Measurement of magnetic field distribution produced by high-current pulse using Zeeman splitting of Na emission distributed by laser ablation

Jiang, Zhiyuan; Wu, Jian; Zhang, Daoyuan; Chen, Ziwei; Wang, Zhenyu; Shi, Huantong; Li, Xingwen; Qiu, Aici

doi:10.1063/5.0048319

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…For the simulation of single bubble growth, VOF method and gas-liquid mass transfer rate model are used to compile the changes of electrode surface electrochemical reaction rate, interfacial mass transfer rate, and dynamic contact angle into fluent computing platform through UDF. e mass transfer model and bubble evolution behavior are compared with the experimental results [18][19][20]. For the observation of bubble behavior and the influence of magnetic field on electrode potential difference, the experiment is carried out on the same experimental platform.…”

Section: Simulation Of Bubble Growth Behavior On Electrodementioning

confidence: 99%

Effect of Rotating Magnetic Field on Hydrogen Production from Electrolytic Water

Guo

Kim

2022

Shock and Vibration

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In order to reveal the influence of magnetic field on electrochemical machining, a research method of the influence of rotating magnetic field on hydrogen production from electrolytic water is proposed in this paper. Firstly, taking pure water as electrolyte, this paper selects rigid SPCE water molecular model, constructs the molecular dynamics model under the action of magnetic field, and simulates it. In this paper, the thermodynamics, electric power principle, and electrolytic reaction of hydrogen production from electrolytic water are analyzed, and the working processes of alkaline electrolytic cell, solid oxide electrolytic cell, and solid polymer electrolytic cell are analyzed. Based on solid polymer electrolytic cell, the effects of membrane electrode performance, diffusion layer material, contact electrode plate, electrolytic temperature, and electrolyte types on hydrogen production are analyzed. The experimental results show that the heteroions in the lake electrolyte significantly affect the performance of the membrane electrode, and the number of heteroions in the electrolyte should be controlled during the experiment. The hydrogen production capacity and energy efficiency ratio of the unit are basically not affected by different water flow dispersion. When dilute sulfuric acid electrolyte is selected in the experiment, the concentration should be 0.1%–0.2%; After the proton exchange membrane enters the stable period after the activation period, with the increase of the electrolysis time of tap water, (24 h) the membrane electrode will weaken the catalyst activity and reduce the electrolysis efficiency in the electrolysis process. Furthermore, the correctness of rotating magnetic field on hydrogen production from electrolytic water is verified.

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Section: Simulation Of Bubble Growth Behavior On Electrodementioning

confidence: 99%

Effect of Rotating Magnetic Field on Hydrogen Production from Electrolytic Water

Guo

Kim

2022

Shock and Vibration

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“…Studies on the skin effect show that the current density satisfies the Bessel function distribution on the cross-section of the wire when a pulsed electromagnetic field is loaded [23][24][25]. Furthermore, the magnetic field distribution calculated by combining the axial measurement and laser ablation technology indicates that the magnetic field is 5~15 T at a radial position of 5~7 mm [26]. The investigation of plasma evolution dynamics of the exploding thin Al liner shows that the effective current radius gets bigger with time because of the time-varying magnetic diffusion process [27].…”

Section: Introductionmentioning

confidence: 96%

Influence of the Wire Spatial Structure on the Distribution of Product and the Peak Overpressure of Shockwave Generated by the Electric Explosion

et al. 2023

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The deposition energy and the peak overpressure of shockwaves are the leading engineering parameters of wire electric explosion technology applied to enhance oil recovery. The thicker Cu wire deposits more energy, which transforms into the shockwave efficiently. Therefore, the effects of three diameters (0.3, 0.4, and 0.5 mm) and hollow ratios (0, 0.5, and 0.7) on the electric explosion efficiency were studied by collecting pulse current, explosion products, and shockwaves during the test. All spatial structure designs of the wire depend on the skin effect parameters of the pulse discharge current. The results found that the peak overpressure of the shockwave soars with the increase of the hollow ratios when the diameter is constant. The range of the peak overpressure is 25.2~47.7 MPa. However, the correlation between shockwave and wire diameter changes from negative to positive with the increase of the hollow ratio from 0 to 0.7. The phase distribution deduced by the particle morphology and quantity distribution indicates that it is going to be uniform gradually with the hollow ratio rising from 0 to 0.7. When the extreme simplification is carried out without considering the magnetic diffusion process, it is indicated that the distribution of temperature and phase states along the wire radial is a Bessel function depending on the skin effect of the current density when three times the theoretical enthalpy drives the Cu wire. It means that the desired shockwave could be obtained efficiently by increasing the diameter and the hollow ratio of wire during a wire electric explosion.

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“…Frequent variation makes the magnetic field distribution near the PFCs surface always unknown. Previous reports have shown that the intensity, direction and polarity of the magnetic field all affect the LIBS measurements [15,30,31]. At the same time, Wu et al found that the emission spectrum of laser-induced plasma shows obvious Zeeman splitting under an external magnetic field, which means that it seems feasible to use the Zeeman splitting to measure the magnetic field distribution near the PFCs [32].…”

Section: Introductionmentioning

confidence: 99%

“…Other auxiliary magnetic measurement methods may be meaningful in cases, where magnetic probe measurements are not possible or calculations of the magnetic field can be very imprecise. For instance, some complementary or optimized magnetic measurement methods are currently being developed to address the dynamic magnetic field distributions in stellarators (complex magnetic structures), spherical tokamaks (magnetic probes are hardly inserted in the inboard side of the plasma), and Z-pinch machines [4,14,15]. In this work, the development of a non-intrusive method for measuring magnetic field distribution on the wall surface, which is not affected by the different wall material and does not take into account the problems of high thermal load and high-energy particle bombardment, is valuable for perfecting and verifying the information obtained by conventional magnetic diagnosis.…”

Section: Introductionmentioning

confidence: 99%

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

Wu,

et al. 2024

Nucl. Fusion

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Magnetic field measurement is the basic diagnosis to obtain the physical engineering parameters of magnetic confinement fusion device and the macro information of plasma discharge. The real-time diagnosis of magnetic field distribution near the plasma-facing components (PFCs) surface provides the important information on the migration and transport model of key elements. In this work, a remote, in-situ approach for the magnetic field measurement near the surface of PFCs by the polarization-resolved laser-induced breakdown spectroscopy (PRLIBS) based on Zeeman effect is proposed and implemented. The Zeeman characteristics of the emission spectra of laser-induced W, Mo and C plasmas were verified in the laboratory by using different magnetic field configurations. According to the polarization characteristics of the Zeeman sublines of the LIBS spectrum, the intensity and direction of the external local magnetic field were successively identified by using a linear polarizer. Subsequently, a linear array fiber was utilized to determine the polarity of the external magnetic field. And finally, the magnetic field intensity near the lower edge surface of the tungsten baffle of the EAST upper divertor was measured when the field coils were demagnetized. This method can supplement the experimental data near the PFCs for the magnetic field configuration of the magnetic confinement fusion device and provide a reference for the wall element analysis model diagnosed by LIBS.

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Measurement of magnetic field distribution produced by high-current pulse using Zeeman splitting of Na emission distributed by laser ablation

Cited by 6 publications

References 25 publications

Effect of Rotating Magnetic Field on Hydrogen Production from Electrolytic Water

Effect of Rotating Magnetic Field on Hydrogen Production from Electrolytic Water

Influence of the Wire Spatial Structure on the Distribution of Product and the Peak Overpressure of Shockwave Generated by the Electric Explosion

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

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