Results 111 to 120 of about 452,681 (253)

Wendelstein 7-X on the path to long-pulse high-performance operation

, 2021
The Wendelstein 7-X project is aimed at demonstrating that an optimised stellarator is an attractive candidate for a fusion reactor. This requires the achievement of a number of technical and physics goals.
M. Endler, J. Baldzuhn, C. Beidler, H. Bosch, S. Bozhenkov, B. Buttenschön, A. Dinklage, J. Fellinger, Y. Feng, G. Fuchert, Yu Gao, J. Geiger, O. Grulke, D. Hartmann, M. Jakubowski, R. König, H. Laqua, S. Lazerson, P. McNeely, D. Naujoks, U. Neuner, M. Otte, E. Pasch, T. Pedersen, V. Perseo, A. Sitjes, K. Rahbarnia, N. Rust, O. Schmitz, A. Spring, T. Stange, A. Stechow, Y. Turkin, E. Wang, R. Wolf   +34 more
semanticscholar   +1 more source

Concurrent operation of 10 gyrotrons at W7-X experience and improvement opportunities

EPJ Web of Conferences, 2018
At the stellarator Wendelstein 7-X (W7-X) Electron Cyclotron Resonance Heating (ECRH) is the main heating system for steady-state operation and was the only available heating system during the operation phase OP1.2a in 2017.
Braune H., Brunner K.J., Laqua H.P., Marsen S., Moseev D., Noke F., Purps F., Schneider N., Schulz T., Stange T., Uhren P., Wilde F.   +11 more
doaj   +1 more source

Dwarf novae in the Hamburg quasar survey : rarer than expected [PDF]

, 2006
Aims. We report the discovery of five new dwarf novae that were spectroscopically identified in the Hamburg Quasar Survey (HQS),and discuss the properties of the sample of new dwarf novae from the HQS. Methods.
A. Aungwerojwit, A. Staude, Abbott, Andronov, Araujo-Betancor, Araujo-Betancor, Aungwerojwit, B. T. Gänsicke, Barker, Bergeron, Berriman, Bertin, Beuermann, Billington, Cannizzo, D. Engels, D. Mislis, D. Nogami, de Kool, E. T. Harlaftis, Fiedler, Gilliland, Gänsicke, Gänsicke, Gänsicke, Gänsicke, Gänsicke, H.-J. Hagen, Hagen, Hamilton, Hessman, Hessman, Horne, Howell, Howell, Jiang, Kato, Kato, King, King, Knigge, Kolb, Kolb, M. A. P. Torres, Martin, Mennickent, Monet, Nogami, O. Baernbantner, Osaki, P. Rodríguez-Gil, P. Schmeer, Paczynski, Patterson, Patterson, Patterson, Patterson, Patterson, Patterson, Patterson, Politano, R. E. Fried, R. Schwarz, Rappaport, Reimers, Renvoizé, Ringwald, Ritter, Rodríguez-Gil, Rodríguez-Gil, Rodríguez-Gil, Rodríguez-Gil, Rogoziecki, Roth, S. Araujo-Betancor, Scargle, Schneider, Schwarz, Schwarzenberg-Czerny, Schwarzenberg-Czerny, Shafter, Shafter, Shafter, Spruit, Stauffer, Szkody, Szkody, Tappert, Thorstensen, Thorstensen, Thorstensen, Tovmassian, Townsley, van Teeseling, Voges, Wade, Wu, Zhang   +97 more
core   +2 more sources

Commissioning and first results of the 174 GHz collective Thomson scattering diagnostic at Wendelstein 7-X

Journal of Instrumentation
Collective Thomson Scattering (CTS) diagnostics measure the scattering spectrum of monochromatic incident radiation off collective fluctuations in the plasma.
D. Moseev, S. Ponomarenko, H. Laqua, T. Stange, S. Nielsen, H. Braune, G. Gantenbein, S. Illy, J. Jelonnek, W. Kasparek, A. Kuleshov, L. Krier, C. Lechte, S. Marsen, M. Nishiura, B. Plaum, R. Ragona, T. Ruess, M. Salewski, P. Stordiau, M. Thumm, R. Wolf, J. Zimmermann, the W7-X Team   +23 more
semanticscholar   +1 more source

