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Stimulated Raman side and backscatter instabilities of crossed laser beams in plasma 等离子体中交叉激光束的受激拉曼侧和后向散射不稳定性
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-09-01 DOI: 10.1016/j.hedp.2023.101054
Vijay Singh , Benatus Norbert Mvile , Anoop Kumar Pandey
{"title":"Stimulated Raman side and backscatter instabilities of crossed laser beams in plasma","authors":"Vijay Singh ,&nbsp;Benatus Norbert Mvile ,&nbsp;Anoop Kumar Pandey","doi":"10.1016/j.hedp.2023.101054","DOIUrl":"10.1016/j.hedp.2023.101054","url":null,"abstract":"<div><p><span>Stimulated Raman scattering (SRS) instability due to two nonlinearly coupled </span>laser beams<span> propagating in homogeneous, thermal plasma is analyzed. The temporal evolution equations for pump, scattered and Langmuir waves excited due to the interaction are set up. Using numerical techniques temporal evolution of amplitudes of pump, scattered and resultant Langmuir waves for side and back SRS instabilities have been obtained in the non-relativistic regime. The temporal growth rate, saturation time and saturation amplitude of waves excited by two crossed (perpendicular) lasers are studied and compared with the single beam case. The model considers pump depletion to be the dominant saturation mechanism. The study points towards a new concept for generation of high amplitude Langmuir waves.</span></p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"48 ","pages":"Article 101054"},"PeriodicalIF":1.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49172377","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
SpK: A fast atomic and microphysics code for the high-energy-density regime SpK：用于高能量密度区域的快速原子和微物理代码
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-09-01 DOI: 10.1016/j.hedp.2023.101053
A.J. Crilly , N.P.L. Niasse , A.R. Fraser , D.A. Chapman , K.W. McLean , S.J. Rose , J.P. Chittenden
{"title":"SpK: A fast atomic and microphysics code for the high-energy-density regime","authors":"A.J. Crilly ,&nbsp;N.P.L. Niasse ,&nbsp;A.R. Fraser ,&nbsp;D.A. Chapman ,&nbsp;K.W. McLean ,&nbsp;S.J. Rose ,&nbsp;J.P. Chittenden","doi":"10.1016/j.hedp.2023.101053","DOIUrl":"10.1016/j.hedp.2023.101053","url":null,"abstract":"<div><p>SpK is part of the numerical codebase at Imperial College London used to model high energy density physics (HEDP) experiments. SpK is an efficient atomic and microphysics code used to perform detailed configuration accounting calculations of electronic and ionic stage populations, opacities and emissivities for use in post-processing and radiation hydrodynamics simulations. This is done using screened hydrogenic atomic data supplemented by the NIST energy level database. An extended Saha model solves for chemical equilibrium with extensions for non-ideal physics, such as ionisation potential depression, and non thermal equilibrium corrections. A tree-heap (treap) data structure is used to store spectral data, such as opacity, which is dynamic thus allowing easy insertion of points around spectral lines without a-priori knowledge of the ion stage populations. Results from SpK are compared to other codes and descriptions of radiation transport solutions which use SpK data are given. The treap data structure and SpK’s computational efficiency allows inline post-processing of 3D hydrodynamics simulations with a dynamically evolving spectrum stored in a treap.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"48 ","pages":"Article 101053"},"PeriodicalIF":1.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42070590","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: 3
On the transient spatial localization model 关于瞬态空间局部化模型
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-06-01 DOI: 10.1016/j.hedp.2023.101043
Carlos A. Iglesias
{"title":"On the transient spatial localization model","authors":"Carlos A. Iglesias","doi":"10.1016/j.hedp.2023.101043","DOIUrl":"10.1016/j.hedp.2023.101043","url":null,"abstract":"<div><p><span>Significant discrepancies relevant to helioseismology<span> between experimental and theoretical photon absorption by plasmas remain unresolved. Interestingly, a new process called transient spatial localization (TSL), where the plasma perturbs the final states in photon ionization processes, ostensibly enhances cross-sections resolving the extant discrepancies. The TSL model, however, is shown to involve </span></span><em>ad hoc</em> formulas not derived from fundamental principles and systematic approximations. In addition, a variant of the TSL model, which claimed to enhance electron collisional ionization, is inconsistent with the Schrodinger equation and fails to reproduce known results.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"47 ","pages":"Article 101043"},"PeriodicalIF":1.6,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41452291","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
Schrödinger equation on a generic radial grid 在一般径向网格上的Schrödinger方程
