High Energy Density Physics最新文献

Ion acceleration with an intense short-pulse laser and large-area suspended graphene in an extremely thin target regime 离子加速与强短脉冲激光和大面积悬浮石墨烯在极薄靶区

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-04-04 DOI: 10.1016/j.hedp.2025.101195

T. Minami , C.M. Chu , O. McCusker , K. Sakai , Y.T. Liao , N. Tamaki , Ko. Kondo , H. Kiriyama , S. Egashira , M. Ota , A. Morace , Y. Sakawa , M. Alkhimova , T. Pikuz , F. Nikaido , T. Yasui , S. Suzuki , Y. Abe , H. Habara , H.S. Kumar , Y. Kuramitsu

{"title":"Ion acceleration with an intense short-pulse laser and large-area suspended graphene in an extremely thin target regime","authors":"T. Minami , C.M. Chu , O. McCusker , K. Sakai , Y.T. Liao , N. Tamaki , Ko. Kondo , H. Kiriyama , S. Egashira , M. Ota , A. Morace , Y. Sakawa , M. Alkhimova , T. Pikuz , F. Nikaido , T. Yasui , S. Suzuki , Y. Abe , H. Habara , H.S. Kumar , Y. Kuramitsu","doi":"10.1016/j.hedp.2025.101195","DOIUrl":"10.1016/j.hedp.2025.101195","url":null,"abstract":"<div><div>Graphene is an atomic thin 2D material, known as the strongest material with such a thin regime. Free-standing, large-area suspended graphene (LSG) has been developed for a target of laser-driven ion acceleration. The LSG has shown remarkable durability against laser prepulse, producing MeV protons and carbons by direct irradiation with an intense laser without a plasma mirror, yet no optimization has been concerned. Here we investigate the optimization of the laser-driven ion acceleration with LSG, paying special attention to the target conditions. We irradiate nanometer-thick LSG with an intense laser, where the incident angle and the target thickness are controlled. The maximum proton energy increases with increasing the number of LSG layers, where <span><math><mrow><mn>25</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>3</mn><mspace></mspace><mi>MeV</mi></mrow></math></span> protons at maximum are consistently observed with Thomson parabola spectrometer and diamond-based detectors. For comparison purposes, we perform ideal numerical simulations using particle-in-cell (PIC) code without consideration of the prepulse. In the PIC simulation, the protons are successively accelerated by the electric field associated with laser radiation pressure and the surface sheath field, yet the maximum proton energies are overestimated. The maximum proton energies from the experiment asymptotically approach the ideal PIC expectations, indicating that the thinner LSG is more affected by the prepulse. We expect higher proton energy with the optimized LSG conditions and a plasma mirror.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101195"},"PeriodicalIF":1.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816637","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

Exploring capabilities of Micro-Fabricated 3D-printed capsules for studying effects of material mix on thermonuclear burn 探索微制造3d打印胶囊用于研究材料混合对热核燃烧的影响的能力

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-29 DOI: 10.1016/j.hedp.2025.101194

T.A. Coffman , Y. Kim , L.M. Green , R.S. Lester , B.M. Haines , D.W. Schmidt , P. Donovan , B. Patterson , R.W. VanDervort , P.J. Adrian , P.M. Kozlowski , R.H. Dwyer , J.M. Levesque , C. Fry , A. Haid , M. Do , C. Shuldberg

{"title":"Exploring capabilities of Micro-Fabricated 3D-printed capsules for studying effects of material mix on thermonuclear burn","authors":"T.A. Coffman , Y. Kim , L.M. Green , R.S. Lester , B.M. Haines , D.W. Schmidt , P. Donovan , B. Patterson , R.W. VanDervort , P.J. Adrian , P.M. Kozlowski , R.H. Dwyer , J.M. Levesque , C. Fry , A. Haid , M. Do , C. Shuldberg","doi":"10.1016/j.hedp.2025.101194","DOIUrl":"10.1016/j.hedp.2025.101194","url":null,"abstract":"<div><div>The introduction of a high-precision, 3D-printing method, known as two-photon polymerization (2PP), has created a new means of producing novel targets to study inertial confinement fusion (ICF). This work aims to explore if 2PP fabricated capsules can meet ICF requirements such as size, uniformity, deuteration degree, and ability to maintain gas fill. Two types of capsules with 3D-printed lattices were evaluated on the Omega-60 Laser Facility: (1) carbon-deuterium-oxygen (CDO) lattice with a H<sub>2</sub> gas fill and (2) carbon-hydrogen-oxygen (CHO) lattice with a D<sub>2</sub> gas fill. Experimental results and numerical simulations, which assumed complete mixing of capsule materials, reasonably agreed for both target types. A further study into the effects of capsule preheat or 2PP geometry on material mix is underway. Our work demonstrates that the unique capabilities of customizable, 3D-printed capsules present promising opportunities for further investigation into more sophisticated mix and burn experiments in ICF.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101194"},"PeriodicalIF":1.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785564","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

