Results 21 to 30 of about 193 (152)

Shattered pellet injection simulations with NIMROD

Physics of Plasmas, 2019
Optimal strategies for disruption mitigation benefit from the understanding of details both spatially and temporally. Beyond the assessment of the efficacy of a particular proposed Disruption Mitigation System (DMS), ITER's longevity will require accounting of both mitigated and unmitigated disruptions.
Charlson C. Kim, Yueqiang Liu, Paul B. Parks, Lang L. Lao, Michael Lehnen, Alberto Loarte   +5 more
openaire   +2 more sources

Hot-tail electrons’ impact on assimilation and injection penetration of D2 shattered pellet injections

Nuclear Fusion, 2022
Abstract The assimilation and the penetration of injected materials play significant roles in the mitigation efficiency of shattered pellet injection (SPI) as a disruption mitigation system (DMS), hence an accurate description of the fragment ablation rate is desirable.
D. Hu, C. Liu, null the JOREK Team
openaire   +2 more sources

First predictive simulations for deuterium shattered pellet injection in ASDEX Upgrade [PDF]

Physics of Plasmas, 2020
First simulations of deuterium shattered pellet injection into an ASDEX Upgrade H-Mode plasma with the JOREK MHD code are presented. Resistivity is increased by one order of magnitude in most simulations to reduce computational costs and allow for extensive parameter scans.
M. Hoelzl, D. Hu, E. Nardon, G. T. A. Huijsmans   +3 more
openaire   +4 more sources

Harnessing Thin‐Film Solid‐State Electrolytes: Enabling Breakthroughs in All‐Solid‐State Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Schematic illustration highlighting the advantages of transitioning from traditional thick solid‐state electrolytes (SSEs) to thin‐film SSEs. Thinning the electrolyte enables higher ionic conductivity, reduced interfacial polarization, improved flexibility, compact electrode contact, and enhanced energy density, offering a promising pathway toward high‐
Yitao He, Haoyang Cheng, Li Wang, Xiangming He   +3 more
wiley   +1 more source

Impact of impurity seeding on shattered pellet injection mitigations on the Joint European Torus

Nuclear Fusion
Plasma disruptions present a significant challenge to the viability of fusion energy production in tokamak reactors. Among disruption mitigation techniques, shattered pellet injection (SPI) has emerged as a promising approach.
U. Sheikh, S. Jachmich, M. Kong, G. Bodner, N. Eidietis, O. Ficker, M. Lehnen, C. Reux, B. Stein-Lubrano, J. Svoboda, JET Contributors, the EUROfusion Tokamak Exploitation Team   +11 more
doaj   +1 more source

Strategies and mechanisms of precision genome engineering: From gene editing to genome writing

iMetaOmics, EarlyView.
In this review, we examined the progression of genome manipulation from stochastic nuclease‐mediated cutting toward precise editing and programmable genome writing. We discussed tools like multi‐kilobase RNA‐guided integrators and Artificial Intelligence (AI)‐designed effectors and showed how these advances enable researchers to treat genomes as ...
Kerui Huang, Jianhong Tian, Wenyan Zhao, Siqin Zhang, Lixuan Xiang, Meiqing Yang, Lu Liu, Yazhou Huang, Ningyun Zhang, Lei Sun, Peng Xie, Nanyu Kuang, Hong Zhou, Chengfeng Qiu, Jun Yan, Xiaocheng Jiang, Qiang Tu, Yun Wang, Haoliang Hu, Youming Zhang   +19 more
wiley   +1 more source

Impact of breech geometry and propellant flow on the release of large pellets for the ITER disruption mitigation system

Nuclear Fusion
Studies have been performed on the release mechanism for large pellets using high pressure gas in a shattered pellet injector. Typically, pellets are dislodged from the cryogenic surface and accelerated down a barrel using high pressure gas delivered by ...
T.E. Gebhart, L.R. Baylor, M. Dibon, M.N. Ericson, E.J. Felske, S.S. Frank, W.L. Gardner, A.G. Ghiozzi, S. Jachmich, U. Kruezi, M. Lehnen, D.A. Velez   +11 more
doaj   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Reduced kinetic modelling of shattered pellet injection in ASDEX upgrade

Journal of Plasma Physics
Plasma-terminating disruptions represent a critical outstanding issue for reactor-relevant tokamaks. ITER will use shattered pellet injection (SPI) as its disruption mitigation system to reduce heat loads, vessel forces and to suppress the formation of runaway electrons.
Halldestam, Peter, Heinrich, Paul, Papp, Gergely, Hoppe, Mathias, Hoelzl, Matthias, Pusztai, István, Vallhagen, Oskar, Fischer, Rainer, Jenko, Frank, Team, the ASDEX Upgrade, Team, the EUROfusion Tokamak Exploitation   +10 more
openaire   +3 more sources

Analysis of the Shattered Pellet Injection Fragment Plumes Generated by Machine Specific Shatter Tube Designs

Fusion Science and Technology, 2020
Shattered pellet injector systems have been installed on DIII-D, JET, and KSTAR and used to experimentally determine the effectiveness of the shattered pellet injection (SPI) process in mitigating ...
T. E. Gebhart, L. R. Baylor, S. J. Meitner   +2 more
openaire   +2 more sources