Plasma Science & Technology最新文献_第7页

Multi-layer phenomena in petawatt laser-driven acceleration of heavy ions 千瓦激光驱动重离子加速中的多层现象

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c97

Wanqing Su, Xiguang CAO, Chunwang Ma, Yuting WANG, Guoqiang ZHANG

引用次数: 0

Numerical analysis for the free-boundary current reversal equilibrium in the AC plasma current operation in Tokamak 托卡马克交流等离子体电流运行中自由边界电流反转平衡的数值分析

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c98

Yemin Hu, Liuqing Wang, Shuhang Bai, Zhi Yu, Tianyang Xia

引用次数: 0

Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators 基于栅格型和超密阵列等离子体作动器的翼型摩擦减阻

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c99

Ziqi Fang, Haohua Zong, Yun Wu, Hua Liang, Zhi Su

{"title":"Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators","authors":"Ziqi Fang, Haohua Zong, Yun Wu, Hua Liang, Zhi Su","doi":"10.1088/2058-6272/ad0c99","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c99","url":null,"abstract":"Abstract To improve the cruise flight performance of aircraft, two new configurations of plasma actuators (grid-type and super-dense array) were investigated to reduce the turbulent skin friction drag of a low-speed airfoil. The induced jet characteristics of the two actuators in quiescent air were diagnosed with high-speed particle image velocimetry (PIV), and their drag reduction efficiencies were examined under different operating conditions in a wind tunnel. The results showed that the grid-type plasma actuator was capable of producing a wall-normal jet array (peak magnitude: 1.07 m/s) similar to that generated in a micro-blowing technique, while the super-dense array plasma actuator created a wavy wall-parallel jet (magnitude: 0.94 m/s) due to the discrete spanwise electrostatic forces. Under a comparable electrical power consumption level, the super-dense array plasma actuator array significantly outperformed the grid-type configuration, reducing the total airfoil friction drag by approximately 22% at a free-stream velocity of 20 m/s. The magnitude of drag reduction was proportional to the dimensionless jet velocity ratio (r), and a threshold r = 0.014 existed under which little impact on airfoil drag could be discerned.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The research progress of an E//B neutral particle analyzer E//B中性颗粒分析仪的研究进展

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c20

Long Ma, Yufan Qu, Yuan Luo, Dehao Xie, Yanxi Wang, Shuo Wang, Guofeng Qu, Peipei Ren, Xiaobing Luo, Xingquan Liu, Jifeng Han, Roy Wada, Weiping Lin, Linge Zang, Jingjun Zhu

{"title":"The research progress of an E//B neutral particle analyzer","authors":"Long Ma, Yufan Qu, Yuan Luo, Dehao Xie, Yanxi Wang, Shuo Wang, Guofeng Qu, Peipei Ren, Xiaobing Luo, Xingquan Liu, Jifeng Han, Roy Wada, Weiping Lin, Linge Zang, Jingjun Zhu","doi":"10.1088/2058-6272/ad0c20","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c20","url":null,"abstract":"Abstract An E//B neutral particle analyzer (NPA) has been designed and is under development at Sichuan&#xD;University and Southwestern Institute of Physics. The main purpose of the E//B NPA is to measure the&#xD;distribution function of fast ions on HL-2A/M tokamak. The E//B NPA contains three main units, i.e.&#xD;the stripping unit, the analyzing unit and the detection unit. A gas stripping chamber was adopted as&#xD;the stripping unit. Results of the simulations and beam tests for the stripping chamber are presented.&#xD;The parallel electric and magnetic fields provided by a NdFeB permanent magnet and two parallel&#xD;electric plates were designed and constructed for the analyzing unit. The calibration of the magnetic&#xD;and electric fields was performed at the 50 kV electron cyclotron resonance ion source (ECRIS)&#xD;platform. The detection unit consists of 32 LYSO detector modules arranged in 2 rows. The response&#xD;functions of α, hydrogen ions (H+, H+2 and H+3 ) and γ for a detector module were measured with&#xD;241Am, 137Cs and 152Eu sources together with the 50 kV ECRIS platform. Overall results indicate that&#xD;the designed E//B NPA device is capable to measure the intensity of neutral hydrogen and deuteron atoms with energy higher than 20 keV.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Spatial and temporal evolution of electromagnetic pulses from solid target irradiated with multi-hundred-terawatt laser pulse inside target chamber 靶腔内几百太瓦激光脉冲辐照固体目标电磁脉冲的时空演化

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c21

Qiangyou He, ZhiGang Deng, Zhimeng Zhang, Yadong Xia, Bo Zhang, Lingbiao Meng, Shukai He, Hua Huang, Lei Yang, Hongjie Liu, Wei Fan, Chen Lin, Weimin Zhou, Tingshuai Li, Xueqing Yan

