Journal of Applied Physics最新文献_第3页

Laser absorption correction for hydroxyl planar laser induced fluorescence measurements in a centrally staged combustor at elevated pressures 高压下中央分段燃烧器中羟基平面激光诱导荧光测量的激光吸收校正

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-19 DOI: 10.1063/5.0228168

Kexin Ji, Xin Hui, Chao Tao, Xin Xue, Qiang An

{"title":"Laser absorption correction for hydroxyl planar laser induced fluorescence measurements in a centrally staged combustor at elevated pressures","authors":"Kexin Ji, Xin Hui, Chao Tao, Xin Xue, Qiang An","doi":"10.1063/5.0228168","DOIUrl":"https://doi.org/10.1063/5.0228168","url":null,"abstract":"Planar laser-induced fluorescence (PLIF) is a crucial spectroscopic technique for measuring minor species [e.g., hydroxyl (OH), methylene (CH), and nitric oxide (NO) radicals] in combustion research, owing to its non-intrusive nature and high sensitivity. However, laser energy attenuation due to absorption poses significant challenges to its application under high-pressure conditions, which may cause asymmetric image intensity distribution along the light propagation direction. An absorption correction method for OH PLIF based on the concept of maximum number density is proposed in the present study. This method offers several key advantages, including simplicity, high accuracy, and versatility, allowing for correcting both time-averaged and instantaneous OH PLIF images. OH PLIF data obtained from a centrally staged combustor at elevated pressures (i.e., 0.3, 0.6, and 1.0 MPa) are utilized to validate the method. Correction for the time-averaged PLIF images achieves a much more symmetric distribution of OH, revealing the overall flame structures that would not have been completely visualized from the original images. The fronts of the pilot and main stage flames have also been recovered from the corrected instantaneous images. This correction algorithm provides an effective way of enhancing data quality for high-cost OH PLIF measurements at pressurized conditions.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"118 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260280","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

Focus control of a concave–convex ultrasonic gel lens in the radial direction 凹凸超声波凝胶透镜径向聚焦控制

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-18 DOI: 10.1063/5.0218754

K. Tagashira, Y. Harada, K. Nakamura, H. Miki, M. Matsukawa, D. Koyama

{"title":"Focus control of a concave–convex ultrasonic gel lens in the radial direction","authors":"K. Tagashira, Y. Harada, K. Nakamura, H. Miki, M. Matsukawa, D. Koyama","doi":"10.1063/5.0218754","DOIUrl":"https://doi.org/10.1063/5.0218754","url":null,"abstract":"Optical image stabilization (OIS) systems maintain the three-dimensional focal position of a lens through mechanical actuation systems. This paper examines an optical lens for OIS that utilizes ultrasound vibration to alter the focal position, not only in the depth direction but also in the radial direction. The lens has a simple structure with no mechanical moving parts and consists of an ultrasound transducer divided into four pieces, a glass disk, and a transparent viscoelastic gel film that functions as a lens. The acoustic radiation force generated by the resonant flexural vibration of the glass disk can alter the surface profile of the gel film, allowing for a variable-focus function. The concave and convex lenses can be interchanged using two resonant vibration modes: the standing-wave mode, in which the vibration loop appears at the center, and the traveling-wave mode, in which the vibration node appears at the center. The positions of ultrasound vibrations on the lens can be controlled in a two-dimensional plane by adjusting the driving amplitudes of each channel, thereby achieving focus control in the radial direction. The focusing characteristics of the lens are evaluated through ray-tracing simulation.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"17 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260288","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

Continuum models for meso-scale simulations of HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) guided by molecular dynamics: Pore collapse, shear bands, and hotspot temperature 分子动力学指导下的 HMX（1,3,5,7-tetranitro-1,3,5,7-tetrazocane）中尺度模拟连续模型：孔隙塌陷、剪切带和热点温度

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-18 DOI: 10.1063/5.0232413

Yen Thi Nguyen, Chukwudubem Okafor, Puhan Zhao, Oishik Sen, Catalin R. Picu, Tommy Sewell, H. S. Udaykumar

