Results 31 to 40 of about 1,348 (158)

The effects of impurity gas seeding on the growth of fuzzy tungsten

Journal of Nuclear Materials, 2021
Abstract Using the linear plasma device NAGDIS-II operating with gas mixtures of helium (He) and impurity (Ne, N 2 , Ar), fibre-form nanostructures known as “fuzz” have been grown on tungsten (W) samples. In this system, fuzzy W was grown over a range of sample temperatures and ion fluences (containing He and impurity ion mixtures), but with ...
Patrick McCarthy, Dogyun Hwangbo, Shin Kajita, James W. Bradley   +3 more
openaire   +1 more source

Gyrokinetic simulations of electrostatic microturbulence in ADITYA-U tokamak with argon impurity

Nuclear Fusion
The effect of impurity on the electrostatic microturbulence in ADITYA-U tokamak is assessed using global gyrokinetic simulations. The realistic geometry and experimental profiles of the ADITYA-U are used, before and after argon gas seeding, to perform ...
Tajinder Singh, Kajal Shah, Deepti Sharma, Joydeep Ghosh, Kumarpalsinh A. Jadeja, Rakesh L. Tanna, M.B. Chowdhuri, Zhihong Lin, Abhijit Sen, Sarveshwar Sharma, Animesh Kuley   +10 more
doaj   +1 more source

Modelling of the X-point radiator configuration in DTT with SOLEDGE2D-Eirene

Nuclear Materials and Energy
This work studied the feasibility of an X-point radiator (XPR) in the DTT single-null full-power scenario using the edge modelling code SOLEDGE2D-EIRENE.
L. Balbinot, G. Rubino, I. Casiraghi, G. Calabrò, P. Innocente   +4 more
doaj   +1 more source

Transport analysis of high radiation and high density plasmas in the ASDEX Upgrade tokamak

EPJ Web of Conferences, 2014
Future fusion reactors, foreseen in the “European road map” such as DEMO, will operate under more demanding conditions compared to present devices. They will require high divertor and core radiation by impurity seeding to reduce heat loads on divertor ...
Casali L., Bernert M., Dux R., Fischer R., Kallenbach A., Kurzan B., Lang P., Mlynek A., McDermott R.M., Ryter F., Sertoli M., Tardini G., Zohm H.   +12 more
doaj   +1 more source

Nonlinear edge-localized mode with impurity seeding in CFETR hybrid scenario

Nuclear Fusion
A critical challenge for operating fusion burning plasma in high-confinement mode lies in mitigating damage caused by edge-localized modes (ELMs).
Shiyong Zeng, Ping Zhu
doaj   +1 more source

Divertor detachment and reattachment with mixed impurity seeding on ASDEX Upgrade

Nuclear Fusion, 2023
Using newly developed spectroscopic models to measure the divertor concentration of Ne and Ar, it is shown that the experimental detachment threshold on ASDEX Upgrade with Ar-only and mixtures of Ar+N or Ne+N scales as expected in comparison with an ...
S.S. Henderson, M. Bernert, D. Brida, M. Cavedon, P. David, R. Dux, O. Février, A. Järvinen, A. Kallenbach, M. Komm, R. McDermott, M. O’Mullane, the ASDEX Upgrade Team, the EUROfusion MST1 Team   +13 more
doaj   +1 more source

Impact of nitrogen seeding on L–H transitions and their role for detachment in ASDEX Upgrade

Nuclear Fusion
The required heating power, $P_{\mathrm{LH}}$ , to access the high confinement regime (H-mode) in nitrogen seeded deuterium plasmas is investigated at the ASDEX Upgrade tokamak. It is shown that a stepwise increase of the nitrogen seeding level increases
G. Birkenmeier, M. Bernert, D. Brida, P. David, R. Fischer, T. Happel, B. Kurzan, T. Lunt, F. Ryter, E. Wolfrum, the ASDEX Upgrade Team   +10 more
doaj   +1 more source

Comparative studies of tungsten erosion and edge transport under partially detached divertor condition of CFETR with neon and argon seedings

Nuclear Materials and Energy
Neon (Ne) and argon (Ar) impurity seedings are recognized as effective techniques for reducing the divertor heat load in high-power operations of future reactors like CFETR.
Hui Wang, Guoliang Xu, Rui Ding, Hang Si, Guozhang Jia, Jin Guo, Jinheng Zhao, Junling Chen   +7 more
doaj   +1 more source

Global gyrokinetic simulations of electrostatic microturbulent transport in LHD stellarator with boron impurity

Nuclear Fusion, 2023
Global gyrokinetic simulations of electrostatic microturbulent transport for discharge # 166256 of the Large Helical Device stellarator in the presence of boron impurity show the co-existence of the ion temperature gradient (ITG) turbulence and trapped ...
Tajinder Singh, Javier H. Nicolau, Federico Nespoli, Gen Motojima, Zhihong Lin, Abhijit Sen, Sarveshwar Sharma, Animesh Kuley   +7 more
doaj   +1 more source

Radiative divertor detachment and impurity transport with nitrogen and neon seeding in KSTAR H-mode plasmas

Nuclear Fusion
Achieving core-edge compatible divertor detachment is a critical requirement for stable operation in future fusion devices. This study compares nitrogen and neon seeding in KSTAR H-mode plasmas with carbon walls, combining experiments and SOLPS-ITER ...
Junghoo Hwang, Hyungho Lee, Richard A. Pitts, Andrei Pshenov, Jae-Sun Park, Yoon Seong Han, June-Woo Juhn, Matthias Bernert, Jun-Gyo Bak, Suk-Ho Hong, Wonho Choe   +10 more
doaj   +1 more source