{"title":"Spatial and temporal evolution of electromagnetic pulses from solid target irradiated with multi-hundred-terawatt laser pulse inside target chamber","authors":"Qiangyou He, ZhiGang Deng, Zhimeng Zhang, Yadong Xia, Bo Zhang, Lingbiao Meng, Shukai He, Hua Huang, Lei Yang, Hongjie Liu, Wei Fan, Chen Lin, Weimin Zhou, Tingshuai Li, Xueqing Yan","doi":"10.1088/2058-6272/ad0c21","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c21","url":null,"abstract":"Abstract Giant electromagnetic pulses (EMPs) induced by high-power laser irradiating solid targets interfere with various experimental diagnoses and even damage equipment, so unveiling the evolution of EMPs inside the laser chamber is crucial for designing effective EMP shielding. In this work, the transmission characteristics of EMPs as a function of distances from the target chamber center (TCC) are studied using B-dot probes. The mean EMP amplitude generated by picosecond laser-target interaction reaches 561 kV m-1, 357 kV m-1, 395 kV m-1, and 341 kV m-1 at 0.32 m, 0.53 m, 0.76 m, and 1 m from TCC, which decreases dramatically from 0.32 m to 0.53 m. However, it shows a fluctuation from 0.53 m to 1 m. The temporal features of EMPs indicate that time-domain EMP signals near the target chamber wall have a wider full width at half maximum compared to that close to TCC, mainly due to the echo oscillation of electromagnetic waves inside the target chamber based on simulation and experimentation. The conclusions of this study will provide a new approach to mitigate strong electromagnetic pulses by decreasing the echo oscillation of electromagnetic waves inside the target chamber during laser coupling with targets.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Modification of streamer-to-leader transition model based on radial thermal expansion in the sphere-plane gap discharge at high altitude 基于径向热膨胀的高海拔球面间隙放电流-前导过渡模型修正

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c1c

Jianghai Geng, Guo Lin, Ping Wang, Yujian Ding, Yang Ding, Hua Yu

{"title":"Modification of streamer-to-leader transition model based on radial thermal expansion in the sphere-plane gap discharge at high altitude","authors":"Jianghai Geng, Guo Lin, Ping Wang, Yujian Ding, Yang Ding, Hua Yu","doi":"10.1088/2058-6272/ad0c1c","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c1c","url":null,"abstract":"Abstract Historically, the streamer-to-leader transition studies mainly focused on the rod-plane gap and low altitude analysis, with limited attention paid to the sphere-plane gap at high altitude analysis. In this paper, the sphere-plane gap discharge tests were carried out under the gap distance of 5m at the Qinghai Ultra High Voltage (UHV) test base at an altitude of 2200m. The experiments measured the physical parameters such as discharge current, electric field intensity and instantaneous optical power. The duration of the dark period and the critical charge of streamer-to-leader transition were obtained at high altitude. Based on radial thermal expansion of streamer stem, we established a modified streamer-to-leader transition model of the sphere-plane gap discharge at high altitude, and calculated the stem temperature, stem radii and the duration of streamer-to-leader transition. Compared with measured duration of sphere-plane electrode discharge at an altitude of 2200m, the error rate of the modified model was 0.94%, while the classical model was 6.97%, demonstrating the effectiveness of the modified model. From the comparisons and analysis, several suggestions are proposed to improve the numerical model for further quantitative investigations of the leader inception.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire-cylinder gap 基于同轴线筒间隙的不同高度负电晕放电特性及无线电干扰

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c1d

Wangling He, Hongyu Wei, Yinlu Zhang, Yongcong Liu, Yunpeng Liu, Baoquan Wan, Yang Zhou, Yanzhao Wan, Zheyuan Gan

{"title":"The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire-cylinder gap","authors":"Wangling He, Hongyu Wei, Yinlu Zhang, Yongcong Liu, Yunpeng Liu, Baoquan Wan, Yang Zhou, Yanzhao Wan, Zheyuan Gan","doi":"10.1088/2058-6272/ad0c1d","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c1d","url":null,"abstract":"Abstract The corona discharge from transmission lines in high-altitude areas is more severe than that in plain areas. The radio interferences caused thereby are key factors to be considered in the design of transmission lines. To study the influence of altitude on the negative corona characteristics, a movable small corona cage experimental platform was established: experiments were conducted at four altitudes in the range of 1120‒4320m, and the corona current pulse and radio interference level of 0.8-mm diameter fine copper wire under different negative voltages were collected. The experimental results show that the average amplitude, repetition frequency, and average current of corona current pulse increase with the increase of altitude. The dispersion of pulse amplitude increases with the increase of altitude, while the randomness of pulse interval decreases continuously. Taking the average current as an intermediate variable, the relationship of radio interference level with altitude is obtained. The research has certain guiding significance for understanding the corona discharge characteristics of ultra-high voltage lines.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Preliminary electromagnetic analysis of the COOL blanket for CFETR CFETR冷毯的初步电磁分析

