Results 21 to 30 of about 144 (106)

First EMC3-Eirene simulations of the TCV snowflake divertor [PDF]

Plasma Physics and Controlled Fusion, 2014
One of the approaches to solve the heat load problem in a divertor tokamak is the so called 'snowflake' (SF) configuration, a magnetic equilibrium with two nearby x-points and two additional divertor legs. Here we report on the first EMC3-Eirene simulations of plasma-and neutral particle transport in the scrape-off layer of a series of TCV SF ...
Lunt, T., Canal, G., Feng, Y., Reimerdes, H., Duval, B., Labit, B., Vijvers, W., Coster, D., Lackner, K., Wischmeier, M.   +9 more
openaire   +2 more sources

EMC3-Eirene simulations of the tungsten injection experiments in Tore Supra [PDF]

Journal of Nuclear Materials, 2013
Abstract We report on the first full 3D EMC3-Eirene simulations of the bulk plasma, neutral gas and W impurity transport in Tore Supra (TS). Three configurations are addressed: (A) the high field side-, (B) bottom- and (C) low field side limited case and compared to Mach probe measurements at the top of the device.
Lunt, T., Kocan, M., Gunn, J., Feng, Y., Meyer, O.   +4 more
openaire   +3 more sources

Integration of kinetic ions in a three‐dimensional Monte‐Carlo neutral transport code

Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020
Abstract Charged particles of species different from the major constituents of a plasma might not reach local thermodynamic equilibrium during their lifespan. Such low collisional ions render the often‐used fluid description, assuming Maxwellian velocity distribution, as insufficient. Hence, kinetic treatment of such minorities becomes inevitable.
Friedrich Schluck
wiley   +1 more source

Plasma response impact on RMP divertor footprint modeling for KSTAR

Nuclear Materials and Energy, 2023
The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs).
H. Frerichs, J. Van Blarcum, S.M. Yang, J-K. Park, N.C. Logan, Y. Feng, O. Schmitz   +6 more
doaj   +1 more source

Experimental observations and modelling of radiation asymmetries during N2 seeding in LHD

Nuclear Materials and Energy, 2021
N2 gas has been seeded in the Large Helical Device (LHD) to reduce the divertor heat load through enhanced radiation. Radiation is observed by two imaging bolometers, viewing the same poloidal cross-section from top and bottom ports, at a location which ...
B.J. Peterson, G. Kawamura, P.L. van de Giessen, K. Mukai, H. Tanaka, R. Sano, S.N. Pandya, S.Y. Dai, S. Masuzaki, T. Akiyama, M. Kobayashi, M. Goto, G. Motojima, R. Sakamoto, N. Ohno, T. Morisaki, J. Miyazawa   +16 more
doaj   +1 more source

Synthetic plasma edge diagnostics for EMC3-EIRENE, highlighted for Wendelstein 7-X [PDF]

Review of Scientific Instruments, 2016
Interpretation of spectroscopic measurements in the edge region of high-temperature plasmas can be a challenge since line of sight integration effects make direct interpretation in terms of quantitative, local emission strengths often impossible. The EMC3-EIRENE code—a 3D fluid edge plasma and kinetic neutral gas transport code—is a suitable tool for ...
H. Frerichs, F. Effenberg, O. Schmitz, C. Biedermann, Y. Feng, M. Jakubowski, R. König, M. Krychowiak, J. Lore, H. Niemann, T. S. Pedersen, L. Stephey, G. A. Wurden   +12 more
openaire   +3 more sources

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   +7 more sources

Estimations of edge plasma and impurity performance on HL-2M with EMC3-EIRENE modelling

Physica Scripta, 2021
Abstract The three-dimensional edge transport code EMC3-EIRENE has been employed to investigate the edge plasma behavior and carbon impurity transport in the HuanLiuqi-2M (HL-2M) tokamak. It is found that the outboard divertor target has a narrower flux deposition width and therefore undergoes more intense peak ...
Z Liang, S Y Dai, Y Feng, D Z Wang
openaire   +2 more sources

Toroidally symmetric/asymmetric effect on the divertor flux due to neon/nitrogen seeding in LHD

Nuclear Materials and Energy, 2017
Toroidal distributions of divertor particle flux during neon (Ne) and nitrogen (N2) seeded discharges were investigated in the Large Helical Device (LHD).
H. Tanaka, G. Kawamura, S. Masuzaki, M. Kobayashi, T. Akiyama, B.J. Peterson, K. Mukai, R. Sano, S.Y. Dai, R. Sakamoto, T. Morisaki, N. Ohno   +11 more
doaj   +1 more source

Three-dimensional structure of radiative cooling in impurity seeded plasmas in the Large Helical Device

Nuclear Materials and Energy, 2022
Three-dimensionally localization of radiative cooling due to nitrogen (N2) seeding for divertor detachment was detected experimentally. Since the localization along some magnetic field lines induces toroidal asymmetry of heat load reduction on divertor ...
K. Mukai, G. Kawamura, S. Masuzaki, Y. Hayashi, H. Tanaka, B.J. Peterson, T. Oishi, C. Suzuki, M. Kobayashi, K. Munechika   +9 more
doaj   +1 more source