Results 21 to 30 of about 7,982 (306)

Experimental study of electron cyclotron heating assisted start-up on J-TEXT

Nuclear Fusion, 2023
Second harmonic X-mode (X2 mode) electron cyclotron heating (ECH) assisted start-up has been studied experimentally on the J-TEXT device to determine the minimum ECH power requirements to assist breakdown and develop a better physical description of the ...
Junli Zhang, Peter C de Vries, Kazunobu Nagasaki, Donghui Xia, Wei Jiang, Zhoujun Yang, Zhifeng Cheng, Li Gao, Xin Xu, Zhijiang Wang, Nengchao Wang, Yonghua Ding, Zhipeng Chen, Zhongyong Chen, Yuan Pan, J-TEXT Team   +15 more
doaj   +1 more source

WEST: Impact of wall conditions on impurity sources and core contamination for various plasma shapes*

Nuclear Materials and Energy
WEST’s unique characteristics with nearly all tungsten (W) PFCs offer an ideal platform to study plasma operations and plasma scenario development for long-pulsed, actively cooled, nearly all W-PFC tokamaks [1]. W erosion/redeposition of the PFCs and the
A. Grosjean, D.C. Donovan, P. Devynck, Fedorczak, A. Gallo, J. Gaspar, J. Gerardin, J.P. Gunn, C. Guillemaut, B. Guillermin, C.A. Johnson, S.R. Kosslow, P. Manas, S. Mazzi, D. Moiraf, P. Moreau, B. Putra, N. Rivals, E.A. Unterberg   +18 more
doaj   +1 more source

Advanced tools for plasma control in magnetic confinement fusion devices [PDF]

, 2022
openNel contesto dell'esperimento in via di sviluppo RFX-mod2, questo lavoro mira attentamente a valutare possibili condizioni critiche nella ricostruzione in tempo reale dei parametri di plasma (mediante il calcolo di momenti di ordine inferiore della ...
OSTOICH, NICOLA
core  

Calorimetry measurement for energy balance and energy distribution in WEST for L-mode plasmas

Nuclear Fusion
This paper presents the energy balance of 602 pulses from four different experimental campaigns for the WEST tokamak. Different magnetic configurations have been studied, with lower single null (LSN) and upper single null (USN) configuration with ...
J. Gaspar, J. Gerardin, Y. Corre, J. Daumas, N. Fedorczak, V. Lamaison, C. Bourdelle, G. Ciraolo, A. Ekedahl, A. Gallo, N. Rivals, E. Tsitrone, the WEST Team   +12 more
doaj   +1 more source

Identification of a double decay length (λqt) heat flux deposition shape with embedded thermal measurement and neural network

Nuclear Materials and Energy
The estimation of the heat flux density distribution profiles in tokamak devices is a very important research topic for edge plasma physics purposes and also to ensure the safety of the machine.
Y. Anquetin, J. Gaspar, Y. Corre, JL. Gardarein, J. Gerardin, P. Malard, F. Rigollet, Q. Tichit, E. Tsitrone   +8 more
doaj   +1 more source

Experimental and numerical modeling of plasma start-up assisted by electron drift injection on J-TEXT

Nuclear Fusion, 2023
Start-up is one of the critical phases for tokamak discharge. The electron drift injection (EDI) system has been developed on J-TEXT for start-up studies.
Junli Zhang, Zhifeng Cheng, Yanli Peng, Zhoujun Yang, Kazunobu Nagasaki, Nengchao Wang, Hao Cai, Yonghua Ding, Zhipeng Chen, Zhongyong Chen, Wei Jiang, Donghui Xia, Zhijiang Wang, Yuan Pan, J-TEXT team   +14 more
doaj   +1 more source

Brainstem and Cerebellar Volume Loss and Associated Clinical Features in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Progressive Supranuclear Palsy (PSP) is a neurodegenerative ‘tauopathy’ with predominating pathology in the basal ganglia and midbrain. Caudal tau spread frequently implicates the cerebellum; however, the pattern of atrophy remains equivocal.
Chloe Spiegel, Timothy P. Siejka, Cassandra Marotta, Josh J. Y. Lee, Kelly Bertram, Terence J. O'Brien, Meng Law, Lucy Vivash, Ian H. Harding   +8 more
wiley   +1 more source

Refining light impurity content estimates at the lower divertor based on experimental data in WEST

Nuclear Materials and Energy, 2023
WEST is an actively cooled, long-pulse tokamak with nearly all plasma-facing components (PFC) made of tungsten (W). One of the aims of WEST is to study plasma operation with W PFCs in preparation for long-pulse operation on W divertor devices like ITER ...
A. Grosjean, D.C. Donovan, C.A. Johnson, J.P. Gunn, C. Guillemaut, N. Fedorczak, C.C. Klepper, E.A. Unterberg   +7 more
doaj   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source