Bibliografie tematiche / Hl-2a

Letteratura scientifica selezionata sul tema "Hl-2a"

Autore: Grafiati
Pubblicato: 8 giugno 2024

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  2. Tesi
  3. Atti di convegni

Articoli di riviste sul tema "Hl-2a":

1

Duan, X. R., Y. Huang, D. Q. Liu, W. M. Xuan, L. Y. Chen, J. Rao, X. M. Song et al. "Operation of HL-2A Tokamak". IEEE Transactions on Plasma Science 40, n. 3 (marzo 2012): 673–81. http://dx.doi.org/10.1109/tps.2011.2181425.

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2

Duan, X. R., M. Xu, W. L. Zhong, Y. Liu, X. M. Song, D. Q. Liu, Y. Q. Wang et al. "Progress of HL-2A experiments and HL-2M program". Nuclear Fusion 62, n. 4 (21 marzo 2022): 042020. http://dx.doi.org/10.1088/1741-4326/ac3be6.

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Abstract (sommario):
Abstract Since the last IAEA Fusion Energy Conference in 2018, significant progress of the experimental program of HL-2A has been achieved on developing advanced plasma physics, edge localized mode (ELM) control physics and technology. Optimization of plasma confinement has been performed. In particular, high-β N H-mode plasmas exhibiting an internal transport barrier have been obtained (normalized plasma pressure β N reached up to 3). Injection of impurity improved the plasma confinement. ELM control using resonance magnetic perturbation or impurity injection has been achieved in a wide parameter regime, including types I and III. In addition, impurity seeding with supersonic molecular beam injection or laser blow-off techniques has been successfully applied to actively control the plasma confinement and instabilities, as well as plasma disruption with the aid of disruption prediction. Disruption prediction algorithms based on deep learning are developed. A prediction accuracy of 96.8% can be reached by assembling a convolutional neural network. Furthermore, transport resulting from a wide variety of phenomena such as energetic particles and magnetic islands has been investigated. In parallel with the HL-2A experiments, the HL-2M mega-ampere class tokamak was commissioned in 2020 with its first plasma. Key features and capabilities of HL-2M are briefly presented.
3

Zhou, Caipin, Jiancheng Yan, Yong Liu e Dequan Liu. "Progress of the HL-2A Project". Fusion Science and Technology 42, n. 1 (luglio 2002): 102–6. http://dx.doi.org/10.13182/fst02-a216.

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4

Yang, Q. W., Yong Liu, X. T. Ding, J. Q. Dong, L. W. Yan, D. Q. Liu, W. M. Xuan et al. "Overview of HL-2A experiment results". Nuclear Fusion 47, n. 10 (18 settembre 2007): S635—S644. http://dx.doi.org/10.1088/0029-5515/47/10/s12.

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5

Xu, M., X. R. Duan, J. Q. Dong, X. T. Ding, L. W. Yan, Yi Liu, X. M. Song et al. "Overview of recent HL-2A experiments". Nuclear Fusion 55, n. 10 (1 ottobre 2015): 104022. http://dx.doi.org/10.1088/0029-5515/55/10/104022.

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6

Zeng, Cao, Cui Chenghe, Liu Dequan, Cai Xiao e Gao Xiaoyan. "Vacuum System for HL-2A Tokamak". Plasma Science and Technology 7, n. 1 (febbraio 2005): 2632–36. http://dx.doi.org/10.1088/1009-0630/7/1/007.

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7

Liu, Dequan, Caipin Zhou, Zeng Cao, Jiancheng Yan e Yong Liu. "Construction of the HL-2A tokamak". Fusion Engineering and Design 66-68 (settembre 2003): 147–51. http://dx.doi.org/10.1016/s0920-3796(03)00165-0.

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8

Duan, X. R., Yi Liu, M. Xu, L. W. Yan, Y. Xu, X. M. Song, J. Q. Dong et al. "Overview of recent HL-2A experiments". Nuclear Fusion 57, n. 10 (28 giugno 2017): 102013. http://dx.doi.org/10.1088/1741-4326/aa6a72.

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9

Xu, M., X. R. Duan, Yi Liu, X. M. Song, D. Q. Liu, Y. Q. Wang, B. Lu et al. "Overview of HL-2A recent experiments". Nuclear Fusion 59, n. 11 (24 luglio 2019): 112017. http://dx.doi.org/10.1088/1741-4326/ab1d84.

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10

Ding, X. T., Y. Zhou, Z. C. Deng, W. W. Xiao, Z. T. Liu, Z. B. Shi, L. W. Yan, W. Y. Hong e Q. W. Yang. "New diagnostic systems on HL-2A". Review of Scientific Instruments 77, n. 10 (ottobre 2006): 10F528. http://dx.doi.org/10.1063/1.2351889.

