High Energy Density Physics最新文献_第10页

Withdrawal notice to shock wave implosion in water 水中冲击波内爆撤离通知

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101025

G Chefranov, Ya.E Krasik, A Rososhek

引用次数: 0

The uniform electron gas at high temperatures: ab initio path integral Monte Carlo simulations and analytical theory 高温下的均匀电子气体:从头算路径积分蒙特卡罗模拟和分析理论

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101015

Tobias Dornheim , Jan Vorberger , Zhandos Moldabekov , Gerd Röpke , Wolf-Dietrich Kraeft

{"title":"The uniform electron gas at high temperatures: ab initio path integral Monte Carlo simulations and analytical theory","authors":"Tobias Dornheim , Jan Vorberger , Zhandos Moldabekov , Gerd Röpke , Wolf-Dietrich Kraeft","doi":"10.1016/j.hedp.2022.101015","DOIUrl":"10.1016/j.hedp.2022.101015","url":null,"abstract":"<div><p>We present extensive new <em>Ab initio</em> path integral Monte Carlo (PIMC) simulations of the uniform electron gas (UEG) in the high-temperature regime, <span><math><mrow><mn>8</mn><mo>≤</mo><mi>θ</mi><mo>=</mo><msub><mrow><mi>k</mi></mrow><mrow><mi>B</mi></mrow></msub><mi>T</mi><mo>/</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub><mo>≤</mo><mn>128</mn></mrow></math></span>. This allows us to study the convergence of different properties towards the classical limit. In particular, we investigate the classical relation between the static structure factor <span><math><mrow><mi>S</mi><mrow><mo>(</mo><mi>q</mi><mo>)</mo></mrow></mrow></math></span> and the static local field correction <span><math><mrow><mi>G</mi><mrow><mo>(</mo><mi>q</mi><mo>)</mo></mrow></mrow></math></span>, which is only fulfilled at low densities. Moreover, we compare our new results for the interaction energy to the parametrization of the UEG by Groth et al. (2017), which interpolates between PIMC results for <span><math><mrow><mi>θ</mi><mo>≤</mo><mn>8</mn></mrow></math></span> and the Debye–Hückel limit, and to higher order analytical virial expansions. Finally, we consider the momentum distribution function <span><math><mrow><mi>n</mi><mrow><mo>(</mo><mi>q</mi><mo>)</mo></mrow></mrow></math></span> and find an interaction-induced increase in the occupation of the zero-momentum state even for <span><math><mrow><mi>θ</mi><mo>≳</mo><mn>32</mn></mrow></math></span>. All PIMC data are freely available online, and can be used as input for improved parametrizations and as a rigorous benchmark for approximate methods.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"45 ","pages":"Article 101015"},"PeriodicalIF":1.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181822000386/pdfft?md5=6bc422f009d1e4c8c547ab2d229f3ecc&pid=1-s2.0-S1574181822000386-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82478581","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: 12

Optimising point source irradiation of a capsule for maximum uniformity 优化胶囊的点源照射以获得最大的均匀性

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101007

Oliver Breach , Peter Hatfield , Steven Rose

{"title":"Optimising point source irradiation of a capsule for maximum uniformity","authors":"Oliver Breach , Peter Hatfield , Steven Rose","doi":"10.1016/j.hedp.2022.101007","DOIUrl":"https://doi.org/10.1016/j.hedp.2022.101007","url":null,"abstract":"<div><p><span>Inertial Confinement Fusion involves the implosion of a spherical capsule containing thermonuclear fuel. The implosion is driven by irradiating the outside of the capsule by X-rays or by optical laser irradiation, where in each case the highest uniformity of irradiation is sought. In this paper we consider the theoretical problem of irradiation of a capsule by point sources of X-rays, and seek configurations which maximise uniformity. By studying the root-mean-square deviation in terms of different order harmonic modes, we rationalise the dependence of uniformity on distance </span><span><math><mi>d</mi></math></span> of the point sources from the centre of a capsule. After investigating simple configurations based on the Platonic solids, we use a global optimisation algorithm (basin-hopping) to seek better arrangements. The optimum configurations are found to depend strongly on <span><math><mi>d</mi></math></span>; at certain values which minimise nonuniformity, these involve grouping of sources on the vertices of octahedra or icosahedra, which we explain using a modal decomposition. The effect of uncertainties in both position and intensity is studied, and lastly we investigate the illumination of a capsule whose radius is changing with time.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"45 ","pages":"Article 101007"},"PeriodicalIF":1.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136581116","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

Note on similarity transform and shock waves 注意相似变换和冲击波

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101020

Chu A. Kwang-Hua

引用次数: 0

WITHDRAWN: Shock wave implosion in water 撤回:水中冲击波内爆

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101017

S.G. Chefranov, Ya.E. Krasik, A. Rososhek

引用次数: 0

Time-dependent modeling of photoionization wave propagation in nitrogen 氮中光电离波传播的时间依赖模型

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.100999

Zohar Henis, David Salzmann

引用次数: 0

Simulation of non-stationary neon plasma using the THERMOS toolkit 使用THERMOS工具箱模拟非静止氖等离子体

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101018

D.A. Kim, I.Yu. Vichev, A.D. Solomyannaya, A.S. Grushin

引用次数: 0

A fast approximation to supershell partition functions 超壳层配分函数的快速逼近

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-12-01 DOI: 10.1016/j.hedp.2022.101016

Brian G. Wilson , Jean-Christophe Pain

引用次数: 1

Time-dependent subsonic ablation pressure scalings for soft X-ray heated low- and intermediate-Z materials at drive temperatures of up to 400 eV 在高达400 eV的驱动温度下，软x射线加热低z和中z材料的时间相关亚音速烧蚀压力刻度

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-09-01 DOI: 10.1016/j.hedp.2022.100995

William Trickey, Jamie Walsh, John Pasley

{"title":"Time-dependent subsonic ablation pressure scalings for soft X-ray heated low- and intermediate-Z materials at drive temperatures of up to 400 eV","authors":"William Trickey, Jamie Walsh, John Pasley","doi":"10.1016/j.hedp.2022.100995","DOIUrl":"10.1016/j.hedp.2022.100995","url":null,"abstract":"<div><p>The soft X-ray driven subsonic ablation of five different materials with atomic numbers ranging from 3.5 to 22 is investigated for radiation drive temperatures of up to 400eV. Simulations were performed using the one-dimensional radiation hydrodynamics simulation code HYADES. For each material, ablation pressure scaling-laws are determined as a function of drive radiation-temperature and time, assuming that the irradiation lasts for a period of a few nanoseconds and that the drive temperature remains constant during this period. For all the materials, the maximum drive-temperature for subsonic operation is identified. As expected, lower-Z materials demonstrate a stronger scaling of ablation pressure with radiation temperature and a more gradual fall off with time. However, the lowest-Z materials transition to trans- and super-sonic ablation at temperatures of only a few hundred eV.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"44 ","pages":"Article 100995"},"PeriodicalIF":1.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181822000209/pdfft?md5=0525f4a083fcc937b86d94b3d51d85e9&pid=1-s2.0-S1574181822000209-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54448251","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: 1

X-ray diffraction measurements of ramp-compressed tin 斜压锡的x射线衍射测量

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2022-06-01 DOI: 10.1016/j.hedp.2022.100996

EKR Floyd, JM Foster, P Graham, SD Rothman, DR McGonegle, R Penman, JG Turner

引用次数: 0