2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)最新文献

SF6 Gas Replacement in Pulsed High Voltage Coaxial Cables SF6脉冲高压同轴电缆中的气体替换

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-11-26 DOI: 10.1109/ICDL.2019.8796780

T. Stadlbauer, T. Kramer, D. Kontelis, L. Ducimetière, L. Sermeus, D. Woog

{"title":"SF6 Gas Replacement in Pulsed High Voltage Coaxial Cables","authors":"T. Stadlbauer, T. Kramer, D. Kontelis, L. Ducimetière, L. Sermeus, D. Woog","doi":"10.1109/ICDL.2019.8796780","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796780","url":null,"abstract":"Several fast pulsed high voltage kicker systems at CERN use coaxial cables with SF6 gas as dielectric. Leak detection systems are installed and for interventions, the gas is recuperated and re-circulated, reducing emissions to a minimum. Nevertheless due to the high global warming potential of SF6 gas and the efforts of the European Union and CERN to reduce fluorinated greenhouse gas emissions to a minimum, a replacement strategy for the SF6 gas filled coaxial high voltage cables is being developed. New pulse generator technologies as well as different SF6 gas substitutes and also new conventional PE insulated cables are being studied. This paper gives an overview of the studies carried out to replace these cables. A comparison of possible alternatives with liquid, solid and gas dielectrics is given. The properties of the cables with alternative dielectrics are outlined, by either measurement, simulation or calculation.Especially the important parameters for kicker systems are evaluated and compared: breakdown voltage, low attenuation and low impedance change. Possible dimensions and tolerances are given, the expected costs and environmental impact are outlined. In addition an overview of different dielectric liquids used in the complete pulse generator as well as the operational experience, performance and limitations is given.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116700612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electrothermal Coupling Simulation of Termination Insulation of Superconducting Energy Pipeline 超导能量管道端部绝缘的电热耦合仿真

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796842

B. Song, Xuze Gao, M. Ren, M. Dong, Tianxin Zhuang

{"title":"Electrothermal Coupling Simulation of Termination Insulation of Superconducting Energy Pipeline","authors":"B. Song, Xuze Gao, M. Ren, M. Dong, Tianxin Zhuang","doi":"10.1109/ICDL.2019.8796842","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796842","url":null,"abstract":"Superconducting DC energy pipeline realizes the mixed transportation of electric energy and liquid natural gas, which is a high efficiency and low energy consumption method of redistribution of energy. Superconducting DC electric termination is one of the cores equipment of superconducting DC energy pipelines which bears various extreme conditions such as electric field, large temperature gradient, mechanical stress, etc. Under the influences of multiphysics, the electrical and thermal properties of the terminal materials will change to varying degrees, and these changes will cause distortion of the physical field in turn. Therefore, in the design of the terminal structure, multiple physical interactions and mutual cooperation methods need to be considered. Under the two-way coupling of multi-physics and terminal material parameters, the physical simulation model of superconducting energy pipeline is established, and the electric field distortion in this model are analyzed.In this article, the physical model of superconducting energy pipeline terminal is established by COMSOL. And we find that the change rule of the material conductivity with temperature counts a great deal in the distribution of the electric field thermal field in the terminal. At the same time, the cooling power of liquid nitrogen influences the temperature distribution, thus affect the electric field indirectly to a certain extent. Therefore, in the optimization design of the terminal, selection of insulation materials, how to control the heat generation should take into consideration. This study provides theoretical support for the insulation optimization design of superconducting energy pipeline terminals.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131241981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Study of the Thermal Excitation Applied to a Dielectric Liquid Film 介质液体膜热激励的数值研究

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796727

P. Leblanc, P. Clermont, T. Paillat, X. Sidambarompoulé, J. Laurentie, P. Notingher

引用次数: 2

XEMIS2: A liquid xenon Compton camera to image small animals XEMIS2:一种液体氙康普顿相机，用于拍摄小动物

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796534

Yuwei Zhu, S. Acounis, N. Beaupère, J. Beney, J. Bert, S. Bouvier, C. Canot, T. Carlier, M. Chérel, J. Cussonneau, S. Diglio, D. Giovagnoli, J. Idier, F. Kraeber-Bodéré, P. L. Ray, F. Lefèvre, J. Masbou, E. Morteau, J. Stutzmann, D. Thers, D. Visvikis, Y. Xing