{"title":"Continuum models for meso-scale simulations of HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) guided by molecular dynamics: Pore collapse, shear bands, and hotspot temperature","authors":"Yen Thi Nguyen, Chukwudubem Okafor, Puhan Zhao, Oishik Sen, Catalin R. Picu, Tommy Sewell, H. S. Udaykumar","doi":"10.1063/5.0232413","DOIUrl":"https://doi.org/10.1063/5.0232413","url":null,"abstract":"Meso-scale calculations of energy localization and initiation in energetic material microstructures must capture the deformation and collapse of pores and high-temperature shear bands, which lead to hotspots. Because chemical reaction rates depend sensitively on temperature, predictive continuum models need to get the pore-collapse dynamics and resulting hotspot temperatures right; this imposes stringent demands on the fidelity of thermophysical model forms and parameters and on the numerical methods employed to perform high-resolution meso-scale calculations. Here, continuum material models for β-HMX are examined in the context of shock-induced pore collapse, treating predictions from all-atom molecular dynamics (MD) simulations as ground truth. Using atomistics-consistent material properties, we show that the currently available strength models for HMX fail to correctly capture pore collapse and hotspot temperatures. Insights from MD are then employed to advance a Modified Johnson–Cook (M-JC) strength model, which is shown to capture key aspects of the physics of shock-induced localization in HMX. The study culminates in a MD-guided strength model for β-HMX that produces continuum pore-collapse results in better alignment on several aspects with those predicted by MD, including pore-collapse mechanism and rate, shear-band formation in the collapse zone, and temperature, strain, and stress fields in the hotspot zone and the surrounding material. The resulting MD-informed/MD-determined M-JC model should improve the fidelity of meso-scale simulations to predict the detonation initiation of HMX-based energetic materials in microstructure-aware multi-scale frameworks.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"31 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260285","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

Optical actinometry for number density measurements in low-pressure plasmas: Advantages, error sources, and method validation 用于测量低压等离子体中数量密度的光学致动测量法：优势、误差源和方法验证

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-18 DOI: 10.1063/5.0227576

Nikolay Britun, Michael K. T. Mo, Shih-Nan Hsiao, Fatima J. T. Arellano, Makoto Sekine, Masaru Hori

{"title":"Optical actinometry for number density measurements in low-pressure plasmas: Advantages, error sources, and method validation","authors":"Nikolay Britun, Michael K. T. Mo, Shih-Nan Hsiao, Fatima J. T. Arellano, Makoto Sekine, Masaru Hori","doi":"10.1063/5.0227576","DOIUrl":"https://doi.org/10.1063/5.0227576","url":null,"abstract":"Number density of plasma-generated atoms or molecules is an important parameter for both fundamental research and applications. It can be measured in a straightforward manner, using vacuum-ultraviolet absorption spectroscopy, which is mainly possible in laboratory conditions as it may require bulky equipment, such as lasers. By contrast, optical actinometry is an alternative approach that only uses spontaneous emission from the plasma. This technique relies on the so-called corona excitation and uses emission line ratios between the gases with unknown and known concentrations (called actinometer in the last case). As a result of using line ratios, the additional density calibration is not required if the excitation cross sections are known. This study discusses Ar-based actinometry in low-pressure (roughly &lt;1 kPa) plasma discharges with an emphasis on multiple line ratios. The work is particularly focused on the method’s applicability, the choice of Ar cross sections, and potential error sources. The influence of the additional excitation mechanisms is analyzed based on both experiments and modeling. The optical transitions for F, O, H, N, and P atoms along with expressions for their number density are presented, not requiring high optical resolution for measurements. For the sake of method validation, it is shown that in low-pressure radiofrequency discharges, a nearly excellent agreement between the actinometry data and the calibrated measurements can be achieved by careful selection of optical transitions.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"19 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260284","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

