Results 11 to 20 of about 193 (152)

Runaway electron dynamics in ITER disruptions with shattered pellet injections

Nuclear Fusion
This study systematically explores the parameter space of disruption mitigation through shattered pellet injection in ITER with a focus on runaway electron (RE) dynamics, using the disruption modeling tool Dream .
O. Vallhagen, L. Hanebring, F.J. Artola, M. Lehnen, E. Nardon, T. Fülöp, M. Hoppe, S.L. Newton, I. Pusztai   +8 more
doaj   +4 more sources

Modelling of shattered pellet injection experiments on the ASDEX Upgrade tokamak

Nuclear Fusion
In a shattered pellet injection (SPI) system the penetration and assimilation of the injected material depends on the speed and size distribution of the SPI fragments.
Ansh Patel, A. Matsuyama, G. Papp, M. Lehnen, J. Artola, S. Jachmich, E. Fable, A. Bock, B. Kurzan, M. Hoelzl, W. Tang, M. Dunne, R. Fischer, P. Heinrich, the ASDEX Upgrade Team, the EUROfusion Tokamak Exploitation Team   +15 more
doaj   +6 more sources

Non-linear MHD modeling of shattered pellet injection in ASDEX Upgrade

Nuclear Fusion
Shattered pellet injection (SPI) is selected for the disruption mitigation system in ITER, due to deeper penetration, expected assimilation efficiency and prompt material delivery.
W. Tang, M. Hoelzl, M. Lehnen, D. Hu, F.J. Artola, P. Halldestam, P. Heinrich, S. Jachmich, E. Nardon, G. Papp, A. Patel, the ASDEX Upgrade Team, the EUROfusion Tokamak Exploitation Team, the JOREK Team   +13 more
doaj   +4 more sources

Peridynamic modelling of cryogenic deuterium pellet fragmentation for shattered pellet injection in tokamaks

Nuclear Fusion
Shattered pellet injection (SPI) is a promising method for controlling plasma disruptions in tokamaks. In this study, we present numerical modelling of the fragmentation of cryogenic deuterium pellets within the context of SPI, using the peridynamic (PD)
S.-J. Lee, E. Madenci, Yong-Su Na, P. de Marné, M. Dibon, P. Heinrich, S. Jachmich, G. Papp, T. Peherstorfer, the ASDEX Upgrade Team   +9 more
doaj   +3 more sources

Multi-device analysis of energy loss duration and pellet penetration with implications for shattered pellet injection in ITER

Nuclear Fusion
A robust disruption mitigation system (DMS) requires accurate characterization of key disruption timescales, one of the most notable being the thermal quench (TQ).
G. Bodner, N. Eidietis, Z. Chen, P. Heinrich, J. Herfindal, S. Jachmich, G. Papp, J. Kim, M. Lehnen, U. Sheikh, I. Coffey, O. Ficker, S. Gerasimov, V. Kachkanov, C. Reux, S. Silburn, H. Sun, the ASDEX Upgrade Team, JET Contributors, the EUROfusion Tokamak Exploitation Team   +19 more
doaj   +4 more sources

Effects on characteristics of plasma disruption mitigation using shattered pellet injection with different shatter tubes on EAST

Nuclear Fusion
Plasma disruptions present considerable risks to tokamak devices, necessitating the implementation of advanced mitigation techniques such as shattered pellet injection (SPI). This study examines the influence of various shatter tube designs on disruption
L. Li, J.S. Yuan, S.B. Zhao, Y.M. Duan, H.D. Zhuang, D.L. Chen, A. Ti, W. Xia, S.T. Mao, F.D. Wang, T.H. Shi, J.H. Yang, B. Zhang, M. Huang, Y. Chen, G.Z. Zuo, J.S. Hu   +16 more
doaj   +2 more sources

Physics of runaway electrons with shattered pellet injection at JET

Plasma Physics and Controlled Fusion, 2022
Abstract Runaway electrons (REs) created during tokamak disruptions pose a threat to the reliable operation of future larger machines. Experiments using shattered pellet injection (SPI) have been carried out at the JET tokamak to investigate ways to prevent their generation or suppress them if avoidance is not sufficient.
C Reux, C Paz-Soldan, N Eidietis, M Lehnen, P Aleynikov, S Silburn, V Bandaru, O Ficker, M Hoelzl, E M Hollmann, S Jachmich, E Joffrin, P J Lomas, F Rimini, L Baylor, A Bleasdale, L Calacci, F Causa, D Carnevale, I Coffey, D Craven, A Dal Molin, E de la Luna, G De Tommasi, J Garcia, T Gebhart, L Giacomelli, A Huber, E Khilkevich, C Lowry, E Macusova, A Manzanares, M Nocente, E Panontin, G Papp, G Pautasso, A Peacock, V Plyusnin, A Shevelev, D Shiraki, C Sommariva, C Sozzi, S Sridhar, R Sweeney, G Szepesi, R A Tinguely, J Wilson   +46 more
openaire   +11 more sources

Design of the shattered pellet injection system for ASDEX Upgrade

Review of Scientific Instruments, 2023
A new shattered pellet injection system was designed and built to perform disruption mitigation experiments on ASDEX Upgrade. The system can inject pellets with diameters of 1, 2, 4, or 8 mm with variable lengths over a range of L/D ratios of ∼0.5–1.5.
M. Dibon, P. de Marne, G. Papp, I. Vinyar, A. Lukin, S. Jachmich, U. Kruezi, A. Muir, V. Rohde, M. Lehnen, P. Heinrich, T. Peherstorfer, D. Podymskii   +12 more
openaire   +3 more sources

Effect of two-stage shattered pellet injection on tokamak disruptions

Nuclear Fusion, 2022
Abstract An effective disruption mitigation system in a tokamak reactor should limit the exposure of the wall to localized heat losses and to the impact of high current runaway electron beams, and avoid excessive forces on the structure. We evaluate with respect to these aspects a two-stage deuterium–neon shattered pellet injection in an
O. Vallhagen, I. Pusztai, M. Hoppe, S.L. Newton, T. Fülöp   +4 more
openaire   +2 more sources

Fast plasma dilution in ITER with pure deuterium shattered pellet injection [PDF]

Nuclear Fusion, 2020
Published in Nuclear ...
Nardon E., Hu D., Hoelzl M., Bonfiglio D., JOREK Team   +4 more
openaire   +6 more sources