Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Pavlos Xanthopoulos"'
Autor:
Alan G. Goodman, Pavlos Xanthopoulos, Gabriel G. Plunk, Håkan Smith, Carolin Nührenberg, Craig D. Beidler, Sophia A. Henneberg, Gareth Roberg-Clark, Michael Drevlak, Per Helander
Publikováno v:
PRX Energy, Vol 3, Iss 2, p 023010 (2024)
The stellarator is a type of fusion energy device that—if properly designed—could provide clean, safe, and abundant energy to the grid. To generate this energy, a stellarator must keep a hot mixture of charged particles (known as a plasma) suffic
Externí odkaz:
https://doaj.org/article/f829a28106894ba783f5080dfff6630f
Publikováno v:
Abstract and Applied Analysis, Vol 2003, Iss 9, Pp 521-538 (2003)
We consider a nonlinear parabolic equation involving nonmonotone diffusion. Existence and uniqueness of solutions are obtained, employing methods for semibounded evolution equations. Also shown is the existence of a global attractor for the correspon
Externí odkaz:
https://doaj.org/article/b89e2bc55958487c95efe3aa95497bad
Autor:
Alexey Mishchenko, Matthias Borchardt, Roman Hatzky, Ralf Kleiber, Axel Könies, Carolin Nührenberg, Pavlos Xanthopoulos, Gareth Roberg-Clark, Gabriel G. Plunk
Publikováno v:
Journal of Plasma Physics
Global electromagnetic turbulence is simulated in stellarator geometry using the gyrokinetic particle-in-cell code EUTERPE. The evolution of the turbulent electromagnetic field and the plasma profiles is considered at different values of the plasma b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::173071b22e4dd326b89f33597ba24495
https://hdl.handle.net/21.11116/0000-000D-3A21-D21.11116/0000-000D-3A23-B
https://hdl.handle.net/21.11116/0000-000D-3A21-D21.11116/0000-000D-3A23-B
Publikováno v:
Journal of Plasma Physics
We examine the turbulence driven by the ion and electron temperature gradients in selected magnetic configurations of the Wendelstein 7-X (W7-X) stellarator. The inherent flexibility in the configuration space of W7-X enables us to find candidate con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39197b2eb8974d5c57533068ebeab31a
https://doi.org/10.1017/s0022377822000757
https://doi.org/10.1017/s0022377822000757
Publikováno v:
Journal of Plasma Physics
A first-principles method to calculate the critical temperature gradient for the onset of the ion-temperature-gradient mode (ITG) in linear gyrokinetics is presented. We find that conventional notions of the connection length previously invoked in to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a54c7a255d5936fa89adbbb3b69efd8
https://doi.org/10.1017/s0022377821000507
https://doi.org/10.1017/s0022377821000507
Autor:
Tobias Görler, Alexey Mishchenko, D. Kennedy, Per Helander, A. Banon Navarro, Pavlos Xanthopoulos
Publikováno v:
Journal of Plasma Physics
Linear gyrokinetic simulations of magnetically confined electron–positron plasmas are performed for the first time in the geometry and parameter regimes likely to be relevant for upcoming laboratory experiments. In such plasmas, the density will be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec1db763cb86afae1f835e31eefa2553
https://doi.org/10.1017/s0022377820000276
https://doi.org/10.1017/s0022377820000276
Autor:
A. von Stechow, Olaf Grulke, Per Helander, Pavlos Xanthopoulos, Felix Wilms, Yuriy Turkin, J. A. Alcuson, Gabriel G. Plunk
Publikováno v:
Plasma Physics and Controlled Fusion
Alcusón, J A, Xanthopoulos, P, Plunk, G G, Helander, P, Wilms, F, Turkin, Y, Stechow, A V & Grulke, O 2020, ' Suppression of electrostatic micro-instabilities in maximum-J stellarators : Paper ', Plasma Physics and Controlled Fusion, vol. 62, no. 3, 035005 . https://doi.org/10.1088/1361-6587/ab630e
Alcusón, J A, Xanthopoulos, P, Plunk, G G, Helander, P, Wilms, F, Turkin, Y, Stechow, A V & Grulke, O 2020, ' Suppression of electrostatic micro-instabilities in maximum-J stellarators : Paper ', Plasma Physics and Controlled Fusion, vol. 62, no. 3, 035005 . https://doi.org/10.1088/1361-6587/ab630e
We demonstrate favorable stability properties of maximum-J stellarators, exemplified by the Wendelstein 7-X (W7-X) device, in scenarios with low plasma beta. A large number of electrostatic linear gyrokinetic simulations are conducted to scan the rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a9eb713c8ca201c762088c8731bad16
https://hdl.handle.net/21.11116/0000-0005-8A38-121.11116/0000-0005-8A3A-F
https://hdl.handle.net/21.11116/0000-0005-8A38-121.11116/0000-0005-8A3A-F
Autor:
B. J. Faber, Chris Hegna, H. Mynick, I. J. McKinney, Pavlos Xanthopoulos, M. J. Pueschel, Joseph Talmadge, David G. Anderson
Publikováno v:
Journal of Plasma Physics
Ion-temperature-gradient-driven (ITG) turbulence is compared for two quasi-symmetric (QS) stellarator configurations to determine the relationship between linear growth rates and nonlinear heat fluxes. We focus on the quasi-helically symmetric (QHS)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69a34634a94de161525188491f0d1bf2
https://hdl.handle.net/21.11116/0000-0005-44C3-221.11116/0000-0005-C54B-921.11116/0000-0005-4E44-8
https://hdl.handle.net/21.11116/0000-0005-44C3-221.11116/0000-0005-C54B-921.11116/0000-0005-4E44-8
Publikováno v:
Physics of Plasmas
The large flexibility of the proposed QUASAR facility [Gates et al., Nucl. Fusion 57, 126064 (2017)] is leveraged in order to explore the effect of magnetic shear on adiabatic Ion Temperature Gradient (ITG) turbulence. The QUASAR facility is a reimag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38c3bbed41b36d49278ad340c094230d
https://hdl.handle.net/21.11116/0000-0004-B777-821.11116/0000-0003-2AB8-F21.11116/0000-0003-2ABA-D
https://hdl.handle.net/21.11116/0000-0004-B777-821.11116/0000-0003-2AB8-F21.11116/0000-0003-2ABA-D
Autor:
Gabriele Merlo, A. Di Siena, A. von Stechow, F. Wilms, Pavlos Xanthopoulos, Gabriel G. Plunk, Frank Jenko, A. Banon Navarro, Florian Hindenlang, Maurice Maurer
Publikováno v:
Plasma Physics and Controlled Fusion
We study the effect of turbulent transport in different magnetic configurations of the Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the global gyrokinetic code GENE-3D, modeling the behavior of Ion Temper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0997827aee520e1ba6e28e83fb9ce8ed
https://doi.org/10.1088/1361-6587/aba858
https://doi.org/10.1088/1361-6587/aba858