Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Gregory W. Hammett"'
The Dougherty model Fokker–Planck operator is extended to describe nonlinear full- $f$ ( f is the distribution function) collisions between multiple species in plasmas. Simple relations for cross-species primitive moments are developed which obey c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee5c3cc0b126d706fa240e849c3a8271
http://arxiv.org/abs/2109.10381
http://arxiv.org/abs/2109.10381
Autor:
Walter Guttenfelder, D J Battaglia, Elena Belova, Nicola Bertelli, Mark D Boyer, Choong Seock Chang, Ahmed Diallo, Vinicius N Duarte, Fatima Ebrahimi, Eric Emdee, N Ferraro, Eric Fredrickson, Nikolai N Gorelenkov, William W Heidbrink, Zeki Ilhan, Stanley M Kaye, Eun-Hwa Kim, Andreas Kleiner, Florian M. Laggner, Mate Lampert, Jeff Lestz, Chang Liu, Deyong Liu, Tom Looby, Noah Mandell, Rajesh Maingi, James R Myra, Stefano Munaretto, Mario Podesta, Tariq Rafiq, Roger Raman, Matthew Reinke, Yang Ren, Juan Ruiz Ruiz, Filippo Scotti, Syun'ichi Shiraiwa, Vlad Soukhanovskii, Patrick Vail, Zhirui Wang, Will P Wehner, Anne E White, Roscoe B White, Benjamin J Q Woods, James Yang, Stewart Zweben, Santanu Banerjee, Robert Barchfeld, Ronald E Bell, John Berkery, Amitawa Bhattacharjee, Andreas Bierwage, Gustavo Paganini Canal, Xiang Chen, Cesar Fernando Clauser, Neal A Crocker, C W Domier, Todd E Evans, Manaure Francisquez, Kaifu Gan, Stefan P Gerhardt, Robert James Goldston, Travis K Gray, Ammar Hakim, Gregory W Hammett, Stephen C Jardin, Robert Kaita, Bruce E Koel, Egemen Kolemen, Seung-Hoe Ku, Shigeyuki Kubota, Benoit P LeBlanc, Fred Levinton, Jeremy D Lore, Neville C Luhmann, R. Lunsford, Ricardo Maqueda, Jonathan E Menard, Jacob H Nichols, Masayuki Ono, Jong-Kyu Park, Francesca M Poli, Terry L Rhodes, Juan Riquezes, Dave A Russell, Steve A Sabbagh, Eugenio Schuster, David Smith, Daren P Stotler, Brentley Stratton, Kevin Tritz, Weixing Wang, Brian D Wirth
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The mission of the low aspect ratio spherical tokamak NSTX-U is to advance the physics basis and technical solutions required for optimizing the configuration of next-step steady-state tokamak fusion devices. NSTX-U will ultimately operate at up to 2
Publikováno v:
Journal of Plasma Physics. 86
We present a novel discontinuous Galerkin algorithm for the solution of a class of Fokker–Planck collision operators. These operators arise in many fields of physics, and our particular application is for kinetic plasma simulations. In particular,
Autor:
Timothy Stoltzfus-Dueck, Kenneth W Gentle, E.L. Shi, Gregory W. Hammett, Tess Bernard, Ammar Hakim
Previous limiter-biasing experiments on the Texas Helimak, a simple magnetized torus, have been inconclusive on the effect of flow shear on turbulence levels. To investigate this, the first gyrokinetic simulations of limiter biasing in the Helimak us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74899f3fa96c30ec56f8ed7899ea078f
We present an energy-conserving discontinuous Galerkin scheme for the full-$f$ electromagnetic gyrokinetic system in the long-wavelength limit. We use the symplectic formulation and solve directly for $\partial A_\parallel/\partial t$, the inductive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a5c8a25a6b3ead3766e3503f9bbdb31
http://arxiv.org/abs/1908.05653
http://arxiv.org/abs/1908.05653
Publikováno v:
Nuclear Fusion. 60:096021
A conservative discontinuous Galerkin scheme for a nonlinear Dougherty collision operator in full-f long-wavelength gyrokinetics is presented. Analytically this model operator has the advective-diffusive form of Fokker-Planck operators, it has a non-
Publikováno v:
Physics of Plasmas. 27:082301
Two-fluid Braginskii codes have simulated open-field line turbulence for over a decade, and only recently has it become possible to study these systems with continuum gyrokinetic codes. This work presents a first-of-its-kind comparison between fluid
Publikováno v:
Physics of Plasmas. 27:042304
We present algorithms and results from Gkeyll, a full-f continuum, electromagnetic gyrokinetic code, designed to study turbulence in the edge region of fusion devices. The edge is computationally very challenging, requiring robust algorithms that can
Publikováno v:
Journal of Plasma Physics. 83
3D2V continuum gyrokinetic simulations of electrostatic plasma turbulence in a straight, open-field-line geometry have been performed using the full-$f$ discontinuous-Galerkin code Gkeyll. These simulations include the basic elements of a fusion-devi