Results 61 to 70 of about 9,791 (334)

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

Novel inferences of ionisation & recombination for particle/power balance during detached discharges using deuterium Balmer line spectroscopy

, 2019
The physics of divertor detachment is determined by divertor power, particle and momentum balance. This work provides a novel analysis technique of the Balmer line series to obtain a full particle/power balance measurement of the divertor.
Bowman, C., Duval, B. P., Fil, A., Gahle, D. S., Lipschultz, B., Verhaegh, K., Wensing, M.   +6 more
core   +1 more source

Magnetothermal‐Triggered Response and Self‐Healing of Recyclable and Reprocessable Nanocomposites for Actuation Systems

Advanced Functional Materials, EarlyView.
Developing recyclable materials for magnetic robotics that combine rapid response and self‐healing properties is challenging. Hence, this study focuses on the integration of magnetothermal nanoparticles into a dynamic sorbitol‐based vitrimer, a recyclable composite capable of remote actuation and self‐healing by magnetic heating.
Maria Weißpflog, Gloria Signorato, Birgit Hankiewicz, Volker Abetz   +3 more
wiley   +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

Feedback system for divertor impurity seeding based on real-time measurements of surface heat flux in the Alcator C-Mod tokamak [PDF]

, 2016
Mitigation of the intense heat flux to the divertor is one of the outstanding problems in fusion energy. One technique that has shown promise is impurity seeding, i.e., the injection of low-Z gaseous impurities (typically N2 or Ne) to radiate and ...
Brunner, D., Burke, W., Kuang, A. Q., LaBombard, B., Lipschultz, B., Wolfe, S.   +5 more
core   +1 more source

Nanoparticle Shape Dictates Catalytic Performance in Selective Hydrogenation of Butadiene Over Au‐Pd Core‐Shell Nanoparticles

Advanced Functional Materials, EarlyView.
Controlling the exposed crystal facet of shape‐controlled Au‐Pd core‐shell catalysts though colloidal synthesis enhances their catalytic performance in the industrially relevant selective hydrogenation of butadiene. ABSTRACT Selective hydrogenation of butadiene is a critical step in purification of alkene feedstocks for polymer production and is ...
Marta Perxés Perich, Jan‐Willem Lankman, Petra E. de Jongh, Jessi E. S. van der Hoeven   +3 more
wiley   +1 more source

Exploring Pb‐Chelation Chemistry in the Crystallization Dynamics of Halide Perovskites

Advanced Functional Materials, EarlyView.
A mechanism of how Pb‐chelation chemistry governs coordination geometry and initial nucleation behavior at the precursor level of halide perovskite, by regulating the deprotonation state of a chelating additive, is elucidated. This allows for innovative reaction‐system design principles that promote coherent growth while suppressing defect formation in
Byeong Jun Kim, Inseo Cho, Jung Geon Son, Yifan Yu, Gunhee Kim, Eunseo Shin, Seyeon Eom, Minsub Um, Subeom Shin, Hyungju Ahn, Dong Suk Kim, Hochan Song, Hyosung Choi, Jonghee Yang   +13 more
wiley   +1 more source

SOLPS-ITER drift modelling of JET Ne and N-seeded H-modes

Nuclear Materials and Energy, 2021
A numerical study is presented, using the SOLPS-ITER plasma boundary code with full drifts and currents activated, of impurity seeded JET discharges in support of high power H-mode experimental campaigns designed to compare two ITER candidate seeding ...
Elizaveta Kaveeva, Vladimir Rozhansky, Irina Veselova, Ilya Senichenkov, Carine Giroud, Richard A. Pitts, Sven Wiesen, Serguey Voskoboynikov   +7 more
doaj   +1 more source

Contrasting H-mode behaviour with fuelling and nitrogen seeding in the all-carbon and metallic versions of JET [PDF]

, 2013
An all-metal ITER-Like Wall (JET-ILW), consisting of beryllium in the main chamber and tungsten surfaces in the divertor, has now been installed in JET to pursue low retention of fuel species and to explore the impact on next-step-relevant plasmas.
A. Järvinen, A. Meigs, C. Giroud, C. Lowry, F. Rimini, G. Maddison, JET EFDA contributors, K. McCormick, L. Garzotti, M. Beurskens, M. Stamp, M. Wischmeier, P. Devynck, S. Brezinsek, S. Jachmich, S. Marsen, T. Eich   +16 more
core   +2 more sources

Fluorescent Nanosensor for Indole‐3‐Propionic Acid Detection in Gut Health Monitoring

Advanced Healthcare Materials, EarlyView.
This work introduces a fluorescent nanosensor system with two optical modalities for detection of indole‐3‐propionic acid (IPA) gut metabolite: (1) blue‐emitting cationic conjugated polyelectrolyte (CP3) and (2) near‐infrared (NIR)‐emitting CP3‐wrapped single‐walled carbon nanotube (SWNT).
Mervin Chun‐Yi Ang, Jonathan Wei Jie Lee, Sayyid Mohaideen, Gabriel Sánchez‐Velázquez, Song Wang, Yangyang Han, Liu Lin, Germaine Yong, Raju Cheerlavancha, Duc Thinh Khong, Jianhong Ching, Sharon Hong Yu Han, Jun Yu Yeo, Lian Xu, Gajendra Pratap Singh, Michael S. Strano   +15 more
wiley   +1 more source