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Numerical imaging of edge plasma characteristics in the high-recycling scrape-off layer of the KSTAR tokamak

Jin-Seok Ko, Ki-Hak Im, Deok-Kyu Kim, Sang Hee Hong
2002 IEEE Transactions on Plasma Science  
The results of the simulation can be utilized to provide guidelines for future operation of the KSTAR tokamak regarding the relation between upstream plasma properties and divertor operation regimes.  ...  Index Terms-Edge plasma, high-recycling divertor operation, KSTAR tokamak, Monte Carlo neutral transport.  ...  Numerical simulations for the KSTAR tokamak with an input power of 6.5 MW and an edge density of 5.  ... 
doi:10.1109/tps.2002.1003925 fatcat:ltz6rq6c5ng73kbzxr7nypveii

Fluid-particle hybrid simulation on the transports of plasma, recycling neutrals, and carbon impurities in the Korea Superconducting Tokamak Advanced Research divertor region

Deok-Kyu Kim, Sang Hee Hong
2005 Physics of Plasmas  
zone is formed in front of the divertor by increasing plasma density and by reducing power flow into the scrape-off layer.  ...  A two-dimensional simulation modeling that has been performed in a self-consistent way for analysis on the fully coupled transports of plasma, recycling neutrals, and intrinsic carbon impurities in the  ...  are taken into account simultaneously in the scrape-off layer ͑SOL͒.  ... 
doi:10.1063/1.1914807 fatcat:cypn552g7va7na4c467yvap7ay

Fusion Research and International Collaboration in the Asian Region

Shigeru MORITA, Liqun HU, Yeong-Kook OH, Naoko ASHIKAWA, Mitsutaka ISOBE, Daiji KATO, Yasuaki KISHIMOTO, Satoshi OHDACHI, Satoru SAKAKIBARA, Yasushi TODO, Yutaka KAMADA, Daniel RAJU (+1 others)
2018 Plasma and Fusion Research  
Jiangang LI for his continuous encouragement and productive discussions in executing the A3 program.  ...  Acknowledgments International collaboration among China, Japan and Korea was supported by the JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics (NSFC: No.11261140328, NRF: No. 2012K2A2A6000443  ...  Edge impurity transport Carbon transport in the scrape-off layer (SOL) of HL-2A, where the parallel transport is dominant, is studied for different impurity source locations such as limiter, dome and divertor  ... 
doi:10.1585/pfr.13.3502046 fatcat:uvk7fq4qk5a4ngb5a7dizxbszy

Effects of a shallow SAS divertor on detachment in KSTAR

OokJoo Ra, Kyu Been Kwon, Livia Casali, Houyang Guo, Peter C. Stangeby, Min Sup Hur
2020 Nuclear Fusion  
Deuterium neutrals are concentrated along the divertor separatrix line in the shallow SAS, while deuterium density in the open divertor peaks in the far-scrape-off layer.  ...  For long pulse operation of fusion reactors, it is important to reduce sputter-erosion and power loading of the divertor target by means of plasma detachment.  ...  Usually detachment is obtained by increasing the upstream density in the scrape-off layer (SOL).  ... 
doi:10.1088/1741-4326/abc355 fatcat:gvexj4utxrdt5asrilu4nuubcy

Fast-ion redistribution and loss due to edge perturbations in the ASDEX Upgrade, DIII-D and KSTAR tokamaks

M. Garcia-Munoz, S. Äkäslompolo, O. Asunta, J. Boom, X. Chen, I.G.J. Classen, R. Dux, T.E. Evans, S. Fietz, R.K. Fisher, C. Fuchs, B. Geiger (+19 others)
2013 Nuclear Fusion  
DIII-D and KSTAR tokamaks.  ...  Measured fast-ion losses show a broad energy and pitch-angle range and are typically on banana orbits that explore the entire pedestal / Scrape-Off-Layer (SOL).  ...  However, neither standard fluid simulations based on the baseline plasma transport theory in stochastic magnetic fields [15] nor the most advanced two-fluids, kinetic nor hybrid simulations have successfully  ... 
doi:10.1088/0029-5515/53/12/123008 fatcat:4dy7vl2vavb5tn7wka2gfmzpcm