Exploring hybrid scalar factor and ekpyrotic bouncing cosmology in f(Q,R) Gravity 探索f（Q，R）引力中的混合标量因子和热弹跳宇宙学

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-28 DOI: 10.1016/j.hedp.2025.101188

Aimen Rauf , Bander Almutairi , A.S. Khan

{"title":"Exploring hybrid scalar factor and ekpyrotic bouncing cosmology in f(Q,R) Gravity","authors":"Aimen Rauf , Bander Almutairi , A.S. Khan","doi":"10.1016/j.hedp.2025.101188","DOIUrl":"10.1016/j.hedp.2025.101188","url":null,"abstract":"<div><div>In this study, we delve into the evolution of the Hubble parameter, focusing on its sign reversal in the early universe and its stability within <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity. Methods are employed to investigate the universe’s behavior concerning hybrid scale factor scenarios, including the sub-relativistic, radiation, ultra-relativistic, dust, and stiff fluid universes, concerning the equation of state (EoS) parameters. This research builds on previous ones by providing a more in-depth investigation of the bouncing scenarios inside the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity framework, reconstructing gravitational Lagrangians established for certain parameter values. Once rebuilt, these Lagrangians allow the examination of energy conditions required for a realistic bouncing model and give analytical answers to the ekpyrotic (Ekkart) bounce model. The function of exotic matter, renowned for its high negative pressure, is the key factor promoting the universe’s acceleration expansion. An analysis of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity theories, particularly focusing on bouncing scenarios, distinguishes this work from earlier studies on alternative gravity theories and their cosmological implications. This research offers a detailed investigation of bouncing models along with a detailed examination of the energy conditions present in <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101188"},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738599","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

The screening effect of the plasma ions on the electron-impact excitation process and subsequent polarization of X-ray photoemission 等离子体离子对电子冲击激发过程和x射线光发射的后续极化的屏蔽效应

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-28 DOI: 10.1016/j.hedp.2025.101193

Z.B. Chen , P.F. Liu , Y.Y. Qi , G.P. Zhao , H.Y. Sun

{"title":"The screening effect of the plasma ions on the electron-impact excitation process and subsequent polarization of X-ray photoemission","authors":"Z.B. Chen , P.F. Liu , Y.Y. Qi , G.P. Zhao , H.Y. Sun","doi":"10.1016/j.hedp.2025.101193","DOIUrl":"10.1016/j.hedp.2025.101193","url":null,"abstract":"<div><div>In this manuscript, we calculate the spectral properties and the electron-impact excitation cross sections in the semiclassical dense hydrogen plasmas, by solving the modified relativistic Dirac equation based on the Dirac-Coulomb Hamiltonian and using the suggested relativistic distorted wave method, respectively. The obtained cross sections are then used to study the polarization of the de-excitation X-ray photoemission, which allows a deeper probe of the electronic structural properties of the atoms/ions, thus yielding a comprehensive understanding of the underlying atomic processes. We employ the effective model potential proposed by Ramazanov et al. (2015) to replace the electron-nucleus Coulomb potential, where the former (potential) is derived for general two interacting charged particles taking into account the quantum mechanical and screening effects in semiclassical dense plasmas. Relativistic effects, including the Breit interaction and dominant quantum electrodynamics corrections, are included. Our study involves a comprehensive investigation of the screening effect of the plasma ions on the various properties such as the bound state energies, excitation energies, transition rates, electron-impact excitation cross sections and subsequent polarizations of X-ray photoemission across a wide range of plasma parameters. We compare our numerical results with other available experimental and theoretical data, showing good agreement. The outcomes of this work not only help to better understand the fundamental properties of plasmas, but also provide important applications in fusion, astrophysics, and other fields.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101193"},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734751","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

Siegert-pseudostate formulation with B-splines 具有b样条的siegert伪态公式

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-26 DOI: 10.1016/j.hedp.2025.101191

H.B. Tran Tan, C.J. Fontes, C.E. Starrett

引用次数: 0

Exploring the generalized fifth-order (2 + 1)-dimensional KdV equation: The lump structures and collision phenomena to the shallow water under gravity and nonlinear lattice 探索广义五阶（2 + 1）维KdV方程：重力和非线性晶格作用下浅水的团块结构和碰撞现象

