High Energy Density Physics最新文献_第8页

Krypton Heβ line spectrum including n = 2, 3 Li-like satellites with detailed Stark broadened line shapes 氪 Heβ 线光谱，包括 n=2,3 个类锂卫星和详细的斯塔克展宽线形

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-02-01 DOI: 10.1016/j.hedp.2024.101081

{"title":"Krypton Heβ line spectrum including n = 2, 3 Li-like satellites with detailed Stark broadened line shapes","authors":"","doi":"10.1016/j.hedp.2024.101081","DOIUrl":"10.1016/j.hedp.2024.101081","url":null,"abstract":"<div>We discuss the krypton He<math><mi>β</mi></math> line spectrum including Li-like satellites with a spectator electron in n = 2 and n = 3 and detailed line shapes computed using standard Stark broadening theory for hot dense plasma conditions relevant to X-ray tracer spectroscopy of inertial confinement fusion implosion cores. The results show that the interference term in the electron broadening does not produce a significant effect for these satellite transitions. However, the effect of the electric field mixing of the energy levels driven by the ion’s microfield distribution does produce a significant change in the line shape. Level populations calculated with a collisional radiative atomic kinetics model were employed to obtain the photon energy resolved emissivity and opacity using the Stark line shapes, and the emergent intensity distribution was calculated by integrating the radiation transport equation along chords assuming a uniform spherical plasma source. The line spectrum has electron temperature (<math><msub><mrow><mi>T</mi></mrow><mrow><mi>e</mi></mrow></msub></math>) and density (<math><msub><mrow><mi>n</mi></mrow><mrow><mi>e</mi></mrow></msub></math>) sensitivity due to the temperature and density dependence of level populations and the density dependence of the Stark line shapes. Hence, this spectrum is suitable for a simultaneous temperature and density plasma diagnostic of implosion cores.</div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101081"},"PeriodicalIF":1.6,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139658515","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

Classical Molecular dynamic codes for hot dense plasmas: The BinGo code suite 用于热致密等离子体的经典分子动力学代码：BinGo 代码套件

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-02-01 DOI: 10.1016/j.hedp.2024.101084

A. Calisti, S. Ferri, C. Mossé, B. Talin

引用次数: 0

A note on efficiently generating ionic configurations for opacity calculations 关于为不透明度计算有效生成离子构型的说明

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-01-23 DOI: 10.1016/j.hedp.2024.101079

Daniel Aberg, Paul Grabowski, Michael Kruse, Brian G. Wilson

引用次数: 0

Machine learning assisted bayesian inference of mix and hot-spot conditions in NIF implosions 机器学习辅助贝叶斯推断 NIF 内爆的混合和热点条件。

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-01-22 DOI: 10.1016/j.hedp.2024.101077

B.A. Hammel, B.D. Hammel, H.A. Scott, J. Luc Peterson

引用次数: 0

Comparison of second-order spectral line widths formulae 二阶光谱线宽公式的比较

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-01-18 DOI: 10.1016/j.hedp.2024.101080

Carlos A. Iglesias , Thomas A. Gomez

引用次数: 0

Toward constraint of ionization-potential depression models in a convergent geometry 收敛几何中电离电位抑制模型的制约

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-01-03 DOI: 10.1016/j.hedp.2024.101076

D.T. Bishel , P.M. Nilson , D.A. Chin , J.J. Ruby , E. Smith , S.X. Hu , R. Epstein , I.E. Golovkin , J.R. Rygg , G.W. Collins

{"title":"Toward constraint of ionization-potential depression models in a convergent geometry","authors":"D.T. Bishel , P.M. Nilson , D.A. Chin , J.J. Ruby , E. Smith , S.X. Hu , R. Epstein , I.E. Golovkin , J.R. Rygg , G.W. Collins","doi":"10.1016/j.hedp.2024.101076","DOIUrl":"10.1016/j.hedp.2024.101076","url":null,"abstract":"<div>We demonstrate the value of inner-shell X-ray absorption spectroscopy for dense-plasma atomic physics and explore the coupling between constraint of the thermodynamic state and constraint of ionization-potential depression models. Synthetic K-shell absorption spectra are generated along a radius from a point-like core and analyzed using different ionization-potential depression models. Within this synthetic analysis framework, we identify plasma conditions (<math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>e</mi></mrow></msub><mo>=</mo><mn>400</mn></mrow></math> eV, <math><mrow><mi>ρ</mi><mo>=</mo><mn>40</mn></mrow></math> g/cm<math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math>) accessible by spherical implosions where K-shell absorption spectra discriminate between models if the material temperature is measured to a precision of 20%. The analysis is extensible to a finite-sized core and can be used to guide future studies of ionization-potential depression, informing material and radiative properties of matter in fusion plasmas and stellar interiors.</div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"50 ","pages":"Article 101076"},"PeriodicalIF":1.6,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181824000016/pdfft?md5=3638bbcfcaddbd90bd36b1e25905472a&pid=1-s2.0-S1574181824000016-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139102391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The STAG code: A fully relativistic super transition array calculation using Green’s functions STAG 代码：使用格林函数的全相对论超转变阵列计算

