Plasma Science and Technology最新文献_第3页

Enhanced degradation of tetracycline by gas-liquid discharge plasma coupled with g-C3N4/TiO2 气液放电等离子体与 g-C3N4/TiO2 相结合增强四环素的降解能力

Plasma Science and Technology Pub Date : 2024-07-02 DOI: 10.1088/2058-6272/ad5df2

Zhenhai Wang, Zikai Zhou, Sen Wang, Zhi Fang

{"title":"Enhanced degradation of tetracycline by gas-liquid discharge plasma coupled with g-C3N4/TiO2","authors":"Zhenhai Wang, Zikai Zhou, Sen Wang, Zhi Fang","doi":"10.1088/2058-6272/ad5df2","DOIUrl":"https://doi.org/10.1088/2058-6272/ad5df2","url":null,"abstract":"\u0000 Plasma-catalysis is considered as one of the most promising technologies for antibiotic degradation in water. In the plasma-catalytic system, one of the factors affecting the degradation effect is the performance of the photocatalyst, which is usually restricted by the rapid recombination of electrons and holes as well as narrow light absorption range. In this research, a photocatalyst g-C3N4/TiO2 was prepared and coupled with gas-liquid discharge (GLD) to degrade tetracycline (TC). The performance was examined, and the degradation pathways and mechanisms were studied. Results show that a 90% degradation rate is achieved in the GLD with g-C3N4/TiO2 over a 10 min treatment. Increasing the pulse voltage is conducive to increasing the degradation rate, whereas the addition of excessive g-C3N4/TiO2 tends to precipitate agglomerates, resulting in a poor degradation efficiency. The redox properties of the g-C3N4/TiO2 surface promote the generation of oxidizing active species (H2O2, O3) in solution. Radical quenching experiments showed that ·OH, hole (h+), play important roles in the TC degradation by the discharge with g-C3N4/TiO2. Two potential degradation pathways were proposed based on the intermediates. The toxicity of tetracycline was reduced by treatment in the system. Furthermore, the g-C3N4/TiO2 composites exhibited excellent recoverability and stability. Keywords: Gas-liquid discharge; Plasma-catalysis; g-C3N4/TiO2; TC degradation","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"357 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141686184","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

Summary of the 11th Conference on Magnetic Confined Fusion Theory and Simulation (CMCFTS 2023) 第十一届磁约束聚变理论与模拟会议（CMCFTS 2023）摘要

Plasma Science and Technology Pub Date : 2024-07-01 DOI: 10.1088/2058-6272/ad5d8a

Guangzhou Hao, Jianqiang Xu, Youwen Sun, Zhibin Guo

引用次数: 0

Corrigendum to “Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators” 基于网格型和超密集阵列等离子体致动器的机翼摩擦阻力减小技术 "的更正

Plasma Science and Technology Pub Date : 2024-07-01 DOI: 10.1088/2058-6272/ad5d4e

Ziqi 子淇 FANG 方, H. ZONG 宗, Y. Wu 吴, H. Liang 梁, Z. SU 苏

引用次数: 0

Simulation of charge-exchange induced NBI losses on EAST 模拟电荷交换在 EAST 上引起的 NBI 损失

Plasma Science and Technology Pub Date : 2024-06-11 DOI: 10.1088/2058-6272/ad56ca

Zhanhong Lin, Feng Wang, Ming-Xia Xu, Chaofeng Sang, Chen Zhang, Zhengxiong Wang

{"title":"Simulation of charge-exchange induced NBI losses on EAST","authors":"Zhanhong Lin, Feng Wang, Ming-Xia Xu, Chaofeng Sang, Chen Zhang, Zhengxiong Wang","doi":"10.1088/2058-6272/ad56ca","DOIUrl":"https://doi.org/10.1088/2058-6272/ad56ca","url":null,"abstract":"\u0000 The neutral beam injection is widely adopted in tokamaks as a key heating tool, playing a crucial role in generating burning plasmas. However, the loss of beam ions can damage the first wall and reduce the heating efficiency, resulting in failure to maintain steady-state conditions. In this work, the effect of neutral particles in the edge on fast ions generated by NBI in the Experimental Advanced Superconducting Tokamak (EAST) device is studied using the particle tracer code (PTC). The poloidal distribution of neutral particles is calculated by edge plasma simulation code SOLPS-ITER. In this simulation, four beam lines in EAST are considered: co-current tangential (co-tang), co-current perpendicular (co-perp), counter-current tangential (ctr-tang) and counter-current perpendicular (ctr-perp). It is shown that, in the absence of neutral particles, the loss fraction of ctr-injection is considerably higher than that of the co-injection. When considering the neutral particles, it is found that the ctr-perp injection demonstrates a significant variation in particles loss fraction (ranging from 18.56% to 25.42%) compared to the other three injection configurations. In terms of the loss fraction induced by neutral particles, ctr-injection exceeds co-injection, and perpendicular configuration exceeds tangential configuration. Furthermore, the divergence of charge exchange ratios of three different energy (full energy, half energy, one third energy) of the four injections can be attributed to variations in the poloidal trajectories associated with each of these injections. Moreover, approximately half of fast ions which undergo neutralization directly lose to the first wall while the rest re-enters the bulk plasma and re-ionizes. Except for the ctr-tang injection, the reionization ions from the other three injections exhibit effective confinement.","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"59 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358204","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