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-06-01 DOI: 10.1016/j.hedp.2023.101042
Christopher Bowen , Jean-Christophe Pain
{"title":"Schrödinger equation on a generic radial grid","authors":"Christopher Bowen ,&nbsp;Jean-Christophe Pain","doi":"10.1016/j.hedp.2023.101042","DOIUrl":"10.1016/j.hedp.2023.101042","url":null,"abstract":"<div><p>In this note, we discuss the choice of radial grid in the numerical resolution of the Schrödinger equation. We detail the transformation of the equation resulting from a change of variable and function for a generic radial grid, using either the explicit or implicit form of the relation describing the change of variable, and apply it to the <span><math><mrow><mi>a</mi><mspace></mspace><mi>r</mi><mo>+</mo><mi>b</mi><mspace></mspace><mo>ln</mo><mrow><mo>(</mo><mi>r</mi><mo>)</mo></mrow></mrow></math></span> log-linear mesh. It is shown that, in the former case, the first three derivatives of the Lambert <span><math><mi>W</mi></math></span> function are required. This complication becomes unnecessary if we adopt the implicit relation instead.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"47 ","pages":"Article 101042"},"PeriodicalIF":1.6,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41475971","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
Atomic structure considerations for the low-temperature opacity of Xenon 氙低温不透明度的原子结构考虑
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2022.101034
A.J. Neukirch, J. Colgan
{"title":"Atomic structure considerations for the low-temperature opacity of Xenon","authors":"A.J. Neukirch,&nbsp;J. Colgan","doi":"10.1016/j.hedp.2022.101034","DOIUrl":"https://doi.org/10.1016/j.hedp.2022.101034","url":null,"abstract":"<div><p>We have begun a preliminary investigation into the opacity of Xe at low temperatures (&lt;50 eV). The emissivity and opacity of Xe is a crucial factor in determining the utility of Xe in EUV lithography, with numerous industrial applications. To this end, we have been exploring the accuracy of some approximations used in opacity models for the relevant ion stages of Xe (6 times ionized through 20 times ionized). Due to the complexity of Xe atomic structure, one needs to use full configuration-interaction to properly describe the strong mixing in the various n=4 sub-shells that give rise to the Δn=0 and Δn=1 transitions that dominate the opacity spectrum at low temperatures. Since calculations that include full configuration-interaction for large numbers of configurations quickly become computationally prohibitive, we have explored hybrid calculations, in which full configuration-interaction is retained for the most important transitions, while intermediate coupling is employed for all other transitions. After verifying atomic structure properties, local-thermodynamic-equilibrium (LTE) opacities are generated using the ATOMIC code at selected temperatures and densities and compared to various experimental results.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"46 ","pages":"Article 101034"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864908","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
Screening and relativistic effects on the stark broadening of hydrogenic ion lines in a plasma 等离子体中氢离子谱线明显展宽的筛选和相对论效应
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2023.101035
D.E. Zenkhri, M.T. Meftah, F. Khelfaoui
{"title":"Screening and relativistic effects on the stark broadening of hydrogenic ion lines in a plasma","authors":"D.E. Zenkhri,&nbsp;M.T. Meftah,&nbsp;F. Khelfaoui","doi":"10.1016/j.hedp.2023.101035","DOIUrl":"https://doi.org/10.1016/j.hedp.2023.101035","url":null,"abstract":"<div><p><span>In the present work, we compute the amplitude of the real part of the electronic collision operator for the electron broadening of hydrogenic ion lines in plasmas, taking into account the screening effects (the interaction between the free electron (perturber) and the ion (emitter) is governed by Debye potential) and </span>relativistic effects in the dynamics of the perturbing electron. The screening effects are included using the cross section calculated by Debye potential instead of Rutherford cross section and the relativistic effects are included by the modification of the velocity distribution (Maxwell–Jûttner) instead of (Maxwell–Boltzmann) distribution and relativistic mass (mass depend on the velocity). The obtained results are compared with Griem’s theoretical work.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"46 ","pages":"Article 101035"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864909","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
Screening and relativistic effects on the stark broadening of hydrogenic ion lines in a plasma 等离子体中氢离子谱线明显展宽的筛选和相对论效应
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2023.101035
D. E. Zenkhri, M. T. Meftah, F. Khelfaoui
