Results 1 to 10 of about 18,093 (183)

Coupled IMPGYRO-EDDY simulation of tungsten impurity transport in tokamak geometry

Journal of Nuclear Materials, 2009
Abstract We are developing a Monte Carlo transport code, ‘IMPGYRO’ for high- Z impurities. The code includes most of important process of high- Z impurities: (1) the finite Larmor radius effect in realistic tokamak geometries, (2) Coulomb collision of impurity ions with background ions and (3) multi-step ionization/recombination process.
M. Toma, K. Hoshino, K. Inai, M. Furubayashi, A. Hatayama, K. Ohya   +5 more
  +8 more sources

Interpretative modeling of impurity transport and tungsten sources in WEST boundary plasma [PDF]

Nuclear Fusion, 2021
The contamination of core plasma by high-Z impurities, especially tungsten (W), is the main reason of very high level of radiated power in WEST experiments. Intrinsic light impurities, mainly oxygen and carbon, play a dominant role in the sputtering of W on plasma facing components.
G. Ciraolo, S. Di Genova, H. Yang, A. Gallo, N. Fedorczak, H. Bufferand, J.P. Gunn, P. Tamain, R. Guirlet, C. Guillemaut, C. Desgranges, C. Bourdelle, E. Tsitrone, J. Bucalossi, M. Scotto D’Abusco, E. Serre, Y. Marandet, M. Raghunathan, A. Sepetys, J. Romazanov, A. Kirschner, S. Brezinsek, the WEST Team   +22 more
openaire   +5 more sources

DIVIMP modeling of tungsten impurity transport in ITER [PDF]

Journal of Nuclear Materials, 2007
This paper presents a modeling study of the W erosion and plasma accumulation in ITER for different levels of first wall W coverage and plasma configurations using the Monte Carlo impurity transport code DIVIMP. Based on the ion fluxes from the background plasma solutions from B2/EIRENE the W erosion is calculated by taking into account both D and ...
Schmid, K., Krieger, K., Kukushkin, A., Loarte, A.   +3 more
openaire   +3 more sources

Tungsten core accumulation study in EAST plasma with lower tungsten divertor by kinetic impurity transport model

Nuclear Materials and Energy, 2022
Tungsten (W) impurity transport and the corresponding core W accumulation is a critical issue in tokamak with W as plasma facing material. In this work, a kinetic W impurity transport code based on the guiding center approximation is applied for the study. The background plasma and simulation mesh are provided by 2D fluid code SOLPS.
Yihan Wu, Qingrui Zhou, Chaofeng Sang, Yanjie Zhang, Yilin Wang, Dezhen Wang   +5 more
openaire   +2 more sources

Overview of ASDEX Upgrade results [PDF]

, 2017
The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design.
ASDEX Upgrade Team, EUROfusion MST1 Team, Mantsinen, Mervi   +2 more
core   +4 more sources

Impurity transport and halo current effects on tungsten divertor system

Journal of Radiation Research and Applied Sciences, 2020
This paper presents the development of theoretical model for the purpose to calculate and analyze halo and eddy current effects in the tungsten divertor of Tokamak (Fusion) reactor.
Shahab Ud-Din Khan, Salah- Ud-Din Khan, Saleh O.Alaswad, Yuntao Song, Shahid Hussain, Riaz Khan   +5 more
openaire   +1 more source

Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST

Nuclear Materials and Energy, 2022
Tungsten (W) erosion and edge transport are investigated for EAST L-mode discharges with different gas injection. It is found that W erosion can be suppressed or mitigated by Ne or D2 seeding when divertor detachment is achieved. Compared to edge D2 fueling, Ne seeding from the divertor target is favorable for full detachment condition and thus W ...
Ding, R., Xu, G. L., Wang, S. X., Gao, B. F., Meng, L. Y., Wang, L., Xie, H., Si, H., Yan, R., Zhu, D. H., Chen, J. L., Wang, H., Ding, F., Zhang, L., Zhang, Q., Li, K. D., Liu, J. B., Brezinsek, S., Kirschner, A.   +18 more
openaire   +3 more sources

Gaussian process tomography for soft x-ray spectroscopy at WEST without equilibrium information [PDF]

, 2018
International audienceGaussian process tomography (GPT) is a recently developed tomography method based on the Bayesian probability theory [J. Svensson, JET Internal Report EFDA-JET-PR(11)24, 2011 and Li et al., Rev. Sci. Instrum. 84, 083506 (2013)].
Jardin, A., Li, D., Mazon, D., Svensson, J., Verdoolaege, Geert, Wang, TianBo   +5 more
core   +3 more sources

Effects of the equilibrium model on impurity transport in tokamaks [PDF]

, 2013
Gyrokinetic simulations of ion temperature gradient mode and trapped electron mode driven impurity transport in a realistic tokamak geometry are presented and compared with results using simplified geometries.
Anderson, Johan, Fazendeiro, Luis, Nordman, Hans, Skyman, Andreas, Strand, Pär, Tegnered, Daniel   +5 more
core   +2 more sources

Comparison of kinetic and fluid models for tungsten impurity transport using IMPGYRO and SOLPS [PDF]

Journal of Nuclear Materials, 2013
Abstract A benchmark calculation of tungsten impurity transport comparing kinetic modeling with IMPGYRO and multi-fluid modeling with SOLPS has been performed. The primary source of tungsten has been set at the outer mid-plane in the calculations. In both cases, impurity densities are relatively large in the SOL region near the top of the machine ...
Toma, M., Bonnin, X., Sawada, Y., Homma, Y., Hatayama, A., Hoshino, K., Coster, D., Schneider, R.   +7 more
openaire   +3 more sources