{"title":"XEMIS2: A liquid xenon Compton camera to image small animals","authors":"Yuwei Zhu, S. Acounis, N. Beaupère, J. Beney, J. Bert, S. Bouvier, C. Canot, T. Carlier, M. Chérel, J. Cussonneau, S. Diglio, D. Giovagnoli, J. Idier, F. Kraeber-Bodéré, P. L. Ray, F. Lefèvre, J. Masbou, E. Morteau, J. Stutzmann, D. Thers, D. Visvikis, Y. Xing","doi":"10.1109/ICDL.2019.8796534","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796534","url":null,"abstract":"An innovative Xenon Medical Imaging System, XEMIS2, designed for small animal 3 $gamma$ preclinical imaging, has been constructed, and it is currently under test and qualification at the SUBATECH laboratory. It consists of a Compton camera, containing nearly 200 kg of liquid xenon, whose main goals are the precise three-dimensional localization of the 44Sc radioactive emitter used to image the small animal and the reduction of the administered radiopharmaceutical activity in cancer diagnosis. The active volume of the XEMIS2 camera is surrounded by a set of PhotoMultiplier Tubes (PMTs) to measure scintillation light. The read-out anodes are segmented in 20000 pixels to measure ionization charges. In order to reduce the electronics dead-time during continuous data taking, a novel DAQ system specifically designed for XEMIS2 has been realized and recently tested. It consists of two independent synchronized scintillation and ionization signal detection chains. The self-triggered scintillation light detection chain has been recently tested and calibrated in XEMIS1, whose experimental results showed a good performance. XEMIS2 will be soon installed at the Center for Applied Multimodal Imaging (CIMA) in the Nantes University Hospital for further preclinical studies. To safely manage a large amount of xenon in a hospital center, a recovery and storage cryogenic subsystem called ReStoX has been conceived, successfully commissioned, and already installed at CIMA.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124808146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electron transport coefficients and negative streamer dynamics in CF3I-SF6 mixtures CF3I-SF6混合物中的电子输运系数和负流光动力学

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796598

S. Dujko, J. Atić, D. Bošnjaković, Z. Petrović, J. Urquijo

引用次数: 1

Prebreakdown and Breakdown in Liquid Nitrogen under Pulsed Heating for Superconducting 脉冲超导加热下液氮的预击穿和击穿

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796643

R. Chassagnoux, O. Lesaint, N. Bonifaci, O. Gallot-Lavallée, P. Legendre, C. Creusot, A. Girodet

引用次数: 2

Influence of Conductive Nanoparticles on the Breakdown Voltage of Mineral Oil, Synthetic and Natural Ester Oil-based Nanofluids 导电纳米颗粒对矿物油、合成和天然酯油基纳米流体击穿电压的影响

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796530

U. Khaled, A. Beroual

引用次数: 3

The conformity of DGA interpretation techniques: Experience from transformer 132 units DGA解释技术的整合:132台变压器的经验

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796588

N. Pattanadech, Kantitat Sasomponsawatline, Jompatara Siriworachanyadee, Worawich Angsusatra

引用次数: 5

Mobility of Charge Carriers in Dielectric Liquids 介电液体中载流子的迁移率

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796776

Qingjiang Xue, I. Timoshkin, M. Given, Mark P. Wilson, S. Macgregor

引用次数: 1

Electron Self-Trapping in Vortex Rings in Superfluid Helium 超流氦涡旋环中的电子自俘获

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-23 DOI: 10.1109/ICDL.2019.8796648

A. Khrapak, S. Bronin

{"title":"Electron Self-Trapping in Vortex Rings in Superfluid Helium","authors":"A. Khrapak, S. Bronin","doi":"10.1109/ICDL.2019.8796648","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796648","url":null,"abstract":"The mobility of electrons injected in the majority of nonpolar dielectric liquids is a few orders of magnitude higher than the mobility of positive ions. However, the behavior of electrons in liquid helium is anomalous. The electron mobility is a few orders of magnitude lower than the value expected according to the classical Langevin theory and even a few times lower than the mobility of positive ions. The reason is that it is energetically favorable for an electron to be localized in nanobubble owing to a strong exchange repulsion from helium atoms. In addition to ordinary electron bubbles, two more types of negative charge carriers were discovered many years ago in superfluid helium: “fast” and “exotic” ions. The mobility of fast ions is approximately seven times higher than the mobility of electron bubbles, whereas the mobility of a family of exotic ions (more than ten members) lies between these two values. In the present work a model according to which fast and exotic negative ions in superfluid helium represent the localized states of electrons in vortex rings is presented. The quantization of radial and longitudinal motions of electrons inside the vortex core and the quantization of the vortex motion of liquid helium around the charged complex lead to the existence of a whole family of excited states of electron vortices with different radii and quanta of vorticity. The proposed simple model of autolocalization of injected electrons in vortex rings allows to understand the nature of fast and exotic ions in superfluid helium.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"274 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114025596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0