{"title":"Screening and relativistic effects on the stark broadening of hydrogenic ion lines in a plasma","authors":"D. E. Zenkhri, M. T. Meftah, F. Khelfaoui","doi":"10.1016/j.hedp.2023.101035","DOIUrl":"https://doi.org/10.1016/j.hedp.2023.101035","url":null,"abstract":"","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"70 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54448265","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
Non-equilibrium dissociation rate coefficient of O2+O2 collision at high temperatures 高温下O2+O2碰撞的非平衡解离速率系数
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2022.101026
Huanhuan Zhang , Hong Zhang , XinLu Cheng
{"title":"Non-equilibrium dissociation rate coefficient of O2+O2 collision at high temperatures","authors":"Huanhuan Zhang ,&nbsp;Hong Zhang ,&nbsp;XinLu Cheng","doi":"10.1016/j.hedp.2022.101026","DOIUrl":"10.1016/j.hedp.2022.101026","url":null,"abstract":"<div><p>We focus on the collision dissociation process of O<sub>2</sub>+O<sub>2</sub>→O+O+O<sub>2</sub> at high temperatures (8000 K–30000 K). The research method is the new general non-equilibrium dynamics model proposed by Singh et al. The model parameters are determined by calculating the dissociation probability under the specific vibrational energy and the energy distribution functions in the quasi-steady state (QSS). It is found that the dissociation rate is more easily at high vibrational energy levels. Moreover, the energy distribution function deviates from the Boltzmann distribution in the QSS state. We obtain the dissociation rate coefficients at high temperatures by integrating the dissociation probability and the internal energy distribution functions (the Boltzmann distribution, the QSS state distribution, and the non-Boltzmann distribution). Our results demonstrate that the rate coefficients depend on the vibrational temperature and more strongly at a lower translational temperature.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"46 ","pages":"Article 101026"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42418281","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
Corrigendum to ultrafast anisotropic disordering in graphite driven by intense hard X-ray pulses 强硬X射线脉冲驱动石墨中的超快各向异性无序更正
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2022.101022
N.J. Hartley , J. Grenzer , W. Lu , L.G. Huang , Y. Inubushi , N. Kamimura , K. Katagiri , R. Kodama , A. Kon , V. Lipp , M. Makita , T. Matsuoka , N. Medvedev , S. Nakajima , N. Ozaki , T. Pikuz , A.V. Rode , D. Sagae , A.K. Schuster , K. Tono , D. Kraus
{"title":"Corrigendum to ultrafast anisotropic disordering in graphite driven by intense hard X-ray pulses","authors":"N.J. Hartley ,&nbsp;J. Grenzer ,&nbsp;W. Lu ,&nbsp;L.G. Huang ,&nbsp;Y. Inubushi ,&nbsp;N. Kamimura ,&nbsp;K. Katagiri ,&nbsp;R. Kodama ,&nbsp;A. Kon ,&nbsp;V. Lipp ,&nbsp;M. Makita ,&nbsp;T. Matsuoka ,&nbsp;N. Medvedev ,&nbsp;S. Nakajima ,&nbsp;N. Ozaki ,&nbsp;T. Pikuz ,&nbsp;A.V. Rode ,&nbsp;D. Sagae ,&nbsp;A.K. Schuster ,&nbsp;K. Tono ,&nbsp;D. Kraus","doi":"10.1016/j.hedp.2022.101022","DOIUrl":"10.1016/j.hedp.2022.101022","url":null,"abstract":"","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"46 ","pages":"Article 101022"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48074087","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
Detailed temperature diagnostic studies for Radishock and COAX experiments 详细的温度诊断研究的辐射冲击和同轴电缆实验
IF 1.6 3区 物理与天体物理
High Energy Density Physics Pub Date : 2023-03-01 DOI: 10.1016/j.hedp.2022.101023
C.L. Fryer , S. Wood , S.X. Coffing , H.F. Robey , C.J. Fontes , H. Johns , P. Kozlowski , T. Urbatsch , N.E. Lanier , D.D. Meyerhofer , T. Byvank
{"title":"Detailed temperature diagnostic studies for Radishock and COAX experiments","authors":"C.L. Fryer ,&nbsp;S. Wood ,&nbsp;S.X. Coffing ,&nbsp;H.F. Robey ,&nbsp;C.J. Fontes ,&nbsp;H. Johns ,&nbsp;P. Kozlowski ,&nbsp;T. Urbatsch ,&nbsp;N.E. Lanier ,&nbsp;D.D. Meyerhofer ,&nbsp;T. Byvank","doi":"10.1016/j.hedp.2022.101023","DOIUrl":"10.1016/j.hedp.2022.101023","url":null,"abstract":"<div><p>Spectral diagnostics provide a powerful probe of high energy-density physics experiments. By shining an x-ray source on a target, absorption features can be used to determine accurate temperature profiles of that target material. Many studies produce a single temperature/density measurement by fitting these observed spectra. This paper demonstrates how, by leveraging detailed simulations, we can not only measure the average temperature and density, but the full density and temperature profiles. To do so, we must conduct a careful analysis of the uncertainties in the diagnostic measurement. We discuss the characteristics and associated uncertainties of the spectral diagnostic used in the COAX, Radishock and OuTi experiments, ultimately demonstrating how these detailed studies increase the potential of this powerful probe.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"46 ","pages":"Article 101023"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43081601","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
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