Observation and analysis of positive leader re-illumination in a 10 m ultra-high voltage transmission line gap under switching impulse voltages 观察和分析开关冲击电压下 10 米超高压输电线路间隙中的正引线再发光现象

Plasma Science and Technology Pub Date : 2024-06-11 DOI: 10.1088/2058-6272/ad56cb

Biao Huang, Xuan Zhou, She Wang, C. Zhuang, Rong Zeng, Le Deng

{"title":"Observation and analysis of positive leader re-illumination in a 10 m ultra-high voltage transmission line gap under switching impulse voltages","authors":"Biao Huang, Xuan Zhou, She Wang, C. Zhuang, Rong Zeng, Le Deng","doi":"10.1088/2058-6272/ad56cb","DOIUrl":"https://doi.org/10.1088/2058-6272/ad56cb","url":null,"abstract":"\u0000 The leader propagation is one of the most important stages in long air gap discharge. The mechanism behind leader re-illumination remains unclear. In high humidity conditions (20.0–30.1 g/m³), we have conducted experiments of long sparks in a 10 m UHV transmission line gap under switching impulse voltages. The positive leaders predominantly propagate discontinuously, with almost no significantly continuous propagation occurring. The leader channels are intensely luminous and each elongation segment is straight, with streamers resembling the “branch type” which differs from the “diffuse type” streamers at the front of continuous propagation leaders. The distribution of the propagation velocities is highly random (3.7–18.4 cm/μs), and the average velocity (9.2 cm/μs) significantly exceeds that of continuous propagation (1.5–2.0 cm/μs). Analysis suggests that the current-velocity models suitable for continuous leader propagation do not align well with the experimental data in re-illumination mode. Based on the discharge current waveforms and optical images, it is speculated that the newly elongated leader in re-illumination mode does not evolve gradually from the stem (about 1 cm) but rather evolves overall from a thermal channel much longer than stem.","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"95 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359137","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

Effect of power supply parameters on the discharge characteristics and sterilization efficiency of magnetic driven rotating gliding arc 电源参数对磁驱动旋转滑行弧的放电特性和灭菌效率的影响

Plasma Science and Technology Pub Date : 2024-06-05 DOI: 10.1088/2058-6272/ad547d

Shaohua Qin, Meizhi Wang, Jun Du, Lanlan Nie, Jie Pan

{"title":"Effect of power supply parameters on the discharge characteristics and sterilization efficiency of magnetic driven rotating gliding arc","authors":"Shaohua Qin, Meizhi Wang, Jun Du, Lanlan Nie, Jie Pan","doi":"10.1088/2058-6272/ad547d","DOIUrl":"https://doi.org/10.1088/2058-6272/ad547d","url":null,"abstract":"\u0000 The plasma sterilization is a new generation of high-tech sterilization method, with the characteristics of fast, safe and pollution-free, widely used in medical, food and environmental protection fields. Home air sterilization is an emerging field of plasma application, which puts higher requirements on the miniaturization, operational stability, and operating cost of plasma device. In this paper, a novel magnetic driven rotating gliding arc (MDRGA) discharge device was used to sterilize lactobacillus fermentation. Compared to the traditional gas driven gliding arc, this device has a simple structure and more stable gliding arc. Simulation using COMSOL Multiphysics showed that adding permanent magnets can form a stable magnetic field, which is conducive to the formation of gliding arcs. Experiments were conducted on discharge performance, ozone concentration, and sterilization effect under different power supply parameters. The results revealed that the process of MDRGA can be divided into three stages: starting, gliding and extinguishing. The appropriate voltage was the key factor for stable arc gliding, and both high and low voltages were not conducive to stable arc gliding and Ozone production. For this experimental setup, the sterilization effect was best at 6.6 kV. High modulation duty ratio was beneficial for stable arc gliding, however, when the duty ratio exceeds a certain value, the improvement in sterilization effect was slow. So, considering the sterilization effect and energy factors comprehensively, for this experimental device, we choose 80% as the optimal modulation duty ratio.","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"301 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141386470","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

Loss of energetic particles due to feedback control of resistive wall mode in HL-3 HL-3 中电阻壁模式的反馈控制导致的高能粒子损失

Plasma Science and Technology Pub Date : 2024-06-05 DOI: 10.1088/2058-6272/ad547e

Yifei Zhao, Yueqiang Liu, Guangzhou Hao, Zhengxiong Wang, Guanqi Dong, Shuo Wang, Chunyu Li, Guanming Yang, Y. Miao, Yongqin Wang

