IEEE Transactions on Plasma Science最新文献

{"title":"Guest Editorial IEEE TPS—SOFE 2023 Special Issue","authors":"Rhian Chapman","doi":"10.1109/TPS.2024.3456849","DOIUrl":"https://doi.org/10.1109/TPS.2024.3456849","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"3386-3386"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786904","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of Plasma Sheath Distribution and Electromagnetic Transport in Hypersonic Vehicles Under Multieffects Coupling","authors":"Li YuXin;Ma Ping;Xiong Zhengwei;Gao ZhiPeng;Tian DeYang","doi":"10.1109/TPS.2024.3503716","DOIUrl":"https://doi.org/10.1109/TPS.2024.3503716","url":null,"abstract":"When a hypersonic vehicle flies at high speed in near space, the distribution of key characteristic parameters of the plasma sheath covering the vehicle shows significant changes due to the influence of high-temperature gas effect and wing turbulence interference, resulting in more complicated electromagnetic (EM) transmission characteristics of the target. To more accurately study the distribution characteristics of the plasma sheath and its EM transmission properties of hypersonic vehicles under the coupling of a chemical reaction and near-wall turbulence. The computational fluid dynamics (CFD) method was used to solve the multicomponent 3-D Navier-Stokes equations with chemical reaction source terms, and the Spalart-Allmaras (S-A) turbulence model was introduced to simulate near-wall flow, numerical simulations were performed for different altitudes and velocities. The focus was on researching the distribution characteristics and evolution laws of electron density, particle mass fractions, and EM transmission in the flow field. The results show that considering the near-wall disturbance makes the peak electron density far away from the wall; the air undergoes a violent dissociation-complexity reaction after the excitation wave, the free electrons mainly originate from the contributions of oxygen and nitrogen, and the difference mainly depends on the degree of decomposition of the nitrogen. Finally, the high electron density decreases the transmission coefficient of the EM wave, increases the reflection coefficient, and increases the degree of the EM wave attenuation, and the turbulent near-wall disturbance makes the thickness of the sheath increase, which further aggravates the EM wave attenuation. This study can deepen the understanding of the EM environment of the hypersonic vehicle, and can also provide a reference for the design of the hypersonic vehicle.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5327-5334"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guest Editorial Special Issue on Pulsed Power Science and Technology","authors":"Jacob Stephens;Tom Huiskamp;Weihua Jiang;Chunqi Jiang;Ravi Joshi","doi":"10.1109/TPS.2024.3495352","DOIUrl":"https://doi.org/10.1109/TPS.2024.3495352","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4234-4234"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786887","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blank Page","authors":"","doi":"10.1109/TPS.2024.3504897","DOIUrl":"https://doi.org/10.1109/TPS.2024.3504897","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"C4-C4"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786898","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron Beam Welding of the HTS Current Lead for the ITER Feeder","authors":"Jianguo Ma;Jia Tao;Zhenfei Liu;Chen Liu;Liming Peng;Wei Wen;Le Yang;Xiaowei Xia;Jiefeng Wu;Rui Wang;Zhihong Liu","doi":"10.1109/TPS.2024.3495636","DOIUrl":"https://doi.org/10.1109/TPS.2024.3495636","url":null,"abstract":"The high-temperature superconducting (HTS) current lead is one of the core components of the International Thermonuclear Experimental Reactor (ITER) magnet feeder system. Due to high-quality requirements, electron beam welding (EBW) was chosen to weld the room temperature terminal, the finned heat exchanger, and the HTS segment. The short mock-up was created to assess the performance of the welded joints. The analysis of macroscopic morphology and microstructure indicates that the welded joint of the short mock-up appeared to be free of visible defects. The tensile strength of the welded samples ranges from 185 to 208 MPa, which is higher than the design requirement of 150 MPa. The side bending test also shows no open discontinuity of the samples. Additionally, the thermal shock test was carried out. The dye penetrant test and the ultrasonic test after thermal shock shows that there are no obvious defects inside or on the surface of the weld seam. Furthermore, the leakage rate of the welded sample measured in the helium tightness leak test was <inline-formula> <tex-math>$2.2times 10^{-10}$ </tex-math></inline-formula>Pa<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>m3/s, indicating no cracks detected in the joints in the joints. The same parameters were also used for the welding of the long mock-up equipped with fins. The maximum temperature during the welding process does not go over the prescribed limit. The actual HTS current lead was welded, and its performance was evaluated, based on the welding experiments of mock-ups. The welding quality of the HTS current lead was confirmed by all test results.