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Multi-channel retarding field analyzer for EAST

Plasma Science and Technology 2018年第5期20卷 1-5页

作者： M HENKEL D HOSCHEN Y LIANg Y LI S C LIU D NICOLAI N SANDRI g satheeswaran N YAN H X ZHANg the EAST team Forschungszentrum Jülich gmbH Institut für Energie-und Klimaforschung–PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)D-52425 JulichGermany Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China

A multi-channel retarding field analyzer（MC-RFA） including two RFA modules and two Langmuir probes to measure the ion and electron temperature profiles within the scrape-off layer was developed for investigations of the interplay between magnetic topology and plasma transport at the plasma *** MC-RFA probe for the stellarator W7-X and first measurements at the tokamak EAST was *** probe head allows simultaneous multichannel ion temperature as well as for electron temperature *** usability for radial correlation measurements of the measured ion currents is also given.

关键词： retarding field analyzer multi-channel EAST ion temperature diagnostic

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Magnetic configuration effects on the edge heat flux in the limiter plasma on W7-X measured using the infrared camera and the combined probe

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Plasma Science and Technology 2018年第5期20卷 18-22页

作者： P DREWS H NIEMANN J COSFELD Y gAO J gEIgER O gRULKE M HENKEL D HOSCHEN K HOLLFELD C KILLER A KRAMER-FLECKEN Y LIANg S LIU D NICOLAI O NEUBAUER M RACK B SCHWEER g satheeswaran L RUDISCHHAUSER N SANDRI N WANg the W7-X Team Forschungszentrum Jtilich gmbH Institut fur Energie-und Klimaforschung PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)D-52425 JulichGermany Max-Planck-Institut fur Plasmaphysik GreifswaldGermany Forschungszentrum Jtilich gmbH Central Institute for EngineeringElectronics and Analytics/Engineering and Technology(ZEA-1)D-52425 JulichGermany JARA-HPC Germany School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074People's Republic of China

Controlling the heat and particle fluxes in the plasma edge and on the plasma facing components is important for the safe and effective operation of every magnetically confined fusion *** was attempted on Wendelstein 7-X in the first operational campaign,with the modification of the magnetic configuration by use of the trim coils and tuning the field coil currents,commonly named iota ***,the heat loads on the five limiters are ***,they differ between each limiter and are non-uniform,due to the（relatively small） error fields caused by the misalignment of *** is therefore necessary to study the influence of the configuration changes on the transport of heat and particles in the plasma edge caused by the application of error fields and the change of the magnetic *** this paper the upstream measurements conducted with the combined probe are compared to the downstream measurements with the DIAS infrared camera on the limiter.

关键词： Wendelstein 7-X W7-X plasma edge heat flux limiter

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维普期刊数据库

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The ecological response of natural phytoplankton population and related metabolic rates to future ocean acidification

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Journal of Oceanology and Limnology 2022年第3期40卷 999-1011页

作者： Haijiao LIU Yuying ZHAO Chao WU Wenzhe XU Xiaodong ZHANg guicheng ZHANg satheeswaran THANgARAJ Jun SUN Research Centre for Indian Ocean Ecosystem Tianjin University of Science and TechnologyTianjin 300457China College of Marine Science and Technology China University of Geosciences(Wuhan)Wuhan 430074China Department of Marine Science Incheon National UniversityIncheon 22012Republic of Korea

Ocean acidifi cation(OA)and global warming-induced water column stratification can signifi cantly alter phytoplankton-related biological activity in the marine *** how these changes may play out in the tropical Indian Ocean remains *** study investigated the ecological and metabolic responses of the different phytoplankton functional groups to elevated CO_(2) partial pressure and nitrate deficiency in two different environments of the eastern Indian Ocean(EIO).It is revealed that phytoplankton growth and metabolic rates are more sensitive to inorganic nutrients rather than CO_(2).The combined interactive effects of OA and N-limitation on phytoplankton populations are functional *** particular,the abundance and calcification rate of calcifying coccolithophores are expected to be enhanced in the future *** underlying mechanisms for this enhancement may be ascribed to coccolithophore’s lower carbon concentrating mechanisms(CCMs)efficiency and OA-induced[HCO^(-)_(3)]*** comparison,the abundance of non-calcifying microphytoplankton(e.g.,diatoms and dinoflagellates)and primary productivity would be inhibited under those *** erent from previous laboratory experiments,interspecifi c competition for resources would be an important consideration in the natural phytoplankton *** combined factors would roughly determine calcifying coccolithophores as“winners”and non-calcifying microphytoplankton as“losers”in the future ocean *** to the large species-specific differences in phytoplankton sensitivity to OA,comprehensive investigations on oceanic phytoplankton communities are essential to precisely predict phytoplankton ecophysiological response to ocean acidification.

关键词： natural phytoplankton community ocean acidification coccolithophore calcification primary productivity eastern Indian Ocean

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