Matter and Radiation at Extremes最新文献_第9页

Hybrid PIC–fluid simulations for fast electron transport in a silicon target 硅靶中快速电子输运的混合pic -流体模拟

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-01 DOI: 10.1063/5.0137973

引用次数: 0

Laser peeler regime of high-harmonic generation for diagnostics of high-power focused laser pulses 用于诊断高功率聚焦激光脉冲的高谐波激光削皮机制

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-01 DOI: 10.1063/5.0142051

S. Perevalov, A. Pukhov, M. Starodubtsev, A. Soloviev

引用次数: 0

Effects of electron heating and surface rippling on Rayleigh–Taylor instability in radiation pressure acceleration 电子加热和表面波纹对辐射压力加速中瑞利-泰勒不稳定性的影响

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-01 DOI: 10.1063/5.0130513

X. Z. Wu, Y. Shou, Z. B. Guo, H. G. Lu, J. Liu, Di Wu, Z. Gong, X. Yan

{"title":"Effects of electron heating and surface rippling on Rayleigh–Taylor instability in radiation pressure acceleration","authors":"X. Z. Wu, Y. Shou, Z. B. Guo, H. G. Lu, J. Liu, Di Wu, Z. Gong, X. Yan","doi":"10.1063/5.0130513","DOIUrl":"https://doi.org/10.1063/5.0130513","url":null,"abstract":"The acceleration of ultrathin targets driven by intense laser pulses induces Rayleigh–Taylor-like instability. Apart from laser and target configurations, we find that electron heating and surface rippling, effects inherent to the interaction process, have an important role in instability evolution and growth. By employing a simple analytical model and two-dimensional particle-in-cell simulations, we show that the onset of electron heating in the early stage of the acceleration suppresses the growth of small-scale modes, but it has little influence on the growth of large-scale modes, which thus become dominant. With the growth of surface ripples, a mechanism that can significantly influence the growth of these large-scale modes is found. The laser field modulation caused by surface rippling generates an oscillatory ponderomotive force, directly modulating transverse electron density at a faster growth rate than that of ions and eventually enhancing instability growth. Our results show that when surface deformation becomes obvious, electron surface oscillation at 2 ω0 (where ω0 is the laser frequency) is excited simultaneously, which can be seen as a signature of this mechanism.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"13 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85128742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Estimation of plasma parameters of X-pinch with time-resolved x-ray spectroscopy 用时间分辨x射线光谱学估计x-捏缩等离子体参数

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-05-01 DOI: 10.1063/5.0131369

S. Ham, J. Ryu, Hakmin Lee, Sungbin Park, Y. Ghim, Y. Hwang, K. Chung

{"title":"Estimation of plasma parameters of X-pinch with time-resolved x-ray spectroscopy","authors":"S. Ham, J. Ryu, Hakmin Lee, Sungbin Park, Y. Ghim, Y. Hwang, K. Chung","doi":"10.1063/5.0131369","DOIUrl":"https://doi.org/10.1063/5.0131369","url":null,"abstract":"We estimate the parameters of a Cu plasma generated by an X-pinch by comparing experimentally measured x-rays with synthetic data. A filtered absolute extreme ultraviolet diode array is used to measure time-resolved x-ray spectra with a spectral resolution of ∼1 keV in the energy range of 1–10 keV. The synthetic spectra of Cu plasmas with different electron temperatures, electron densities, and fast electron fractions are calculated using the FLYCHK code. For quantitative comparison with the measured spectrum, two x-ray power ratios with three different spectral ranges are calculated. We observe three x-ray bursts in X-pinch experiments with two Cu wires conducted on the SNU X-pinch at a current rise rate of ∼0.2 kA/ns. Analysis of the spectra reveals that the first burst comprises x-rays emitted by hot spots and electron beams, with characteristics similar to those observed in other X-pinches. The second and third bursts are both generated by long-lived electron beams formed after the neck structure has been completely depleted. In the second burst, the formation of the electron beam is accompanied by an increase in the electron density of the background plasma. Therefore, the long-lived electron beams generate the additional strong x-ray bursts while maintaining a plasma channel in the central region of the X-pinch. Moreover, they emit many hard x-rays (HXRs), enabling the SNU X-pinch to be used as an HXR source. This study confirms that the generation of long-lived electron beams is crucial to the dynamics of X-pinches and the generation of strong HXRs.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"70 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85534088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 2

