Plasma Science & Technology最新文献

Non-thermal atmospheric pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi2O3 catalyst 非热常压正脉动电晕放电对Bi2O3催化剂催化降解纺织染料活性蓝19的影响

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c9a

Milica Petrović, Dragan Radivojević, Saša Rančev, Nena Velinov, Miloš Kostić, Danijela Bojić, Aleksandar Bojić

{"title":"Non-thermal atmospheric pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi2O3 catalyst","authors":"Milica Petrović, Dragan Radivojević, Saša Rančev, Nena Velinov, Miloš Kostić, Danijela Bojić, Aleksandar Bojić","doi":"10.1088/2058-6272/ad0c9a","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c9a","url":null,"abstract":"Abstract Monoclinic Bi2O3 was applied for the first time, to the best of our knowledge, as a catalyst in a process of the dye degradation by the non-thermal atmospheric pressure positive pulsating corona discharge. The research focused on the interaction of the plasma-generated species and the catalyst, as well as its role in the degradation process. Plasma decomposition of the anthraquinone reactive dye Reactive Blue 19 (RB 19) was performed by the self- made reactor system. Bi2O3 was prepared by electrodeposition followed by thermal treatment, and characterized by XRD, SEM and EDX techniques. It was observed that the catalyst promoted decomposition of plasma-generated H2O2 into •OH radicals, the principle dye-degrading reagent, which further attacked the dye molecules. The catalyst improved the decolorization rate by 2.5 times, the energy yield by 93.4%, and the total organic carbon TOC removal by 7.1%, respectively. The excitation of the catalyst mostly occurred through the strikes of plasma-generated reactive ion and radical species from the air, accelerated by the electric field, as well as by the fast electrons with the energy of up to 15 eV, generated by the streamers reaching the liquid surface. Those strikes transferred the energy to the catalyst and created the electrons and holes which further reacted with H2O2 and water, producing the •OH radicals. This was indentified as the primary role of the catalyst in this process. Decolorization reactions followed the pseudo first order kinetics. Production of H2O2 and dye degradation rate increased with the increase of input voltage. The optimal catalyst dose was 500 mg dm-3. Decolorization rate was little lower in the river water compared to the one in deionized water due to the side reactions of •OH radicals with the organic matter and inorganic ions dissolved in the river water.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":"20 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134953762","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

Plasma nitrogen fixation system with dual-loop enhancement for improved energy efficiency and its efficacy for lettuce cultivation 双环增强等离子体固氮系统提高生菜栽培的能源效率和效果

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c96

Zeyang Han, Mengxue Zhang, Di Zhang, Xin He, Tianjun Jing, Zhixuan Ge, Yuge Li, Zhu Tong, Yunhong Ren, Chongshan Zhong, Fang Ji

{"title":"Plasma nitrogen fixation system with dual-loop enhancement for improved energy efficiency and its efficacy for lettuce cultivation","authors":"Zeyang Han, Mengxue Zhang, Di Zhang, Xin He, Tianjun Jing, Zhixuan Ge, Yuge Li, Zhu Tong, Yunhong Ren, Chongshan Zhong, Fang Ji","doi":"10.1088/2058-6272/ad0c96","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c96","url":null,"abstract":"Abstract Plasma nitrogen fixation (PNF) has been emerging as a promising technology for greenhouse gas-free and renewable energy-based agriculture. Yet, most PNF studies seldom address practical application-specific issues. In this work, we present the development of a compact and automatic PNF system for on-site agricultural applications. The system utilized a gliding-arc discharge as the plasma source and employed a dual-loop design to generate NO x - from air and water under atmospheric conditions. Experimental results showed that the system with a dual-loop design performs well in terms of energy costs and production rates. Optimal operational parameters for the system were determined through experimentation, resulting in an energy cost of 13.9 MJ mol −1 and an energy efficiency of 16 g kWh −1 for NO 3 - production, respectively. Moreover, the concentration of exhausted NO x was below the emission standards. Soilless lettuce cultivation experiments demonstrated that NO x - produced by the PNF system could serve as liquid nitrate nitrogen fertilizer. Overall, our work demonstrates the potential of the developed PNF system for on-site application in the production of green-leaf vegetables.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":"23 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954043","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

A dual-route optical emission spectroscopy diagnostic with wide spectral range and high wavelength resolution on HL-2A tokamak HL-2A托卡马克宽光谱范围、高波长分辨率的双路发射光谱诊断

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c95

Yue Chen, Jikun Gao, Ting Long, Lin Nie, Jinming Gao, Yao Ma, Yuan Huang, Wenjing Tian, Yanmin Liu, Xiaodong Zhu, Ge Zhuang, Wulyu Zhong, Min Xu

