Experimental research of anode current and anode voltage influence on the speed of decaying plasma resistance change and the time ofthyratron cutoff. Anode current resistance increase is shown to cause thyratron cutof...Experimental research of anode current and anode voltage influence on the speed of decaying plasma resistance change and the time ofthyratron cutoff. Anode current resistance increase is shown to cause thyratron cutoff time increase in case of fixed anode voltage. In turn anode voltage increase in case of fixed anode current causes earlier increase of decaying plasma resistance growth speed and quicker apparatus cutoff：展开更多
Lower hybrid wave （LHW）, electro cyclotron （EC） and neutral beam injection （NBI） etc. are the important methods of auxiliary heating. They would be devoted to the HL-2A tokamak step by step. In order to satisfy ...Lower hybrid wave （LHW）, electro cyclotron （EC） and neutral beam injection （NBI） etc. are the important methods of auxiliary heating. They would be devoted to the HL-2A tokamak step by step. In order to satisfy the debug of each system and the need of the experiment, the system should be equipped with high voltage pulse power （HVPP） according to the requirement.展开更多
Electrostatic energy^-storage capacitors,with their ultrahigh storage density and high temperature stability,have been receiving increasing attention of late for their ability to meet the critical requirements of puls...Electrostatic energy^-storage capacitors,with their ultrahigh storage density and high temperature stability,have been receiving increasing attention of late for their ability to meet the critical requirements of pulsed power devices in low^-consumption systems.In such a context,this work reports on the successful production of anti^-ferroelectric(AFE)thin films with excellent energy storage performance under a relatively low electric field.In particular,La^-doped Pb Zr O3 thin films were fabricated using a sol^-gel method,yielding a recoverable energy storage density of 34.87 J cm^-3 with an efficiency of 59.23%at room temperature under the electric field of^800 k V cm^-1.The temperature dependence of the energy storage property was demonstrated from room temperature to 210°C,indicating a stable density variation between 34.87 and 27.98 J cm^-3.The films also exhibited excellent anti^-fatigue property(endurance of up to 3×10^9cycles and the recoverable energy storage density varied from 39.78 to 29.32 J cm^-3 combined with an efficiency of 61.03%–44.95%under the test frequencies from 10 to 5000 Hz).All results were obtained using compact films with a high polarization(Pmax)of approximately 103.7μC cm^-2 and low remnant polarization(Pr^7μC cm^-2),which was owing to the combination of La Ni O3 buffer layers and vacancies at Pb sites.These results illustrate the great potential of pulsed power devices in low^-consumption systems operating in a wide range of temperatures and long^-term operations.展开更多
文摘Experimental research of anode current and anode voltage influence on the speed of decaying plasma resistance change and the time ofthyratron cutoff. Anode current resistance increase is shown to cause thyratron cutoff time increase in case of fixed anode voltage. In turn anode voltage increase in case of fixed anode current causes earlier increase of decaying plasma resistance growth speed and quicker apparatus cutoff：
文摘Lower hybrid wave （LHW）, electro cyclotron （EC） and neutral beam injection （NBI） etc. are the important methods of auxiliary heating. They would be devoted to the HL-2A tokamak step by step. In order to satisfy the debug of each system and the need of the experiment, the system should be equipped with high voltage pulse power （HVPP） according to the requirement.
基金supported by the National Key R&D Program of China(2018YFE0115500)the National Natural Science Foundation of China(61704159 and 51975541)+3 种基金Shanxi Province Science Foundation for Youths(201701D221125 and 201801D221199)Program for the Young Academic Leaders of the North University of China(QX201807)the Research Project Supported By Shanxi Scholarship Council of China(2019-066)Shanxi“1331 Project”Key Subject Construction(1331 KSC)。
文摘Electrostatic energy^-storage capacitors,with their ultrahigh storage density and high temperature stability,have been receiving increasing attention of late for their ability to meet the critical requirements of pulsed power devices in low^-consumption systems.In such a context,this work reports on the successful production of anti^-ferroelectric(AFE)thin films with excellent energy storage performance under a relatively low electric field.In particular,La^-doped Pb Zr O3 thin films were fabricated using a sol^-gel method,yielding a recoverable energy storage density of 34.87 J cm^-3 with an efficiency of 59.23%at room temperature under the electric field of^800 k V cm^-1.The temperature dependence of the energy storage property was demonstrated from room temperature to 210°C,indicating a stable density variation between 34.87 and 27.98 J cm^-3.The films also exhibited excellent anti^-fatigue property(endurance of up to 3×10^9cycles and the recoverable energy storage density varied from 39.78 to 29.32 J cm^-3 combined with an efficiency of 61.03%–44.95%under the test frequencies from 10 to 5000 Hz).All results were obtained using compact films with a high polarization(Pmax)of approximately 103.7μC cm^-2 and low remnant polarization(Pr^7μC cm^-2),which was owing to the combination of La Ni O3 buffer layers and vacancies at Pb sites.These results illustrate the great potential of pulsed power devices in low^-consumption systems operating in a wide range of temperatures and long^-term operations.