Cerium-promoted conversion of dinitrogen into high-energy-density material CeN6 under moderate pressure 铈促进二氮在中压下转化为高能量密度材料CeN6

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-04-20 DOI: 10.1063/5.0136443

Yuan-ming Wang, Zhihui Li, Shifeng Niu, Wen-cai Yi, Shuang Liu, Zhen Yao, Bingbing Liu

{"title":"Cerium-promoted conversion of dinitrogen into high-energy-density material CeN6 under moderate pressure","authors":"Yuan-ming Wang, Zhihui Li, Shifeng Niu, Wen-cai Yi, Shuang Liu, Zhen Yao, Bingbing Liu","doi":"10.1063/5.0136443","DOIUrl":"https://doi.org/10.1063/5.0136443","url":null,"abstract":"Synthesis pressure and structural stability are two crucial factors for highly energetic materials, and recent investigations have indicated that cerium is an efficient catalyst for N2 reduction reactions. Here, we systematically explore Ce–N compounds through first-principles calculations, demonstrating that the cerium atom can weaken the strength of the N≡N bond and that a rich variety of cerium polynitrides can be formed under moderate pressure. Significantly, P1̄-CeN6 possesses the lowest synthesis pressure of 32 GPa among layered metal polynitrides owing to the strong ligand effect of cerium. The layered structure of P1̄-CeN6 proposed here consists of novel N14 ring. To clarify the formation mechanism of P1̄-CeN6, the reaction path Ce + 3N2 → trans-CeN6 → P1̄-CeN6 is proposed. In addition, P1̄-CeN6 possesses high hardness (20.73 GPa) and can be quenched to ambient conditions. Charge transfer between cerium atoms and N14 rings plays a crucial role in structural stability. Furthermore, the volumetric energy density (11.20 kJ/cm3) of P1̄-CeN6 is much larger than that of TNT (7.05 kJ/cm3), and its detonation pressure (128.95 GPa) and detonation velocity (13.60 km/s) are respectively about seven times and twice those of TNT, and it is therefore a promising high-energy-density material.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"55 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83156645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 2

First-principles study on the conventional superconductivity of N-doped fcc-LuH3 n掺杂fcc-LuH3常规超导的第一性原理研究

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-03-22 DOI: 10.1063/5.0151844

Z. Huo, D. Duan, Tengyu Ma, Qiwen Jiang, Zihan Zhang, Decheng An, F. Tian, T. Cui

引用次数: 16

Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses 控制跃迁到不同的质子加速体制:由圆极化少周期脉冲驱动的近临界密度等离子体

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-03-21 DOI: 10.1063/5.0151751

Shivani Choudhary De Marco, S. Mondal, D. Margarone, S. Kahaly

{"title":"Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses","authors":"Shivani Choudhary De Marco, S. Mondal, D. Margarone, S. Kahaly","doi":"10.1063/5.0151751","DOIUrl":"https://doi.org/10.1063/5.0151751","url":null,"abstract":"A controlled transition between two different ion acceleration mechanisms would pave the way to achieving different ion energies and spectral features within the same experimental set up, depending on the region of operation. Based on numerical simulations conducted over a wide range of experimentally achievable parameter space, reported here is a comprehensive investigation of the different facets of ion acceleration by relativistically intense circularly polarized laser pulses interacting with thin near-critical-density plasma targets. The results show that the plasma thickness, exponential density gradient, and laser frequency chirp can be controlled to switch the interaction from the transparent operating regime to the opaque one, thereby enabling the choice of a Maxwellian-like ion energy distribution with a cutoff energy in the relativistically transparent regime or a quasi-monoenergetic spectrum in the opaque regime. Next, it is established that a multispecies target configuration can be used effectively for optimal generation of quasi-monoenergetic ion bunches of a desired species. Finally, the feasibility is demonstrated for generating monoenergetic proton beams with energy peak at E≈20–40 MeV and a narrow energy spread of ΔE/E≈18%–28.6% confined within a divergence angle of ∼175 mrad at a reasonable laser peak intensity of I0 ≃ 5.4 × 1020 W/cm2.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"10 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86534597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 1