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-20 DOI: 10.1016/j.hedp.2025.101186

Usman Younas , Tukur Abdulkadir Sulaiman , Hajar Farhan Ismael , Patient Zihisire Muke

{"title":"Exploring the generalized fifth-order (2 + 1)-dimensional KdV equation: The lump structures and collision phenomena to the shallow water under gravity and nonlinear lattice","authors":"Usman Younas , Tukur Abdulkadir Sulaiman , Hajar Farhan Ismael , Patient Zihisire Muke","doi":"10.1016/j.hedp.2025.101186","DOIUrl":"10.1016/j.hedp.2025.101186","url":null,"abstract":"<div><div>This study deals the lump structures and interaction phenomena to the (2 + 1)-dimensional generalized fifth-order KdV (2GKdV) equation which demonstrates long wave movements under the gravity field and in a two-dimensional nonlinear lattice in shallow water. A variety of solutions like lump periodic, collision between lumps and hyperbolic solutions as well as exponential solutions, breather waves, two wave solutions are under consideration. The Hirota perturbation expansion technique with setting nonzero background wave has been adopted for investing the studied model and securing the solutions. A lump solution is a rational function solution which is real analytic and decays in all directions of space variables. Breather waves refer to solitary waves that exhibit both partial localization and periodic structure in either space or time. Breathers serve crucial functions in nonlinear physics and have been observed in various physical domains, including optics, hydrodynamics, and quantized superfluidity. The specified parameter values produce a variety of graphs with distinctive shapes to visually represent the results. The technique’s performance, clarity, and visibility are highlighted in its suitability for various nonlinear equations in computational physics and other research domains, illustrating collision-related components and solution properties.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101186"},"PeriodicalIF":1.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679262","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

Evaluation of circular geodesics and thermodynamics of a Bumblebee gravity-like black hole 大黄蜂引力黑洞的圆测地线和热力学评价

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-20 DOI: 10.1016/j.hedp.2025.101189

Riasat Ali , Terkaa Victor Targema , Xia Tiecheng , Rimsha Babar

{"title":"Evaluation of circular geodesics and thermodynamics of a Bumblebee gravity-like black hole","authors":"Riasat Ali , Terkaa Victor Targema , Xia Tiecheng , Rimsha Babar","doi":"10.1016/j.hedp.2025.101189","DOIUrl":"10.1016/j.hedp.2025.101189","url":null,"abstract":"<div><div>In this study, we explore the thermodynamic and geodesic stability of Reissner–Nordström (RN) black holes within the framework of Bumblebee gravity (BG), a Lorentz-violating extension of general relativity (GR). By examining the black hole’s mass distribution and horizon thermodynamics, we establish that although charged black holes in BG exhibit local stability, they remain globally unstable. This conclusion is substantiated by the positive-definite Gibbs free energy and the negative-definite Hessian matrix, which collectively indicate a fundamental instability in the system’s global equilibrium. We utilized the effective potential to derive the Lyapunov exponents for both time-like and null geodesics, assessing their stability. We found that the circular orbits beyond the innermost stable circular orbits in the Schwarzschild regime are stable, which contrasts with the RN black hole solution in GR. Furthermore, our findings demonstrate that a strong Bumblebee field induces unstable orbits. We establish that extreme RN black holes in Einstein gravity do not possess quasi-normal frequencies and instead exhibit stable, constant perturbations. In the non-extremal case, perturbations settle into a steady state, maintaining a constant amplitude. This behavior parallels observations made in the context of the Bumblebee effect.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101189"},"PeriodicalIF":1.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679259","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

Electron density in air laser plasma created by femtosecond pulses of laser radiation 由飞秒激光辐射脉冲产生的空气激光等离子体中的电子密度

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-17 DOI: 10.1016/j.hedp.2025.101190

I.A. Zyatikov, V.F. Losev

引用次数: 0

Study of cosmic parameters and thermodynamics of higher dimensional Einstein Chern–Simons cosmology through Barrow entropy 通过巴罗熵研究高维爱因斯坦-陈-西蒙斯宇宙学的宇宙参数和热力学

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-15 DOI: 10.1016/j.hedp.2025.101187

A. Jawad , Nadeem Azhar , Warisha , N. Myrzakulov , K. Yerzhanov , S. Myrzakul

引用次数: 0

Estimate calculation of discrete energy levels in the hydrogen atom using an indeterministic method 用不确定方法估计计算氢原子的离散能级