Zobrazeno 1 - 10
of 391
pro vyhledávání: '"Choong Seock Chang"'
Autor:
Egemen Kolemen, David Humphreys, Eric C. Cyr, Earl Lawrence, Robert Granetz, Abani Patra, D.P. Schissel, J. Hittinger, M. D. Boyer, Choong-Seock Chang, Valerio Pascucci, Ana Kupresanin, John Canik
Publikováno v:
Journal of Fusion Energy. 39:123-155
Machine learning and artificial intelligence (ML/AI) methods have been used successfully in recent years to solve problems in many areas, including image recognition, unsupervised and supervised classification, game-playing, system identification and
Publikováno v:
IEEE Transactions on Plasma Science. :1-4
The raw data generated by simulation codes on supercomputers can be so large that it requires data reduction methods to allow scientists to understand it. Physics-based reductions are often used, for example, taking moments of particle distribution f
Publikováno v:
Journal of Plasma Physics. 87
We present a geometric particle-in-cell (PIC) algorithm on unstructured meshes for studying electrostatic perturbations with frequency lower than electron gyrofrequency in magnetized plasmas. In this method, ions are treated as fully kinetic particle
Autor:
Choong-Seock Chang, Randy Michael Churchill, D.P. Stotler, Seung-Hoe Ku, Stewart Zweben, J.L. Terry
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss, Pp 113-119 (2019)
A synthetic gas puff imaging (GPI) diagnostic is applied to a gyrokinetic turbulence simulation of Alcator C-Mod with the objective of assessing the impact of turbulent plasma fluctuations on the GPI neutral density field. We find that these effects
Autor:
Alexander Lukin, Stefan Matejcik, Lee Packer, Soare Sorin, Francesco Romanelli, Bohdan Bieg, Vladislav Plyusnin, José Vicente, Alberto Loarte, Axel Jardin, Rajnikant Makwana, CHIARA MARCHETTO, William Tang, Choong-Seock Chang, Manuel Garcia-munoz, Mark Gilbert
Publikováno v:
Fusion Engineering and Design
Accurate measurement of the nuclear environment within a test tritium breeding-blanket module of a fusion reactor is crucial to determine tritium production rates which are relevant to self-suffici ...
Autor:
Marco Andres Miller, Alp Dener, Robert Hager, Todd Munson, Choong-Seock Chang, Randy Michael Churchill
Publikováno v:
Journal of Plasma Physics. 87
An encoder–decoder neural network has been used to examine the possibility for acceleration of a partial integro-differential equation, the Fokker–Planck–Landau collision operator. This is part of the governing equation in the massively paralle
The global total-$f$ gyrokinetic particle-in-cell code XGC, used to study transport in magnetic fusion plasmas, implements a continuum grid to perform the dissipative operations, such as plasma collisions. To transfer the distribution function betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56578a709952124db7955fd58316698c
http://arxiv.org/abs/2012.11764
http://arxiv.org/abs/2012.11764
Autor:
Choong-Seock Chang, Randy Michael Churchill, J. W. Hughes, F. Köchl, R.A. Pitts, Seung-Hoe Ku, Robert Hager, A. Loarte, V. Parail
Understanding and predicting divertor heat-load width ${\lambda}_q$ is a critically important problem for an easier and more robust operation of ITER with high fusion gain. Previous predictive simulation data for ${\lambda}_q$ using the extreme-scale
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9fdc42b8581f1545d00a76d81fd9fce
http://arxiv.org/abs/2012.10750
http://arxiv.org/abs/2012.10750
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
Autor:
Frank Jenko, Gabriele Merlo, Scott Klasky, Haotian Chen, Amitava Bhattacharjee, Junyi Cheng, Sarat Sreepathi, Stephane Ethier, Seung-Hoe Ku, Robert Hager, Choong-Seock Chang, E. Suchyta, Yang Chen, Scott Parker, Eduardo D'Azevedo, Julien Dominski
Publikováno v:
Physics of Plasmas
Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transfer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bc115802cf2f3d2336adcab13162dce
https://hdl.handle.net/21.11116/0000-0007-CC56-321.11116/0000-0007-CC58-1
https://hdl.handle.net/21.11116/0000-0007-CC56-321.11116/0000-0007-CC58-1