   +3 more sources

Diagnostic setup for the divertor manipulator at wendelstein 7-X

Nuclear Materials and Energy, 2019
The investigation of plasma wall interactions in terms of erosion processes, fuel retention and new plasma facing components exhibits a scientific gap as discharges in tokamaks and stellarators last only seconds up to a minute.
M. Hubeny, D. Höschen, M. Rack, O. Neubauer, S. Bozhenkov, G. Czymek, B. Unterberg, R. König, D. Hathiramani, S. Brezinsek, Ch. Linsmeier   +10 more
doaj   +1 more source

Suppression of anomalous impurity transport in NBI-heated W7-X plasmas

Nuclear Fusion, 2023
Radial impurity density profiles in two Wendelstein 7-X (W7-X) experiments heated by neutral beam injection (NBI) are analyzed with respect to their impurity transport properties.
T. Romba, F. Reimold, R.J.E. Jaspers, O.P. Ford, L. Vanó, T. Klinger, the W7-X Team   +6 more
doaj   +1 more source

Preparation of the Wendelstein 7-X commissioning [PDF]

2013 IEEE 25th Symposium on Fusion Engineering (SOFE), 2013
Assembly of the superconducting stellarator Wendelstein 7-X is well advanced, and commissioning of the device is being prepared. A first draft of the commissioning tasks has been developed and will be discussed in this paper.
Bosch, H., Brakel, R., Gasparotto, M., Hartmann, D., Herrmann, R., Naujoks, D.   +5 more
openaire   +2 more sources

Characterization of injection and confinement improvement through impurity induced profile modifications on the Wendelstein 7-X stellarator

Physics of Plasmas, 2021
Pulsed injections of boron carbide granules into Wendelstein 7-X stellarator (W7-X) plasmas transiently increase the plasma stored energy and core ion temperatures above the reference W7-X experimental programs by up to 30%.
R. Lunsford, C. Killer, A. Nagy, D. Gates, T. Klinger, A. Dinklage, G. Satheeswaran, G. Kocsis, S. Lazerson, F. Nespoli, N. Pablant, A. von Stechow, A. Alonso, T. Andreeva, M. Beurskens, C. Biedermann, S. Brezinsek, K. Brunner, B. Buttenschön, D. Carralero, G. Cseh, P. Drewelow, F. Effenberg, T. Estrada, O. Ford, O. Grulke, U. Hergenhahn, U. Höfel, J. Knauer, M. Krause, M. Krychowiak, S. Kwak, A. Langenberg, U. Neuner, D. Nicolai, A. Pavone, A. Puig Sitjes, K. Rahbarnia, J. Schilling, J. Svensson, T. Szepesi, H. Thomsen, T. Wauters, T. Windisch, V. Winters, D. Zhang, L. Zsuga   +46 more
semanticscholar   +1 more source

Simulation System for the Wendelstein 7-X Safety Control System

, 2018
The Wendelstein 7-X (W7-X) Safety Instrumented System (SIS) ensures personal safety and investment protection. The development and implementation of the SIS are based on the international safety standard for the process industry sector, IEC 61511.
Herbst, U., Naujoks, D., Pingel, S., Schacht, J., Team, the W7-X, Woelk, A.   +5 more
core   +1 more source

Excitation of Alfvénic Modes via Electromagnetic Turbulence in Wendelstein 7-X.

Physical Review Letters
In this Letter, we demonstrate by comparison of computer simulations and experimental results that excitation of turbulence-driven electromagnetic secondary instabilities can serve as a paradigm to explain the observed activity of otherwise stable modes ...
J. Riemann, S. V. Mendes, K. Rahbarnia, R. Kleiber, C. Slaby, A. Koenies, M. Borchardt, A. Mishchenko, H. Thomsen, C. Büschel, A. von Stechow, the Wendelstein 7-X team, J. Bähner, S. K. Hansen, E. Edlund   +14 more
semanticscholar   +1 more source

Bolometer tomography on Wendelstein 7-X for study of radiation asymmetry

Nuclear Fusion, 2021
The algorithm for bolometer tomography at Wendelstein 7-X (W7-X) has been recently improved using a novel regularization functional, based on relative gradient smoothing of the sought radiation profile.
D. Zhang, R. Burhenn, C. Beidler, Y. Feng, H. Thomsen, C. Brandt, S. Buller, F. Reimold, P. Hacker, R. Laube, J. Geiger, J. Regaña, H. M. Smith, R. König, L. Giannone, F. Penzel, T. Klinger, J. Baldzuhn, S. Bozhenkov, T. Bräuer, J. Brunner, B. Buttenschön, H. Damm, M. Endler, F. Effenberg, G. Fuchert, Y. Gao, M. Jakubowski, J. Knauer, T. Kremeyer, M. Krychowiak, S. Kwak, H. Laqua, A. Langenberg, M. Otte, N. Pablant, E. Pasch, K. Rahbarnia, A. Pavone, L. Rudischhauser, J. Svensson, C. Killer, T. Windisch, the W7-X team   +43 more
semanticscholar   +1 more source