{"title":"Loss of energetic particles due to feedback control of resistive wall mode in HL-3","authors":"Yifei Zhao, Yueqiang Liu, Guangzhou Hao, Zhengxiong Wang, Guanqi Dong, Shuo Wang, Chunyu Li, Guanming Yang, Y. Miao, Yongqin Wang","doi":"10.1088/2058-6272/ad547e","DOIUrl":"https://doi.org/10.1088/2058-6272/ad547e","url":null,"abstract":"\u0000 Effects of three-dimensional (3D) magnetic field perturbations due to feedback control of an unstable n = 1 (n is toroidal mode number) resistive wall mode (RWM) on the energetic particle (EP) losses are systematically investigated for the HL-3 tokamak. The MARS-F (Liu et al 2000 Phys. Plasmas 7 3681) code, facilitated by the test particle guiding center tracing module REORBIT, is utilized for the study. The RWM is found to generally produce no EP loss for co-current particles in HL-3. Assuming the same perturbation level at the sensor location for the close-loop system, feedback produces nearly the same loss of counter-current EPs compared to the open-loop case. Assuming however that the sensor signal is ten times smaller in the close-loop system than the open-loop counter part (reflecting the fact that the RWM is more stable with feedback), the counter-current EP loss is found significantly reduced in the former. Most of EP losses occur only for particles launched close to the plasma edge, while particles launched further away from the plasma boundary experience much less loss. The strike points of lost EPs on the HL-3 limiting surface become more scattered for particles launched closer to the plasma boundary. Taking into account the full gyro-orbit of particles while approaching the limiting surface, REORBIT finds slightly enhanced loss fraction.","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"28 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141386094","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

Laser-induced breakdown spectroscopy as a method for millimeter-scale inspection of surface flatness 激光诱导击穿光谱法作为毫米级检测表面平整度的一种方法

Plasma Science and Technology Pub Date : 2024-05-24 DOI: 10.1088/2058-6272/ad5067

Jinrui Ye, Ya-ju Li, Zhao Zhang, Xinwei Wang, Kewei Tao, Qiang Zeng, Liangwen Chen, D. Qian, Shaofeng Zhang, Lei Yang, Xinwen Ma

{"title":"Laser-induced breakdown spectroscopy as a method for millimeter-scale inspection of surface flatness","authors":"Jinrui Ye, Ya-ju Li, Zhao Zhang, Xinwei Wang, Kewei Tao, Qiang Zeng, Liangwen Chen, D. Qian, Shaofeng Zhang, Lei Yang, Xinwen Ma","doi":"10.1088/2058-6272/ad5067","DOIUrl":"https://doi.org/10.1088/2058-6272/ad5067","url":null,"abstract":"\u0000 A non-contact method for millimeter-scale inspection of materials’ surface flatness via Laser-Induced Breakdown Spectroscopy (LIBS) is investigated experimentally. The experiment is performed using a planished surface of an alloy steel sample to simulate its various flatness, ranging from 0 to 4.4 mm, by adjusting the laser focal plane to the surface distance with a step length of 0.2 mm. It is found that LIBS measurements are successful in inspecting the flatness differences among these simulated cases, implying that the method investigated here is feasible. It is also found that, for achieving the inspection of surface flatness within such a wide range, when univariate analysis is applied, a piecewise calibration model has to be constructed due to the complex dependence of plasma formation conditions on the surface flatness, which inevitably complicates the inspection procedure. To solve the problem, a multivariate analysis with the help of Back-Propagation Neural Network (BPNN) algorithms is applied to further construct the calibration model. By detailed analysis of the model performance, we demonstrate that a unified calibration model can be well established based on BPNN algorithms for unambiguous millimeter-scale range inspection of surface flatness with a resolution of about 0.2 mm.","PeriodicalId":506986,"journal":{"name":"Plasma Science and Technology","volume":"92 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141101149","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

Experimental confirmation of the linear relation between plasma current and external vertical magnetic field in EXL-50 spherical torus energetic electron plasmas EXL-50 球环形高能电子等离子体中等离子体电流与外部垂直磁场线性关系的实验证实

Plasma Science and Technology Pub Date : 2024-05-22 DOI: 10.1088/2058-6272/ad4f23

Lili Dong, Mingyuan Wang, Wenjun Liu, Yuejiang Shi, Jiaqi Dong, Dong Guo, Tiantian Sun, xiang gu, Xianming Song, Baoshan Yuan, Yuankai Peng

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Wavelength calibration and spectral analysis of vacuum ultraviolet spectroscopy in EAST EAST 真空紫外光谱仪的波长校准和光谱分析

Plasma Science and Technology Pub Date : 2024-05-22 DOI: 10.1088/2058-6272/ad4f24

Huajian Ji, Hongming Zhang, Bo Lyu, C. Bae, Liang He, Zichao Lin, Xianghui Yin, Yongcai Shen, Shuyu Dai

引用次数: 0