Theoretical model of radiation heat wave in two-dimensional cylinder with sleeve 带套筒的二维圆柱体辐射热波的理论模型

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-03-01 DOI: 10.1063/5.0119240

Cheng-Jian Xiao, Guang-Wei Meng, Yingkui Zhao

引用次数: 0

Corrigendum to: “Spectrum-tailored random fiber laser towards ICF laser facility” [Matter and Radiation at Extremes 8, 025902 (2023)] “面向ICF激光设施的频谱定制随机光纤激光器”的勘误表[极端物质与辐射8,025902 (2023)]

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-03-01 DOI: 10.1063/5.0145795

M. Fan, Shengtao Lin, K. Yao, Yifei Qi, Jiaojiao Zhang, Junwen Zheng, Pan Wang, Longqun Ni, X. Bao, D. Zhou, Bo Zhang, Kaibo Xiao, H. Xia, Rui Zhang, Ping Li, Wanguo Zheng, Zi-nan Wang

引用次数: 0

Spectrum-tailored random fiber laser towards ICF laser facility 面向ICF激光设备的频谱定制型随机光纤激光器

IF 5.1 1区物理与天体物理

Matter and Radiation at Extremes Pub Date : 2023-03-01 DOI: 10.1063/5.0129434

M. Fan, Shengtao Lin, K. Yao, Yifei Qi, Jiaojiao Zhang, Junwen Zheng, Pan Wang, Longqun Ni, X. Bao, D. Zhou, Bo Zhang, Kaibo Xiao, H. Xia, Rui Zhang, Ping Li, Wanguo Zheng, Zi-nan Wang

{"title":"Spectrum-tailored random fiber laser towards ICF laser facility","authors":"M. Fan, Shengtao Lin, K. Yao, Yifei Qi, Jiaojiao Zhang, Junwen Zheng, Pan Wang, Longqun Ni, X. Bao, D. Zhou, Bo Zhang, Kaibo Xiao, H. Xia, Rui Zhang, Ping Li, Wanguo Zheng, Zi-nan Wang","doi":"10.1063/5.0129434","DOIUrl":"https://doi.org/10.1063/5.0129434","url":null,"abstract":"Broadband low-coherence light is considered to be an effective way to suppress laser plasma instability. Recent studies have demonstrated the ability of low-coherence laser facilities to reduce back-scattering during beam–target coupling. However, to ensure simultaneous low coherence and high energy, complex spectral modulation methods and amplification routes have to be adopted. In this work, we propose the use of a random fiber laser (RFL) as the seed source. The spectral features of this RFL can be carefully tailored to provide a good match with the gain characteristics of the laser amplification medium, thus enabling efficient amplification while maintaining low coherence. First, a theoretical model is constructed to give a comprehensive description of the output characteristics of the spectrum-tailored RFL, after which the designed RFL is experimentally realized as a seed source. Through precise pulse shaping and efficient regenerative amplification, a shaped random laser pulse output of 28 mJ is obtained, which is the first random laser system with megawatt-class peak power that is able to achieve low coherence and efficient spectrum-conformal regenerative amplification.","PeriodicalId":54221,"journal":{"name":"Matter and Radiation at Extremes","volume":"36 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72577123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 5