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Articoli di riviste

Tesi sul tema "Hl-2a":

1

Song, Shaodong. "Etude du transport de la chaleur et des particules dans les tokamaks Tore Supra et HL-2A". Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10142/document.

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Abstract (sommario):
Le transport de la chaleur et des particules est un des sujets de recherche fondamentaux de la physique des plasmas chauds confinés par des champs magnétiques, systèmes physiques qui sont étudiés dans le cadre des recherches sur la fusion thermonucléaire contrôlée. Ces phénomènes de transport sont essentiellement liés à la turbulence électromagnétique et ils sont donc extrêmement difficiles à modéliser par la théorie. Des expériences spécifiques sont alors réalisées sur des machines expérimentales, telles que les tokamaks ou les stellarators, afin d'améliorer la connaissance de ces phénomènes. Cette thèse décrit des études expérimentales de ce type réalisées sur deux tokamaks de grande dimension: Tore Supra (machine basée au CEA/Cadarache) et HL-2A (basée au South-Western Institute of Physics, Chengdu, Chine). La technique utilisée consiste à injecter, de façon modulée dans le temps, des ondes de forte puissance afin de perturber la température électronique du plasma, et des faisceaux supersoniques de particules pour en perturber la densité. La température est mesurée par l'Emission Cyclotronique Electronique et la densité par Réflectométrie micro-onde. Ces expériences on mis en évidence une convection de la chaleur vers l'intérieur du plasma (un phénomène dont l'existence est toujours controversée), et des effets dus aux termes non-diagonaux de la matrice de transport. Ces résultats ont été comparés aux modèles de transport existants
Heat and particle transport is one of the fundamental subjects of research in the physics of hot plasmas confined by magnetic fields, a class of physical systems that are studied in the framework of research on controlled thermonuclear fusion. These transport phenomena are mainly related to electromagnetic turbulence and are therefore extremely difficult to model at a first-principle level. Specific experiments in this area, on plasma devices such as tokamaks or stellarators, are widely used to improve understanding of these phenomena. This thesis reports on experimental studies performed on two large tokamaks : Tore Supra (based at CEA/Cadarache, France) and HL-2A (based at the South-Western Institute of Physics, Chengdu, China). The technique used consists in modulated injection of wave power to perturb the electron temperature and/or of Supersonic Molecular Beams to perturb the plasma density. Temperature is then measured by Electron Cyclotron Emission and density by Reflectometry, and Fourier analysis is used to determine the transport properties. Evidence has been found of inward heat convection (a phenomenon whose existence is still controversial) as well as of peculiar effects due to the non-diagonal terms of the transport matrix. Comparison with transport models has been carried out
2

Liang, Anshu. "Understanding the low to high confinement transition in tokamak plasmas". Electronic Thesis or Diss., Aix-Marseille, 2023. http://theses.univ-amu.fr.lama.univ-amu.fr/230112_LIANG_826zuy182lisgpn946fzpk544n_TH.pdf.

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Les travaux présentés dans cette thèse sont consacrés à la compréhension du mécanisme physique de la transition L-H. Le mécanisme d'entraînement du cisaillement de vitesse dans le bord du plasma a été étudié à l'aide d'une injection de puissance d'entraînement à courant hybride inférieur (LHCD) sur le tokamak HL-2A en Chine. Il a été montré que l'augmentation du cisaillement de vitesse est principalement entraînée par le terme diamagnétique ionique du champ électrique radial Er. Au cours de la transition L-H, on observe que le terme diamagnétique ionique du champ électrique radial Er joue un rôle dominant dans l'augmentation du cisaillement de vitesse, tandis que les contributions des termes de vitesse poloïdal et toroïdal sont négligeables. Le cisaillement de vitesse doit atteindre une valeur critique pour permettre à la transition L-H de se produire. Cela signifie que la valeur critique joue un rôle de seuil de cisaillement de vitesse pour la transition L-H. De plus, l'effet stimulé de l'injection de faisceaux moléculaires supersoniques (SMBI) sur la transition L-H a également été étudié sur HL-2A. Les résultats suggèrent que le SMBI pourrait être une méthode fiable pour réduire le seuil de puissance de transition L-H et contrôler la transition L-H dans les futurs réacteurs de fusion. Enfin, des efforts ont été faits sur l'optimisation du couplage LHCD sur le tokamak WEST en France et une analyse du couplage de l'onde LH dans les plasmas WEST a été réalisée. L'analyse montre que le remodelage toroïdal du lanceur multijonction entièrement actif effectué avant son installation à WEST a été un succès
The works presented in this thesis are devoted to understand the physical mechanism of the L-H transition. The driving mechanism of the velocity shear in the plasma edge has been studied using lower hybrid current drive (LHCD) power injection on the HL-2A tokamak in China. It has been shown that the increase of the velocity shear is mainly driven by the ion diamagnetic term of the radial electric field Er. During the L-H transition, it is observed that the ion diamagnetic term of the radial electric field Er plays a dominant role in the increase of velocity shear, while the contributions of the poloidal and toroidal velocity terms are negligible. The velocity shear must reach a critical value to allow the L-H transition to occur. This means that the critical value plays a role as a velocity shear threshold for the L-H transition. In addition, the stimulated effect of supersonic molecular beam injection (SMBI) on the L-H transition has also been investigated on HL-2A. The results suggest that SMBI could be a reliable method for reducing the L-H transition power threshold and controlling the L-H transition in future fusion reactors. Finally, efforts have been made on the optimization of LHCD coupling on the WEST tokamak in France and an analysis of the LH wave coupling in WEST plasmas has been carried out. The analysis shows that the toroidal reshaping of the fully-active-multijunction launcher carried out before its installation in WEST was successful. The experiments have also shown that the reshaping of the passive-active-multijunction launcher is necessary in order to avoid overheating on the launcher front in long pulses