Theoretical interpretation of W soft X-ray spectra collected by the pulse height analysis system on Wendelstein 7-X stellarator

Physics of Plasmas
In many fusion devices, such as tokamaks or stellarators like Wendelstein 7-X (W7-X), soft x-ray pulse height analysis (PHA) system diagnostics are routinely used during the experiments.
Ł. Syrocki, M. Kubkowska, S. Jabłoński, U. Neuner   +3 more
semanticscholar   +1 more source

In-vessel inspection of arc traces on the W7-X plasma facing components after the operation phase OP2.1

Nuclear Materials and Energy
Updated distribution of arc traces across the interior walls after the operation phase 2.1 of Wendelstein 7-X (W7-X) is reported. A total of 105 new arc places were found, with 95% of them located around the stainless steel panels, diagnostic ports, and ...
D. Hwangbo, C.P. Dhard, S. Kajita, D. Naujoks, Y. Gao   +4 more
doaj   +1 more source

Impact of spatially varying transport coefficients in EMC3-Eirene simulations of W7-X and assessment of drifts

Nuclear Fusion
Modelling the scrape-off layer of a stellarator is challenging due to the complex magnetic 3D geometry. The here presented study analyses simulations of the scrape-off layer (SOL) of the stellarator Wendelstein 7-X (W7-X) using spatially varying ...
David Bold, Felix Reimold, Holger Niemann, Yu Gao, Marcin Jakubowski, Carsten Killer, Victoria R. Winters, Nassim Maaziz, the W7-X Team   +8 more
doaj   +1 more source

In-vessel colorimetry of Wendelstein 7-X first wall components after OP2.1

Nuclear Materials and Energy
Colorimetry has been continuously utilized for the estimation of deposition layer distribution on the first wall panels and divertor target elements in each Operation Phases (OP) of Wendelstein 7-X (W7-X).
G. Motojima, S. Masuzaki, C.P. Dhard, D. Naujoks, Mattis Hänel, Yu Gao   +5 more
doaj   +1 more source

Publisher Correction: Demonstration of reduced neoclassical energy transport in Wendelstein 7-X. [PDF]

Nature, 2021
Beidler CD, Smith HM, Alonso A, Andreeva T, Baldzuhn J, Beurskens MNA, Borchardt M, Bozhenkov SA, Brunner KJ, Damm H, Drevlak M, Ford OP, Fuchert G, Geiger J, Helander P, Hergenhahn U, Hirsch M, Höfel U, Kazakov YO, Kleiber R, Krychowiak M, Kwak S, Langenberg A, Laqua HP, Neuner U, Pablant NA, Pasch E, Pavone A, Pedersen TS, Rahbarnia K, Schilling J, Scott ER, Stange T, Svensson J, Thomsen H, Turkin Y, Warmer F, Wolf RC, Zhang D, W7-X Team.   +39 more
europepmc   +1 more source

Core plasma fueling by fast inward particle transport after hydrogen pellet injection in Wendelstein 7-X

Nuclear Fusion
A large database of more than 1000 individual cryogenic hydrogen pellets injected into Wendelstein 7-X for plasma fueling was analyzed to improve the understanding of the three phases of the process: the ablation, deposition and transport of the pellet ...
H. Damm, J. Baldzuhn, R.C. Wolf, T.S. Petersen, J. Schilling, N. Panadero, S.A. Bozhenkov, C. Brandt, K.J. Brunner, G. Fuchert, J. Knauer, A. Langenberg, S. Kwak, N.A. Pablant, E. Pasch, H. Thomsen, the W7-X Team   +16 more
doaj   +1 more source