Increased fluctuation in the edge tokamak plasmas with the resonant magnetic perturbation field [article]

Minjun J. Choi
2021 arXiv   pre-print
The resonant magnetic perturbation (RMP) field has been utilized to suppress the edge localized mode (ELM) in tokamak plasmas.  ...  We analyzed the bicoherence and the rescaled Jensen-Shannon complexity of the electron temperature fluctuation measured in KSTAR experiment to identify the nonlinear coupling and the change of statistical  ...  ACKNOWLEDGMENTS The authors would like to express sincere gratitude to the KSTAR team. M.J.C. acknowledges helpful discussion with M. Cao  ... 
arXiv:2102.10733v5 fatcat:kcayhes5aff7pa44okqf7xjs2a

Atomic processes leading to asymmetric divertor detachment in KSTAR L-mode plasmas

Jae Sun Park, Mathias Groth, Richard Pitts, Jun-Gyo Bak, S.G. Thatipamula, June-Woo Juhn, Suk-Ho Hong, Wonho Choe
2018 Nuclear Fusion  
The pressure and power loss factors defined in the two-point model [1] [2] [3] [4] of the divertor scrape-off layer (SOL) and the sources contributing to the loss factors are calculated through post-processing  ...  Atomic processes leading to asymmetric divertor detachment in KSTAR L-mode plasmas. Nuclear Fusion, 58(12), [126033]. https://doi.  ...  The first author is grateful to David Moulton, who provided advice for understanding the balance routine in SOLPS-ITER to classify the power and pressure loss mechanisms.  ... 
doi:10.1088/1741-4326/aae865 fatcat:ovvdbegacrecpo6kuodrl6n62a

Summary of 21st joint EU-US transport task force workshop (Leysin, September 5–8, 2016)

P. Mantica, C. Bourdelle, Y. Camenen, R. Dejarnac, T. Evans, T. Görler, J. Hillesheim, Y. Idomura, M. Jakubowski, P. Ricci, A. White
2017 Nuclear Fusion  
The workshop was organized under 8 topics: progress towards full-F kinetic turbulence simulation; high and low Z impurity transport, control and effects on plasma confinement; 3D effects on core and edge  ...  It was agreed at the workshop to prepare a short conference report for publication in a plasma physics journal, in order to provide a useful feedback to the whole fusion community and in line with previous  ...  local host SPC, for the perfect organization of a very fruitful and interesting meeting.  ... 
doi:10.1088/1741-4326/aa753f fatcat:puf2zfwjgfd6rhm4yj6ol7vnj4

A theoretical interpretation of the main scrape-off layer heat-flux width scaling for tokamak inner-wall limited plasmas

F D Halpern, J Horacek, R A Pitts, P Ricci
2016 Plasma Physics and Controlled Fusion  
The International Tokamak Physics Activity Topical Group on scrape-off layer and divertor physics has amassed a database comprising hundreds of reciprocating Langmuir probe measurements of the main scrape-off  ...  We have carried out an analysis, based on turbulent transport theory, of the variation of λ q with respect to the dimensionless plasma parameters.  ...  Stimulated by these observations, the scrape-off-layer and divertor topical group of the International Tokamak Physics Activity (ITPA) embarked on a multi-machine database effort to characterize the main  ... 
doi:10.1088/0741-3335/58/8/084003 fatcat:tkbslpjlvzasjbmhfjno554ddu

3D simulations of gas puff effects on edge plasma and ICRF coupling in JET

W. Zhang, P. Jacquet, E. Lerche, R. Bilato, V. Bobkov, D. Coster, Y. Feng, C. Guillemaut, M. Goniche, D. Harting, T. Lunt, J.-M. Noterdaeme (+2 others)
2017 Nuclear Fusion  
Acknowledgments This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement  ...  The views and opinions expressed herein do not necessarily reflect those of the European Commission.  ...  The local scrape-off Layer (SOL) density can be tailored by changing the gas puff locations and the gas puff rate.  ... 
doi:10.1088/1741-4326/aa6817 fatcat:i35kjtwf5zbxbozfak35pr44rq

Two-dimensional imaging of edge-localized modes in KSTAR plasmas unperturbed and perturbed by n=1 external magnetic fields