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-01-02 DOI: 10.1016/j.hedp.2024.101078

N.M. Gill, C.J. Fontes, C.E. Starrett

引用次数: 0

Observations of multi-ion physics and kinetic effects in a surrogate to the solar CNO reactions 太阳CNO反应替代物中多离子物理和动力学效应的观测

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2023-12-01 DOI: 10.1016/j.hedp.2023.101066

J. Jeet , A.B. Zylstra , M. Gatu Johnson , N.V. Kabadi , P. Adrian , C. Forrest , V. Glebov

{"title":"Observations of multi-ion physics and kinetic effects in a surrogate to the solar CNO reactions","authors":"J. Jeet , A.B. Zylstra , M. Gatu Johnson , N.V. Kabadi , P. Adrian , C. Forrest , V. Glebov","doi":"10.1016/j.hedp.2023.101066","DOIUrl":"10.1016/j.hedp.2023.101066","url":null,"abstract":"<div>The ‘CNO process’ occurs in heavier stars with finite metallicity in which hydrogen burning is catalyzed in the presence of 12C. These reactions are more strongly dependent on temperature than the pp cycle reactions, and thus the CNO cycle dominates only in massive stars. For these types of reactions to be studied at ICF facilities such as OMEGA, an implosion platform using heavier nuclei in the fuel and capable of creating ion temperatures on the order of at least 20 keV is required. A potential route to reach these conditions is to take advantage of kinetic effects in low-convergence shock-driven ‘exploding pusher’ implosions. In this experiment, shots were conducted at the OMEGA laser facility using the surrogate reaction 13C + D. Its cross section is substantially higher than the actual astrophysical CNO reactions. The yield of this reaction in these implosions was much lower than expected. Physical explanations are discussed, with significant species stratification the likely explanation.</div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"49 ","pages":"Article 101066"},"PeriodicalIF":1.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135656063","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

Quantitative proton radiography and shadowgraphy for arbitrary intensities 任意强度的定量质子射线照相和阴影照相

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2023-12-01 DOI: 10.1016/j.hedp.2023.101067

J.R. Davies , P.V. Heuer , A.F.A. Bott

{"title":"Quantitative proton radiography and shadowgraphy for arbitrary intensities","authors":"J.R. Davies , P.V. Heuer , A.F.A. Bott","doi":"10.1016/j.hedp.2023.101067","DOIUrl":"10.1016/j.hedp.2023.101067","url":null,"abstract":"<div>Charged-particle radiography and shadowgraphy data can be directly inverted to obtain a line-integrated transverse Lorentz force or a line-integrated transverse refractive index gradient if intensity modulations due to scattering and absorption are negligible, and angular deflections are small. We develop a new direct-inversion algorithm based on plasma physics and compare it to a new Monge–Ampère code and an existing power diagram code (Kasim et al., 2017). The measured or source intensity is represented by electrons subject to drag, and the other intensity by fixed ions. The decrease in kinetic plus electrostatic energy determines convergence. The displacement of the electrons from their initial to their equilibrium positions determines the line-integrated force or refractive index gradient. We have implemented two approaches: PIC (particle in cell) and Lagrangian fluid, in 1-D and 2-D. The PIC code works for arbitrary intensities, can work efficiently in parallel, and can make use of existing codes. The Lagrangian code requires less memory and is faster than the PIC code without massively parallel processing, but fails in 2-D for large intensity modulations. The Monge–Ampère code is by far the fastest in 2-D, without massively parallel processing, but fails for intensities with large voids, high contrast ratios and large deflections across the boundaries, and could not obtain the degree of convergence possible with the PIC code. The power diagram code was by far the slowest and most memory intensive, and failed for large peaks in the measured intensity.</div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"49 ","pages":"Article 101067"},"PeriodicalIF":1.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135760588","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: 1

Optical depth measurement of self-reversed line emitted from in-homogenous plasma in laser induced breakdown spectroscopy 激光诱导击穿光谱中非均匀等离子体发射自反转线的光学深度测量

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2023-12-01 DOI: 10.1016/j.hedp.2023.101069

Jalloul Trabelsi, Mounir Esboui, Neïla Terzi

引用次数: 0