Chinese Physics B最新文献_第8页

A Graph Neural Network Approach to the Inverse Design for Thermal Transparency with Periodic Interparticle System 采用图神经网络方法进行具有周期性粒子间系统的热透明度反向设计

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-25 DOI: 10.1088/1674-1056/ad4326

Bin Liu, Yixi Wang

引用次数: 0

Investigation of the power transfer efficiency in an air-breathing radio frequency ion thruster 研究喷气式射频离子推进器的功率传输效率

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-24 DOI: 10.1088/1674-1056/ad426c

Gao-Huang Huang, Hong Li, Fei Gao, You-Nian Wang

{"title":"Investigation of the power transfer efficiency in an air-breathing radio frequency ion thruster","authors":"Gao-Huang Huang, Hong Li, Fei Gao, You-Nian Wang","doi":"10.1088/1674-1056/ad426c","DOIUrl":"https://doi.org/10.1088/1674-1056/ad426c","url":null,"abstract":"\u0000 Due to a series of challenges such as low-orbit maintenance of satellites, the air-breathing electric propulsion has got widespread attention. Commonly, the radio frequency ion thruster is favored by low-orbit missions due to its high specific impulse and efficiency. In this paper, the power transfer efficiency of the radio frequency ion thruster with different gas composition is studied experimentally, which is obtained by measuring the radio frequency power and current of the antenna coil with and without discharge operation. The results show that increasing the turns of antenna coils can effectively improve the radio frequency power transfer efficiency, which is due to the improvement of Q factor. In pure N2 discharge, with the increase of radio frequency power, the radio frequency power transfer efficiency first rises rapidly and then exhibits a less steep increasing trend. The radio frequency power transfer efficiency increases with the increase of gas pressure at relatively high power, while declines rapidly at relatively low power. In N2/O2 discharge, increasing the N2 content at high power can improve the radio frequency power transfer efficiency, but the opposite was observed at low power. In order to give a better understanding of these trends, an analytic solution in limit cases is utilized, and a Langmuir probe was employed to measure the electron density. It is found that the evolution of radio frequency power transfer efficiency can be well explained by the variation of plasma resistance, which is related to the electron density and the effective electron collision frequency.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140665765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spectral characteristics of laser plasma instabilities with broadband laser 宽带激光等离子体不稳定性的光谱特性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-24 DOI: 10.1088/1674-1056/ad426d

Guoxiao Xu, Ning Kang, Anle Lei, Huiya Liu, Yao Zhao, Shenlei Zhou, Hong-Hai An, Jun Xiong, Ruirong Wang, Zhi-Yong Xie, Xichen Zhou, Zhi-Heng Fang, Wei Wang

{"title":"Spectral characteristics of laser plasma instabilities with broadband laser","authors":"Guoxiao Xu, Ning Kang, Anle Lei, Huiya Liu, Yao Zhao, Shenlei Zhou, Hong-Hai An, Jun Xiong, Ruirong Wang, Zhi-Yong Xie, Xichen Zhou, Zhi-Heng Fang, Wei Wang","doi":"10.1088/1674-1056/ad426d","DOIUrl":"https://doi.org/10.1088/1674-1056/ad426d","url":null,"abstract":"\u0000 Recent experimental progress regarding broadband laser-plasma instabilities (LPIs) showed that a 0.6% laser bandwidth can reduce backscatters of the stimulated Brillouin scattering (SBS) and the stimulated Raman scattering (SRS) at normal incidence [Phys. Rev. Lett., 132, 035102 (2024)]. In this paper, we present further discussion on the spectral distributions of the scatters developed by broadband LPIs, in addition to a brief validation of the effectiveness of bandwidth on LPIs mitigation at oblique incidence. SBS backscatter has a small redshift in the broadband case contrary to the blueshift with narrowband laser, which may be explained by the self-cross beam energy transfer between the various frequency components within the bandwidth. SRS backscatter spectrum presents a peak at a longer wavelength in the broadband case compared to the short one in the narrowband case, which is possibly attributed to the mitigation effect of bandwidth on filaments at underdense plasmas. The three-halves harmonic emission (3ω/2) has a one-peak spectral distribution under the broadband condition, which is different from the two-peak distribution under the narrowband condition, and that may be related to the spectral mixing of different frequency components within the bandwidth if the main sources of the two are both two-plasmon decay.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140665364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Calculation and prediction of divertor detachment via impurity seeding by using 1D model 利用一维模型计算和预测杂质播种导致的分流器脱落