{"title":"A dual-route optical emission spectroscopy diagnostic with wide spectral range and high wavelength resolution on HL-2A tokamak","authors":"Yue Chen, Jikun Gao, Ting Long, Lin Nie, Jinming Gao, Yao Ma, Yuan Huang, Wenjing Tian, Yanmin Liu, Xiaodong Zhu, Ge Zhuang, Wulyu Zhong, Min Xu","doi":"10.1088/2058-6272/ad0c95","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c95","url":null,"abstract":"Abstract A dual-route optical emission spectroscopy (D-OES) diagnostic is newly developed to monitor the optical emission from X-point plasma region on the HL-2A tokamak. This diagnostic is composed of imaging system, beam splitting system for dual-route measurements, fiber bundles, spectrometer system, control and acquisition system. One route is used to obtain wide-spectral-range spectra, and the other route is used to acquire high-wavelength-resolution line shapes. The spectral resolution of the wide-range spectrometers is 0.8 nm with a coverage of 800 nm (@200-1000 nm). The spectral resolution of the high-resolution spectrometer is 0.01 nm with a coverage of 6 nm (@200-660 nm). The spatial resolution of each route of D-OES is about 4 cm with 11 channels. The temporal resolution is 16 ms at maximum in the single-channel mode. Wide-range spectra (containing Balmer series and Fulcher band) and highly resolved H_α line shapes are obtained by D-OES in the hydrogen glow discharge in the lab. D-OES measurements are carried out in the high-density deuterium experiments of HL-2A. The electron density n_e and deuterium temperature T_D in the X-point MARFE region are derived simultaneously by fitting the measured D_α shape. The density n_e is observed to increase from ~8.7×10^18 m^(-3) to ~7.8×10^19 m^(-3) and the temperature T_D drops from ~14.4 eV to ~2.3 eV after the onset of MARFE in the discharge #38260.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":"25 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954206","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

Ion heat transport in electron cyclotron resonance heated L-mode plasma on the T-10 tokamak T-10托卡马克上电子回旋共振加热l模等离子体中的离子热输运

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c9c

Vadim Krupin, Maxim Nurgaliev, Anton Nemets, Ivan Zemtsov, Stepan Suntsov, Tatyana Myalton, Dmitriy Sergeev, Nikita Solovev, Dmitriy Sarychev, Dmitriy Ryjakov, Sergey Tugarinov, Nikolay Naumenko

{"title":"Ion heat transport in electron cyclotron resonance heated L-mode plasma on the T-10 tokamak","authors":"Vadim Krupin, Maxim Nurgaliev, Anton Nemets, Ivan Zemtsov, Stepan Suntsov, Tatyana Myalton, Dmitriy Sergeev, Nikita Solovev, Dmitriy Sarychev, Dmitriy Ryjakov, Sergey Tugarinov, Nikolay Naumenko","doi":"10.1088/2058-6272/ad0c9c","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c9c","url":null,"abstract":"Abstract Anomalous ion heat transport is analyzed in the T-10 tokamak plasma heated with electron cyclotron resonance heating (ECRH) on second harmonic extra-ordinary mode. Predictive modeling with empirical scaling for Ohmical heat conductivity shows that in ECRH plasmas the calculated ion temperature could be overestimated, so the increase of anomalous ion heat transport is required. To study this effect two scans are presented: over the EC resonance position and over the ECRH power. EC resonance position varies from high field side to low field side by variation of toroidal magnetic field. Scan over the heating power is presented with on-axis and mixed ECRH regimes. Discharges with high anomalous ion heat transport are obtained in all considered regimes. In these discharges power balance ion heat conductivity exceeds neoclassical level up to 10 times. High ion heat transport regimes are distinguished by three parameters: T e /T i ratio, normalized electron density gradient R/L n e , and ion-ion collisionality ν ii ∗ . Combination of high T e /T i , high ν ii ∗ , and R/L n e =6-10 results in values of normalized anomalous ion heat fluxes up to 10 times higher than in low transport scenario.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":"18 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134953908","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

Gyro-Landau-fluid simulations of impurity effects on ion temperature gradient driven turbulence transport 杂质对离子温度梯度驱动湍流输运影响的陀螺-朗道流体模拟

3区物理与天体物理

Plasma Science & Technology Pub Date : 2023-11-14 DOI: 10.1088/2058-6272/ad0c9b

Yifei Liu, Jiquan Li

{"title":"Gyro-Landau-fluid simulations of impurity effects on ion temperature gradient driven turbulence transport","authors":"Yifei Liu, Jiquan Li","doi":"10.1088/2058-6272/ad0c9b","DOIUrl":"https://doi.org/10.1088/2058-6272/ad0c9b","url":null,"abstract":"Abstract The impurity effects on ion temperature gradient (ITG) driven turbulence transport in tokamak core plasmas are investigated numerically via global simulations of microturbulence with carbon impurities and adiabatic electrons using extended fluid code (ExFC) based on a four-field gyro-Landau-fluid (GLF) model. The multispecies form of the normalized GLF equations guaranteeing self-consistent evolution of both bulk ions and impurities is presented. With parametric profiles of the cyclone base case (CBC), well-benchmarked ExFC is employed to perform simulations focusing on different impurity density profiles. For fixed temperature profile, it is found that the turbulent heat diffusivity of bulk ions in quasi-steady state is usually lower than that without impurity, which is contrary to the linear and quasi-linear predictions. The evolutions of the temperature gradient and heat diffusivity exhibit a fast relaxation process, indicating that the destabilization of the outwardly peaked impurity profile is a transient state response. Furthermore, the impurity effects of different profiles can obviously influence the nonlinear critical temperature gradient, which are likely to be dominated by linear effects. These results may evidence the plasma confinement improvement by the impurities probably through adjusting both heat diffusivity and critical temperature gradient.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":"21 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134953894","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

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

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":"57 23","pages":"0"},"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

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":"57 21","pages":"0"},"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":"57 19","pages":"0"},"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