Jian Wang;Chengzhi Hou;Keda Chen;Yuan Xu;Shumin Zhang;Jikui Liu;Liang Zou;Qingmin Li
{"title":"Research on Deep Dielectric Charging Characteristics and Insulation Optimization of Aerospace Electric Brush Plates","authors":"Jian Wang;Chengzhi Hou;Keda Chen;Yuan Xu;Shumin Zhang;Jikui Liu;Liang Zou;Qingmin Li","doi":"10.1109/TPS.2024.3510366","DOIUrl":"https://doi.org/10.1109/TPS.2024.3510366","url":null,"abstract":"In the extreme electronic radiation environment of space, high-energy electrons can cause deep dielectric charging of the insulation components of the electric brush plate, causing discharge of the insulation medium and adjacent electric brushes, thereby inducing insulation failure of the solar array drive assembly (SADA), and even leading to the failure of the entire satellite. The material of the insulating medium, the state of the electric brushes, and the distance between the electric brushes can directly affect the discharge threshold of the electric brush plate. Therefore, it is necessary to conduct in-depth research on these factors in order to reduce the possibility of discharge accidents. To this end, a 3-D deep charging model of the insulation component of the electric brush plate was established, and the 3-D distribution of the electric field and potential of the insulation component of the electric brush plate was obtained. The time characteristics of deep dielectric charging of the electric brush plate were studied. After stopping electron irradiation, the electric brush plates remained at a potential of over 5 kV for a long time, posing a risk of discharge. The study investigated the effect of material composition on deep dielectric charging of electric brush plates, and the results showed that the electric brush plate with the highest conductivity, consisting of 60% YS<inline-formula> <tex-math>$20+30$ </tex-math></inline-formula>% ZnO +5% GF +5% POSS material, has the strongest electric charge bleed ability. Further based on the distribution of deep dielectric charging potential on the electric brush plate, the ME-268A flat charge meter was used to verify that the 60% YS<inline-formula> <tex-math>$20+30$ </tex-math></inline-formula>% ZnO +5% GF +5% POSS material composition electric brush plate has good charge transport characteristics and insulation performance, and the influence of electric brush state and electric brush distance on charging voltage was studied. The results indicate that insulation measures, such as increasing the installation distance of adjacent electric brushes, chamfering the electric brush ends, and coating the electric brushes with insulation coatings, can improve the electrostatic protection ability between adjacent electric brushes.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5392-5401"},"PeriodicalIF":1.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993818","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}
Runqi Yan;Yonggui Zhai;Jianwei Zhang;Hongguang Wang;Yongdong Li;Meng Cao
{"title":"Calculation and Analysis of Inelastic Scattering Properties of Crystal Materials","authors":"Runqi Yan;Yonggui Zhai;Jianwei Zhang;Hongguang Wang;Yongdong Li;Meng Cao","doi":"10.1109/TPS.2024.3505902","DOIUrl":"https://doi.org/10.1109/TPS.2024.3505902","url":null,"abstract":"This work presents an attempt to calculate inelastic scattering properties: differential cross section (dCS), energy loss probability function (ELPF), and inelastic mean free path (IMFP), based on the energy- and momentum-dependent energy loss functions (ELFs) derived from the first-principles calculations for six materials: aluminum (Al), silicon (Si), copper (Cu), silver (Ag), gold (Au), and titanium nitride (TiN). The dCS and ELPF results illuminate detailed differences in energy loss across various materials and energy levels, showcasing the intricate nature of inelastic scattering. The IMFP results follow the same trend as the experimental and computational reference data in the high-energy band, with close values. The three inelastic scattering properties are affected by the ELF features, including the location of the peaks (ridges), the gradient in the direction of momentum, and the shift of the ridges. On this basis, this work also attempts to analyze the correlation between the calculated inelastic scattering properties and the secondary electron yield (SEY) and seeks to qualitatively analyze the differences in the secondary electron (SE) emission properties of various materials.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5493-5504"},"PeriodicalIF":1.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993754","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":"Performance Enhancement of EAD Thrusters With Nonuniform Emitters Array","authors":"Davide Usuelli;Raffaello Terenzi;Stefano Trovato;Marco Belan","doi":"10.1109/TPS.2024.3505980","DOIUrl":"https://doi.org/10.1109/TPS.2024.3505980","url":null,"abstract":"This work presents an experimental campaign to optimize the performance of electro-aerodynamic (EAD) thrusters through nonuniform emitter arrangements. The study examines the impact of emitter configurations on thrust and thrust-to-power coefficients <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {T}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {TP}}$ </tex-math></inline-formula>. Different emitter arrangements, including collinear and staggered arrays, are tested using thrust, electrical, and velocity measurements as diagnostics. The tests are parametrically performed for different sizes (chords) of the collector electrodes. Results reveal that nonuniform emitter configurations outperform standard arrays, in particular, with short chord collectors, widely spaced apart. An optimal configuration for <inline-formula> <tex-math>$boldsymbol {C}_{boldsymbol {T}}$ </tex-math></inline-formula> is identified among the staggered ones. In addition, droplet collectors demonstrate competitive performance compared to airfoil collectors.","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 11","pages":"5414-5421"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10785549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993820","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.2024.3506423","DOIUrl":"https://doi.org/10.1109/TPS.2024.3506423","url":null,"abstract":"","PeriodicalId":450,"journal":{"name":"IEEE Transactions on Plasma Science","volume":"52 9","pages":"4531-4531"},"PeriodicalIF":1.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10786902","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797894","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}
Li YuXin;Ma Ping;Xiong Zhengwei;Gao ZhiPeng;Tian DeYang
{"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}
Jacob Stephens;Tom Huiskamp;Weihua Jiang;Chunqi Jiang;Ravi Joshi
{"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}