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-24 DOI: 10.1088/1674-1056/ad426a

Wen-Jie Zhou, Xiao-Ju Liu, Xiao-He Wu, Bang Li, Qi-Qi Shi, Hao-Chen Fan, Yan-Jie Yang, Guo-Qiang Li

{"title":"Calculation and prediction of divertor detachment via impurity seeding by using 1D model","authors":"Wen-Jie Zhou, Xiao-Ju Liu, Xiao-He Wu, Bang Li, Qi-Qi Shi, Hao-Chen Fan, Yan-Jie Yang, Guo-Qiang Li","doi":"10.1088/1674-1056/ad426a","DOIUrl":"https://doi.org/10.1088/1674-1056/ad426a","url":null,"abstract":"\u0000 Achieving the divertor detachment helps to alleviate excessive heat load and sputtering problems on the target plates, thereby prolonging the lifetime of divertor components for fusion devices. In order to provide a rapid but relatively reliable prediction of plasma parameters along the flux tube for future devices design, a one-dimensional (1D) modeling code for the impurity seeded detached divertor operational point has been developed based on the Python language, which is a fluid model based on the previous work.[1] The experimental observation of the onset of divertor detachment by neon (Ne) and argon (Ar) seeding in EAST is well reproduced by using the 1D modeling code. The comparison of the 1D modeling and 2D simulation by SOLPS-ITER code for CFETR detachment operation with Ne and Ar seeding also shows good consistency. The predictions of the radiative power loss and requirement of the corresponding impurity concentration for achieving divertor detachment via different impurity seeding for the high heating power scenarios on EAST and CFETR Phase II by the 1D model are also presented. Based on the predictions, the optimized parameter space for divertor detachment operation on EAST and CFETR has also been determined. Such a simple but reliable 1D model can provide a reasonable parameter inputs for a detailed and accurate analysis by 2D or 3D modeling tools through rapid parameter scanning.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Massive Dirac particles based on gapped graphene with Rosen-Morse potential in a uniform magnetic field 均匀磁场中基于具有罗森-莫尔斯势能的间隙石墨烯的大质量狄拉克粒子

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-24 DOI: 10.1088/1674-1056/ad426b

A. Kalani, Alireza Amani, M. Ramzanpour

{"title":"Massive Dirac particles based on gapped graphene with Rosen-Morse potential in a uniform magnetic field","authors":"A. Kalani, Alireza Amani, M. Ramzanpour","doi":"10.1088/1674-1056/ad426b","DOIUrl":"https://doi.org/10.1088/1674-1056/ad426b","url":null,"abstract":"\u0000 In this paper, we explore the gapped graphene structure in the two-dimensional plane in the presence of the Rosen-Morse potential and the external uniform magnetic field. In order to describe the corresponding structure, we consider the propagation of electrons in graphene as relativistic fermion quasi-particles, and analyze it by the wave functions of two-component spinors with pseudo-spin symmetry using the Dirac equation. Next, to solve and analyze the Dirac equation, we obtain the eigenvalues and eigenvectors using the Legendre differential equation. After that, we obtain the bounded states of energy depending on the coefficients of Rosen-Morse and magnetic potentials in terms of quantum numbers of principal n and spin-orbit k. Then, the values of the energy spectrum for the ground state and the first excited state are calculated, and the wave functions and the corresponding probabilities are plotted in terms of coordinates r. In what follows, we explore the band structure of gapped graphene by the modified dispersion relation and write it in terms of the two-dimensional wave vectors K\u0000 \u0000 x\u0000 and K\u0000 \u0000 y\u0000 . Finally, the energy bands are plotted in terms of the wave vectors K\u0000 \u0000 x\u0000 and K\u0000 \u0000 y\u0000 with and without the magnetic term.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140665797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

K-core attack, equilibrium K-core, and kinetically constrained spin system K 核攻击、平衡 K 核和动力学约束自旋系统

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-24 DOI: 10.1088/1674-1056/ad4329

Hai-Jun Zhou

引用次数: 0

Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries 用于固态锂金属电池的高稳定性掺镓石榴石电解质的缺陷化学工程

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-23 DOI: 10.1088/1674-1056/ad41b9

Sihan Chen, Jun Li, Keke Liu, Xiaochen Sun, Jingwei Wan, Huiyu Zhai, Xinfeng Tang, G. Tan

