Results 41 to 50 of about 337 (131)

Removal of deuterium retention by various helium discharge cleanings under strong magnetic field in EAST superconducting tokamak

Nuclear Materials and Energy
Fuel (deuterium) removal by various helium (He) discharge cleanings under strong magnetic field are studied in EAST superconducting tokamak, including deuterium-to-helium changeover by main plasma operation, glow discharge cleaning (GDC), and ion ...
Yaowei Yu, Hao Sun, Chao Wang, Bin Cao, Guizhong Zuo, Jiansheng Hu   +5 more
doaj   +1 more source

Measurements of Auroral Plasma Properties Using Low‐Cost, Mobile, Ground‐Based Detectors

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract An expedition to Fairbanks, AK, was undertaken to study the aurora during the peak of solar cycle 25. Low‐cost diagnostics were developed to enable ground‐based measurements of ionospheric plasma parameters and auroral phenomena, namely a compact spectrometer and a high‐resolution all‐sky camera with 2‐axis magnetometer. Observations were made
S. Mackie, J. Rivera, T. Evans, J. L. Ball, S. Dannhoff, J. Heinzel, J. Van de Lindt, S. Moroch   +7 more
wiley   +1 more source

Cross-tokamak disruption prediction based on domain adaptation

Nuclear Fusion
The high acquisition cost and the significant demand for disruptive discharges for data-driven disruption prediction models in future tokamaks pose an inherent contradiction in disruption prediction research.
Chengshuo Shen, Wei Zheng, Bihao Guo, Yonghua Ding, Dalong Chen, Xinkun Ai, Fengming Xue, Yu Zhong, Nengchao Wang, Biao Shen, Binjia Xiao, Zhongyong Chen, Yuan Pan, J-TEXT Team   +13 more
doaj   +1 more source

Long-pulse H-mode operation with stored-energy monitoring for detachment feedback control with a new lower tungsten divertor in EAST

Nuclear Fusion, 2023
One of the key challenges for future fusion research is to mitigate the high steady-state heat load on the divertor target plates, and divertor detachment offers a promising solution. The Experimental Advanced Superconducting Tokamak (EAST) has developed
Y.Q. Tao, G.S. Xu, K. Wu, Q.Q. Yang, L. Wang, Q.P. Yuan, Y.F. Wang, X. Lin, L.Y. Meng, G.F. Ding, L. Yu, R. Chen, J.B. Liu, N. Yan, H. Lan, P.J. Sun, K.D. Li, J.C. Xu, Y.M. Duan, Q. Zang, Y.F. Jin, L. Zhang, S.X. Wang, K.N. Geng, R.R. Liang   +24 more
doaj   +1 more source

Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation

Advanced Materials Interfaces, Volume 12, Issue 10, May 19, 2025.
A novel and efficient method is explored to synthesize 1D single‐crystal sub‐stoichiometric WnO3n‐2 (n = 25) nanowire bundles. The approach utilizes selective low‐energy He+ ion irradiation (27 eV) on Mo‐Ni doped WOx surface, achieving efficient catalyst‐free self‐organized growth of high aspect ratio nanowires at the temperature of 700 °C.
Maryna Bilokur, Matt Thompson, Matthew Arnold, Cormac Corr   +3 more
wiley   +1 more source

A New Approach Toward Extreme Thermal Stability of Femtosecond Laser Induced Modifications in Glasses

Laser &Photonics Reviews, Volume 19, Issue 3, February 5, 2025.
Femtosecond laser irradiation inside Al2O3‐SiO2 and ZrO2‐Al2O3‐SiO2 glasses can induce polarization‐controlled birefringent nanostructures, along with local precipitation of refractory nanocrystals like tetragonal ZrO2 or mullite. These structures yield a persisting positive index contrast with extraordinary thermal stability (>1600 °C), opening a ...
Imane Ktafi, Jing Kong, Maxime Cavillon, Bertrand Poumellec, Maureen Yembele, Renaud Valois, Mathieu Allix, Gang‐Ding Peng, Matthieu Lancry   +8 more
wiley   +1 more source

Ion‐Mediated Tearing and Kink Instabilities in the Earth's Magnetosphere: Hybrid‐Vlasov Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract We explore the three‐dimensional structure of ion‐kinetic instabilities in a thin current layer using a hybrid‐Vlasov simulation of the Earth's magnetosphere. The simulation shows the simultaneous growth of tearing and kinking instabilities, which develop in the Sun‐Earth and dawn‐dusk directions, respectively, within the magnetotail current ...
I. Zaitsev, G. Cozzani, M. Alho, K. Horaites, H. Zhou, A. Kit, Y. Pfau‐Kempf, S. Hoilijoki, U. Ganse, M. Battarbee, K. Papadakis, J. Suni, M. Dubart, F. Tesema‐Kebede, A. Workayehu, V. Tarvus, L. Kotipalo, V. Koikkalainen, L. Turc, M. Palmroth   +19 more
wiley   +1 more source

Convective and Orographic Origins of the Mesoscale Kinetic Energy Spectrum

Geophysical Research Letters, Volume 51, Issue 21, 16 November 2024.
Abstract The mesoscale spectrum describes the distribution of kinetic energy in the Earth's atmosphere between length scales of 10 and 400 km. Since the first observations, the origins of this spectrum have been controversial. At synoptic scales, the spectrum follows a −3 spectral slope, consistent with two‐dimensional turbulence theory, but a ...
Salah Kouhen, Benjamin A. Storer, Hussein Aluie, David P. Marshall, Hannah M. Christensen   +4 more
wiley   +1 more source

Comparison of the scrape‐off layer two‐point model for deuterium and helium plasmas in JET ITER‐like wall low‐confinement plasma conditions

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract The hydrogenic two‐point model (H‐2PM), an analytical model for the scrape‐off layer that predicts a common electron and ion temperature and density along a flux tube from a target temperature and density, is adapted to a single‐species helium (He) model, preserving the 2PM assumptions and analytical nature.
David Rees, Joona Sissonen, Mathias Groth, Vesa‐Pekka Rikala, Henri Kumpulainen, Beth Thomas, Mathias Brix, JET Contributors   +7 more
wiley   +1 more source

Prediction of the kinetic profiles in H-mode plasma discharges on EAST using core-pedestal coupling

Scientific Reports
The physical processes in tokamak plasma are strongly related to the coupling between the core and the pedestal. The accurate prediction of the kinetic profiles (electron temperature and density) from the pedestal to the core lays the physics basis for ...
Chaotong Yang, Kai Li, Guoqiang Li, Yanjie Yang, Xiang Jian, Lin Yu, Tao Zhang, Qing Zang, Haiqing Liu, Xin Lin, Jilei Hou   +10 more
doaj   +1 more source