Atti di convegni sul tema "Hl-2a":

1

Duan, X. R., Y. Huang, D. Q. Liu, W. M. Xuan, L. Y. Chen, J. Rao, X. M. Song et al. "Operation of HL-2A tokamak". In 2011 IEEE 24th Symposium on Fusion Engineering (SOFE). IEEE, 2011. http://dx.doi.org/10.1109/sofe.2011.6052199.

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2

Li, W., Q. W. Yang, X. T. Ding, L. W. Yan, Z. B. Shi, Y. B. Dong, L. H. Yao et al. "Recent Experimental Results in the HL-2A Tokamak". In PLASMA AND FUSION SCIENCE: 16th IAEA Technical Meeting on Research using Small Fusion Devices; XI Latin American Workshop on Plasma Physics. AIP, 2006. http://dx.doi.org/10.1063/1.2405919.

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3

ZHOU, JUN, JUN RAO, BO LI, MEI HUANG, ZHIHONG LU, ZIHUA KANG, HE WANG KUN FENG et al. "STATUS OF THE ECRH SYSTEM ON HL-2A". In Proceedings of the 16th Joint Workshop. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814340274_0005.

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4

Lu, B., X. Y. Bai, Y. Peysson, Y. P. Zhang, D. Mazon, G. L. Xiao, X. L. Zou et al. "Recent LHCD experiments on HL-2A and LHCD system development on HL-2M". In THE 6TH INTERNATIONAL CONFERENCE ON BIOLOGICAL SCIENCE ICBS 2019: “Biodiversity as a Cornerstone for Embracing Future Humanity”. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0013734.

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5

Ding, X. T., Z. T. Liu, Z. B. Shi, W. W. Xiao, Y. L. Li e Q. W. Yang. "Development of the Millimeter Wave Diagnostics on HL-2A". In >2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics. IEEE, 2006. http://dx.doi.org/10.1109/icimw.2006.368710.

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6

Song, X., X. M. Song, F. Xia, R. Mao e C. Wang. "The investigation programme of plasma discharge on HL-2A Tokamak". In 2013 IEEE 25th Symposium on Fusion Engineering (SOFE). IEEE, 2013. http://dx.doi.org/10.1109/sofe.2013.6635285.

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7

Lieming, Yao, Wu Jing, Zhu Jianhua, Han Xiaoyu, Yu Deliang e Zhou Chongxi. "The charge exchange recombination spectroscopy diagnostic on HL-2A Tokamak". In 2013 IEEE 25th Symposium on Fusion Engineering (SOFE). IEEE, 2013. http://dx.doi.org/10.1109/sofe.2013.6635346.

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8

Dong, Y. B., Yi Liu, H. J. Sun, Jun Zhou, W. W. Xiao, W. Chen, W. Deng et al. "Recent Experiment Results during Electron Cyclotron Heating on HL-2A". In PLASMA AND FUSION SCIENCE: 17th IAEA Technical Meeting on Research Using Small Fusion Devices. AIP, 2008. http://dx.doi.org/10.1063/1.2917030.

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9

Fan Xia, Li Zhao e Liaoyuan Chen. "New developments for real time plasma control system on HL-2A". In 2011 IEEE 24th Symposium on Fusion Engineering (SOFE). IEEE, 2011. http://dx.doi.org/10.1109/sofe.2011.6052254.

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10

Mao, X. H., L. Y. Yao, Y. Q. Wang, Y. L. Wang, Q. Li, P. G. Liu, M. Zhang e W. M. Xuan. "A pulse step modulator cathode power supply for ECRH system on HL-2A Tokamak". In 2013 IEEE 25th Symposium on Fusion Engineering (SOFE). IEEE, 2013. http://dx.doi.org/10.1109/sofe.2013.6635316.

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