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5451-5456"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guest Editorial: Special Issue on Electrical Discharges in Vacuum","authors":"Yasunori Tanaka;Eiji Kaneko;Akiko Kumada;Hiroki Kojima;Yuki Inada;Yasushi Yamano","doi":"10.1109/TPS.2024.3487346","DOIUrl":"https://doi.org/10.1109/TPS.2024.3487346","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4362-4364"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786897","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shock Waves of the Electric Field—Part 2: Experimental Studies of Vysikayl’s Jumps and Plasma Nozzles in Plasma With Current","authors":"Philipp I. Vysikaylo","doi":"10.1109/TPS.2024.3505256","DOIUrl":"https://doi.org/10.1109/TPS.2024.3505256","url":null,"abstract":"In our works, we prove that the cumulation (self-focusing) of charged particles in a plasma (with current) is a universal property of cumulative-dissipative structures (CDSs) with characteristic sizes from <inline-formula> <tex-math>$10^{-15}$ </tex-math></inline-formula> to <inline-formula> <tex-math>$10^{27}$ </tex-math></inline-formula> m. The basis of such cumulation is the self-formation of electric field shock waves. Earlier (in Part 1) we proved that the electric field (in a gas-discharge plasma with current) behaves as an additional (to the concentrations of charged particles) component of the plasma. Therefore, both drift profiles and diffusion jumps (sharper discontinuities) should be observed in the plasma, analogs of ordinary Mach shock waves or magnetic field shock waves described by Sagdeev. In electric field shock waves, the pressure is created by the electric field (E) pressure—<inline-formula> <tex-math>$P_{text {E}}sim E^{2}$ </tex-math></inline-formula>/<inline-formula> <tex-math>$8pi $ </tex-math></inline-formula>. Electric field shock waves were first predicted by the author in 1985. The author claims that these standing shock waves focus structures (in a plasma with current) by ambipolar drifts caused by the nonlinearity of the processes of transport of charged particles of the plasma. In this article, we will dwell in detail on the experimental studies of 3-D self-forming plasma cumulative-dissipative Vysikaylo’s structures in gas-discharge plasma. By comparison with experiments, we prove that it is necessary to take into account the violation of electrical neutrality (Poisson’s equation for the electric field) in gas-discharge plasma with current. In this part 2, we will use photographs and double probes to study the self-formation of inhomogeneous 3-D structures (plasmoids) due to the interference of ambipolar drift and gas pumping in inhomogeneous plasma using a local ionizer. For this purpose, we preliminarily locally disturbed the homogeneous plasma in the gas-discharge tube with a beam of fast electrons. This leads to self-formation of local: 1) shock waves of the electric field (a monolayer of positive space charge with jumps of the electric field), stopped by pumping gas (on one side of the fast electron beam); 2) transient 3-D profiles; and 3) Vysikaylo’s plasma nozzles in quasi-neutral homogeneous plasma (on the other side of the beam disturbing the plasma). Based on laboratory experiments and theoretical studies of gas-discharge plasma, we prove that the ambipolar drift caused by different dependences of the electron and positive ion mobility in a simple plasma (with one type of ions) determines the dynamic processes of cumulation (self-focusing) and the formation of 3-D shock waves of the electric field due to the violation of electrical neutrality in electropositive gases.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5306-5314"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Online Excitation Current Pre-Charge Time Adjustment of Output Current Waveform for Pulsed Alternator Based on Backpropagation Neural Network","authors":"Yingjie Chen;Wenchao Li;Youlong Wang;Chen Chen;Qi Li","doi":"10.1109/TPS.2024.3506925","DOIUrl":"https://doi.org/10.1109/TPS.2024.3506925","url":null,"abstract":"In this article, a method based on backpropagation (BP) neural network is proposed to adjust the output current waveform by adjusting the excitation current pre-charge time online. The discharge controller adjusts the output current waveform of the pulsed alternator by automatically modifying the excitation current pre-charge time according to the different current waveform requirements of the load. First, the characteristics of the pulsed alternator in the pulse separate excitation mode are analyzed, and the intrinsic characteristics of the excitation circuit are highlighted. Subsequently, based on the strong nonlinear relationship between different excitation current pre-charge time and their corresponding output pulse waveforms, a BP neural network model is constructed, mapping the output pulse waveform indices to the excitation current pre-charge time. Second, a 3-D field-circuit coupling finite element model of the pulsed alternator is established, and suitable samples for neural network training are collected using this model, facilitating the training of the neural network. Finally, the correctness and effectiveness of the proposed method are verified through experimental research conducted on a prototype platform of the pulsed alternator.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5376-5384"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blank Page","authors":"","doi":"10.1109/TPS.2024.3506373","DOIUrl":"https://doi.org/10.1109/TPS.2024.3506373","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"C4-C4"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786896","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Member ad suite","authors":"","doi":"10.1109/TPS.2024.3511216","DOIUrl":"https://doi.org/10.1109/TPS.2024.3511216","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4231-4231"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786873","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}