Ultrafast manipulations of nanoscale skyrmioniums 纳米级天铱的超快操作

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-18 DOI: 10.1063/5.0227996

H. M. Dong, P. P. Fu, Y. F. Duan, K. Chang

引用次数: 0

The novel impedance matching device realized by the structure of air-gap ring based on the doping method at microwave frequency 基于掺杂法的气隙环结构在微波频率下实现的新型阻抗匹配器件

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-18 DOI: 10.1063/5.0230486

Lin Zhao, Jiaxin Li, Li Pan

{"title":"The novel impedance matching device realized by the structure of air-gap ring based on the doping method at microwave frequency","authors":"Lin Zhao, Jiaxin Li, Li Pan","doi":"10.1063/5.0230486","DOIUrl":"https://doi.org/10.1063/5.0230486","url":null,"abstract":"The doping method enabled the epsilon-near-zero (ENZ) medium to adjust its permeability effectively. In this study, we theoretically analyze that the gap ring structure formed by the ENZ medium doped with perfect electrical conductor (PEC) can be equivalent to the controllable series reactance. Based on this concept, a universal matching network that can match any complex impedance load by adjusting the gap ring spacing is constructed. We used the above universal matching network to carry out theoretical and simulation calculations on the matching effect of a random-sized stepped waveguide and horn antenna, and the results show that the impedance-matching technology has a good matching effect for different loads. Finally, experimental verification is carried out. Compared with traditional impedance-matching networks, the proposed structure has the characteristics of simplicity, reliability, low loss, high carrying power, low preparation requirements, and good application prospects. This work is a good example of the practicality of ENZ media and also provides a very meaningful idea for the development of new electromagnetic matching devices.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"29 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260283","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

Multicaloric response tuned by electric field in cylindrical MnAs/PZT magnetoelectric composite 通过电场调节圆柱形 MnAs/PZT 磁电复合材料的多磁响应

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-17 DOI: 10.1063/5.0231720

Abdulkarim A. Amirov, Maksim A. Koliushenkov, Abdula A. Mukhuchev, Dibir M. Yusupov, Valeriya V. Govorina, Dmitriy S. Neznakhin, Gennady A. Govor, Akhmed M. Aliev

{"title":"Multicaloric response tuned by electric field in cylindrical MnAs/PZT magnetoelectric composite","authors":"Abdulkarim A. Amirov, Maksim A. Koliushenkov, Abdula A. Mukhuchev, Dibir M. Yusupov, Valeriya V. Govorina, Dmitriy S. Neznakhin, Gennady A. Govor, Akhmed M. Aliev","doi":"10.1063/5.0231720","DOIUrl":"https://doi.org/10.1063/5.0231720","url":null,"abstract":"The possibility observation of the electric field controlled multicaloric response through quasi-isostatic compression as a result of the converse piezoelectric effect was demonstrated on the cylindrical type magnetoelectric composite MnAs/PZT. It was shown that an electric voltage of 100 V corresponding to an electric field of E ∼0.3 kV/mm applied to the walls of the piezoelectric component PZT of the MnAs/PZT composite contributes to an increase in the maximum adiabatic temperature change by 0.2 K in the temperature range of the magnetostructural phase transition of MnAs ∼317 K at a magnetic field change of 1.8 T. Numerical analysis using the finite element method has shown that an electric field voltage of 100 V is capable of creating a quasi-isostatic mechanical stress in the region inside a cylindrical PZT tube of ∼3 MPa. Moreover, in the region of weak pressures up to 10 MPa, the contribution to the total adiabatic temperature change from piezo-mechanical compression linearly depends on the electrical voltage that can be used for control by magnetic and caloric properties of multicaloric materials.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"21 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260291","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

Performance optimization for magnetoelectric antennas based on a multi-field coupling analysis model 基于多场耦合分析模型的磁电天线性能优化