{"title":"Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries","authors":"Sihan Chen, Jun Li, Keke Liu, Xiaochen Sun, Jingwei Wan, Huiyu Zhai, Xinfeng Tang, G. Tan","doi":"10.1088/1674-1056/ad41b9","DOIUrl":"https://doi.org/10.1088/1674-1056/ad41b9","url":null,"abstract":"\u0000 Ga-doped Li7La3Zr2O12 (Ga-LLZO) has long been considered as a promising garnet-type electrolyte candidate for all-solid-state lithium metal batteries (ASSLBs) due to its high room temperature ionic conductivity. However, the typical synthesis of Ga-LLZO is usually accompanied by the formation of undesired LiGaO2 impurity phase that causes severe instability issue of electrolyte in contact with molten Li metal during half/full cells assembly. In this study, we show that by simply engineering the defect chemistry of Ga-LLZO, namely, the lithium deficiency level, LiGaO2 impurity phase is effectively inhibited in the final synthetic product. Consequently, defect chemistry engineered Ga-LLZO exhibits excellent electrochemical stability against lithium metal, while its high room temperature ionic conductivity (~1.9 × 10-3 S·cm-1) is well reserved. The assembled Li/Ga-LLZO/Li symmetric cell has a superior critical current density of 0.9 mA·cm-2, and cycles stably for 500 hours at a current density of 0.3 mA·cm-2. This research facilitates the potential commercial applications of high performance Ga-LLZO solid electrolyte in ASSLBs.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Magnetic and electrical transport properties in GdAlSi and SmAlGe 钆铝硅（GdAlSi）和钐铝锗（SmAlGe）的磁性和电气传输特性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-23 DOI: 10.1088/1674-1056/ad41ba

Jing Gong, Huan Wang, Xiao Ma, Xiangyu Zeng, Junfa Lin, Kun Han, Yiting Wang, Tianlong Xia

引用次数: 0

First-principles study on stability and superconductivity of ternary hydride LaYH x (x = 2, 3, 6 and 8) 关于三元氢化物 LaYH x（x = 2、3、6 和 8）稳定性和超导性的第一性原理研究

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-23 DOI: 10.1088/1674-1056/ad41b8

Xiao Z Yan, Xing Z Zhou, Chao-Fei Liu, Yin-Li Xu, Yi-Bin Huang, Xiao W Sheng, Yang-Mei Chen

{"title":"First-principles study on stability and superconductivity of ternary hydride LaYH\u0000 x\u0000 (x = 2, 3, 6 and 8)","authors":"Xiao Z Yan, Xing Z Zhou, Chao-Fei Liu, Yin-Li Xu, Yi-Bin Huang, Xiao W Sheng, Yang-Mei Chen","doi":"10.1088/1674-1056/ad41b8","DOIUrl":"https://doi.org/10.1088/1674-1056/ad41b8","url":null,"abstract":"\u0000 Recent studies have shown that the La- and Y-hydrides can exhibit significant superconducting properties under high pressures. In this paper, we investigate the stability, electronic and superconducting properties of LaYH\u0000 x\u0000 (x=2, 3, 6 and 8) under 0-200 GPa. It is found that LaYH2 stablizes in the C2/m phase at ambient pressure, and transforms to the Pmmn phase at 67 GPa. LaYH3 stablizes in the C2/m phase at ambient pressure, and undergoes a phase transition of C2/m→P21/m→R3m at 12 and 87 GPa, respectively. LaYH6 stablizes in the P43212 phase at ambient pressure, and undergoes a phase transition of P43212→P4/mmm→ Cmcm at 28 GPa and 79 GPa, respectively. LaYH8 stablizes in the Imma phase at 60 GPa and transforms to the P4/mmm phase at 117 GPa. Calculations of the electronic band structures show that the P4/mmm-LaYH8 and all phases of LaYH2 and LaYH3 exhibt metallic character. For the metallic phases, we then study their superconducting properties. The calculated superconducting transition temperatures (Tc\u0000 ) are 0.47 K for C2/m-LaYH2 at 0 GPa, 0 K for C2/m-LaYH3 at 0 GPa, and 55.51 K for P4/mmm-LaYH8 at 50 GPa, respectively.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 of a SERF atomic magnetometer based on flat-top light beam 基于平顶光束的 SERF 原子磁强计的性能优化

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-04-18 DOI: 10.1088/1674-1056/ad401b

Ziqi Yuan, Junjian Tang, Shudong Lin, Y. Zhai

引用次数: 0