G. S. Yun, W. Lee, M. J. Choi, J. Lee, H. K. Park, C. W. Domier, N. C. Luhmann, B. Tobias, A. J. H. Donné, J. H. Lee, Y. M. Jeon, S. W. Yoon
2012 Physics of Plasmas  
The temporal evolution of edge-localized modes (ELMs) has been studied using a 2-D electron cyclotron emission imaging system in the KSTAR tokamak.  ...  filaments, and the final crash through a short transient phase characterized by abrupt changes in the relative amplitudes and distance among filaments.  ...  Linda Sugiyama for providing theoretical and simulation perspectives on the ELM filament dynamics and Professor Paul Bellan for discussions on the magnetic reconnection physics in the context of ELM crashes  ... 
doi:10.1063/1.3694842 fatcat:2zvacvbssrdf7jeweyjrl2x2za

Newly uncovered physics of MHD instabilities using 2-D electron cyclotron emission imaging system in toroidal plasmas

Hyeon K. Park
2019 Advances in Physics: X  
Validation of physics models using the newly uncovered physics with a 2-D electron cyclotron emission imaging (ECEi) system for magnetic fusion plasmas has either enhanced the confidence or substantially  ...  For the 2/ 1 instability, it is demonstrated that the 2-D data can determine critical physics parameters with a high confidence and the measured anisotropic distribution of the turbulence and its flow  ...  Disclosure statement No potential conflict of interest was reported by the author.  ... 
doi:10.1080/23746149.2019.1633956 fatcat:4s3o2iw7ufggjepth3tytbjvhe

The advanced tokamak path to a compact net electric fusion pilot plant

Richard J Buttery, Jin Myung Park, Joseph McClenaghan, David B Weisberg, John M Canik, John R Ferron, Andrea M Garofalo, Chris T Holcomb, Jim A Leuer, Philip B Snyder
2021 Nuclear Fusion  
Physics-based simulations project a compact net electric fusion pilot plant with a nuclear testing mission is possible at modest scale based on the advanced tokamak concept, and identify key parameters  ...  In particular, the levering role of high plasma density is identified, which raises fusion performance and self-driven 'bootstrap currents', to reduce current drive demands and enable high pressure with  ...  We would like to thank Hartmut Zohm for informative discussion and some of the inspiration behind this paper, and Mickey Wade and Craig Petty for helpful discussions in preparation of the paper, as well  ... 
doi:10.1088/1741-4326/abe4af fatcat:uocp4y5e5rd2fjl5mefhwp6rzm

DIII-D Research to Prepare for Steady State Advanced Tokamak Power Plants

R. J. Buttery, B. Covele, J. Ferron, A. Garofalo, C. T. Holcomb, T. Leonard, J. M. Park, T. Petrie, C. Petty, G. Staebler, E. J. Strait, M. Van Zeeland
2018 Journal of fusion energy  
b influence plasma turbulence in order to validate and improve turbulent transport models, and understanding the physics of energetic particle redistribution due to Alfvénic and other instabilities.  ...  The advanced tokamak represents a highly attractive approach for a future steady state fusion power plant.  ...  , and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.  ... 
doi:10.1007/s10894-018-0185-y fatcat:ajmbn66irjeqvdvp3eoj2zi7je

Physics conclusions in support of ITER W divertor monoblock shaping

R.A. Pitts, S. Bardin, B. Bazylev, M.A. van den Berg, P. Bunting, S. Carpentier-Chouchana, J.W. Coenen, Y. Corre, R. Dejarnac, F. Escourbiac, J. Gaspar, J.P. Gunn (+17 others)
2017 Nuclear Materials and Energy  
As a result, a coordinated multi-experiment and simulation effort was initiated via the International Tokamak Physics Activity (ITPA) and through ITER contracts, aimed at improving the physics basis supporting  ...  The key remaining physics design issue for the ITER tungsten (W) divertor is the question of monoblock (MB) front surface shaping in the high heat flux target areas of the actively cooled targets.  ...  Acknowledgements The views and opinions expressed herein do not necessarily reflect those of the ITER Organization and of the European Commission. ITER is the nuclear facility INB 174.  ... 
doi:10.1016/j.nme.2017.03.005 fatcat:tz6ztytqnjfmtheyyoetgf6ola
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