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c23

Shuailing Lu, Xuebin Ma, Songlin Liu

引用次数: 0

Different bactericidal abilities of plasma-activated saline with varied reactive species prepared by the combinations of surface plasma-activated air and plasma jet 表面等离子体活化空气与等离子体射流组合制备的不同活性物质的等离子体活性盐水的不同杀菌能力

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c1f

Yikang Jia, Tianhui Li, Rui Zhang, Pengyu Zhao, Zifeng Wang, Min Chen, Li Guo, Dingxin Liu

{"title":"Different bactericidal abilities of plasma-activated saline with varied reactive species prepared by the combinations of surface plasma-activated air and plasma jet","authors":"Yikang Jia, Tianhui Li, Rui Zhang, Pengyu Zhao, Zifeng Wang, Min Chen, Li Guo, Dingxin Liu","doi":"10.1088/2058-6272/ad0c1f","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c1f","url":null,"abstract":"Abstract Plasma-activated water (PAW), as an extended form of cold atmospheric-pressure plasma, greatly expands the application of plasma-based technology. The biological effects of PAW are closely related to the aqueous reactive species, which can be regulated by the activation process. In this study, the surface plasma-activated air (SAA) and the He + O2 plasma jet (Jet) were parallelly combined (the SAA + Jet combination) or sequential combined (the SAA → Jet combination and the Jet → SAA combination) to prepare plasma-activated saline (PAS). The PAS activated by the combinations exhibited stronger bactericidal effects than that activated by the SAA or the Jet alone. The concentrations of H2O2 and NO2− were higher in the PAS activated by the Jet → SAA combination, while ONOO− were close in the three kinds of PAS and 1O2 were highest in the PAS activated by the SAA + Jet combination. The analysis of scavengers also demonstrated that H2O2, 1O2, and ONOO‒ in the PAS activated by the SAA + Jet combination, and 1O2 in the PAS activated by the Jet → SAA combination played critical roles in bactericidal effects. Further, the effective placement time of the three PAS varied and the PAS activated by the Jet → SAA combination could also inactivate 2.6-log10 of the MRSA cells after placement for more than 60 min. The regulation of reactive species in plasma-activated water through different combinations of plasma devices could improve the directional application of plasma-activated water in the biomedical field.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Characteristics of the SOL ion-to-electron temperature ratio on the J-TEXT tokamak with different plasma configurations J-TEXT托卡马克不同等离子体构型下SOL离子电子温度比的特性

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-13 DOI: 10.1088/2058-6272/ad0c1e

Cunkai Li, Yunfeng Liang, Zhonghe Jiang, Song Zhou, Jiankun Hua, Jie Yang, Qinghu Yang, Alexander Knieps, Philipp Drews, Xin Xu, Feiyue Mao, Wei Xie, Yutong Yang, Jinlong Guo, Yangbo Li, Zhengkang Ren, Zhipeng Chen, Nengchao Wang

{"title":"Characteristics of the SOL ion-to-electron temperature ratio on the J-TEXT tokamak with different plasma configurations","authors":"Cunkai Li, Yunfeng Liang, Zhonghe Jiang, Song Zhou, Jiankun Hua, Jie Yang, Qinghu Yang, Alexander Knieps, Philipp Drews, Xin Xu, Feiyue Mao, Wei Xie, Yutong Yang, Jinlong Guo, Yangbo Li, Zhengkang Ren, Zhipeng Chen, Nengchao Wang","doi":"10.1088/2058-6272/ad0c1e","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c1e","url":null,"abstract":"Abstract Accurate measurements of the edge plasma equilibrium profiles, including the temperature and density of electrons and ions, are critical to understanding the characteristics of the scrape-off layer (SOL) and divertor plasma transport in magnetically confined fusion research. On the J-TEXT tokamak, a multi-channel retarding field analyzer (RFA) probe has been developed to study edge plasma equilibrium profiles under various poloidal divertor and island divertor configurations. The edge radial profile of the ion-to-electron temperature ratio, τ_{i/e}, has been determined, which gradually decreases as the SOL ion self-collisionality, ν_{SOL}^*, increases. This is widely consistent with what has been observed previously from various tokamak experiments. However, the comparison of experimental results under different configurations shows that in the poloidal divertor configuration, even under the same ν_{SOL}^*, τ_{i/e} in the SOL region becomes smaller as the distance from the X-point to the target plate increases. In the island divertor configuration, τ_{i/e} near the O-point is higher than that near the X-point at the same ν_{SOL}^*, and both are higher than the limiter configuration. These results suggest that the magnetic configuration plays a critical role in the energy distributions between electrons and ions at the plasma boundary.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136281632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0