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-17 DOI: 10.1063/5.0231433

Yue Mao, Qiyuan Jiao, Yang Shi

{"title":"Performance optimization for magnetoelectric antennas based on a multi-field coupling analysis model","authors":"Yue Mao, Qiyuan Jiao, Yang Shi","doi":"10.1063/5.0231433","DOIUrl":"https://doi.org/10.1063/5.0231433","url":null,"abstract":"This paper presents a multi-field coupling model for magnetoelectric (ME) antennas, encompassing a ME film, electrode layers, and a substrate featuring a cavity structure. This model accounts for the nonlinear magnetoelastic coupling within the radiation layer and employs a combined DC and AC simulation methodology to capture the antenna's radiation mechanism. Leveraging this multi-field coupling model, performance differences between the ME antenna and an ideal ME composite film are analyzed. By exploring optimization schemes based on multi-physics fields, electrode materials, and structural design, the ME antenna's radiation performance is significantly enhanced. The findings demonstrate that the complete antenna structure, with its increased thickness and cavity design, exhibits a lower resonance frequency and a higher converse ME (CME) coefficient compared to the ideal ME film. The optimal CME effect is achieved under proper external stimuli, leading to a broader 3 dB bandwidth. Expanding the cavity dimensions enhances the CME coefficient by 42% and reduces the resonance frequency due to decreased acoustic wave loss. Adopting electrode materials with higher acoustic impedance elevates the CME coefficient, yet narrows the bandwidth. Conversely, using silver (Ag) electrodes promotes a broader bandwidth. Additionally, ME antenna arrays are designed to broaden the bandwidth by 300%.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"29 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260333","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

An innovative approach to control the Hf/Ti ratio in monolayers grown via atomic partial layer deposition 控制通过原子部分层沉积生长的单层中 Hf/Ti 比率的创新方法

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-17 DOI: 10.1063/5.0225744

M. I. Pérez-Valverde, E. López-Luna, E. Martínez-Guerra, J. G. R. Hernández-Arteaga, M. A. Vidal

引用次数: 0

An electro-thermal finite element method (FEM) model for local hotspot kinetics in Cu(In, Ga)Se2 thin-film solar modules 铜铟镓硒薄膜太阳能模块局部热点动力学的电热有限元法 (FEM) 模型

IF 3.2 3区物理与天体物理

Journal of Applied Physics Pub Date : 2024-09-17 DOI: 10.1063/5.0222051

Suheir Nofal, Timon S. Vaas, Uwe Rau, Bart E. Pieters

{"title":"An electro-thermal finite element method (FEM) model for local hotspot kinetics in Cu(In, Ga)Se2 thin-film solar modules","authors":"Suheir Nofal, Timon S. Vaas, Uwe Rau, Bart E. Pieters","doi":"10.1063/5.0222051","DOIUrl":"https://doi.org/10.1063/5.0222051","url":null,"abstract":"Partial shading can significantly impair the efficiency of thin-film solar cells. When exposed to partial shading, cells within the array tend to become reverse biased, leading to thermal runaway events and the emergence of hotspots. In Cu(In,Ga)Se2 (CIGS) solar cells such hotspots are also associated with so-called worm-like defects. Both theoretical and experimental studies have shown that in CIGS, a positive-feedback loop leads to instability and thermal runaway events. However, we observe an inconsistency between published simulation results and recently published experimental work. In a recent experimental study, it was shown that under certain conditions, a hotspot develops within 1ms, showing signs of melting of the CIGS in an area with a 5μm radius. However, in published simulation results, the time for such high temperatures to develop is in the order of seconds, a discrepancy of three orders of magnitude. In this work, we argue that this discrepancy is explained by the size of the seed defect, demonstrating that the origin of these experimentally observed, fast-developing hotspots is likely microscopic defects. To this end, we developed an electro-thermal finite element model, with very high temporal and spatial resolution. We demonstrate that, assuming a seed defect with a 10nm radius, we can reproduce the experimental results with respect to the size of the defect and the time it took to develop.","PeriodicalId":15088,"journal":{"name":"Journal of Applied Physics","volume":"48 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260289","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