High Energy Density Physics最新文献_第8页

Effect of irradiation uniformity on quasi-isentropic shock compression of solid spheres 辐照均匀性对实心球准各向同性冲击压缩的影响

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-25 DOI: 10.1016/j.hedp.2024.101124

Ryunosuke Takizawa , Hitoshi Sakagami , Hideo Nagatomo , Yasunobu Arikawa , Hiroki Morita , Jinyuan Dun , Takumi Tsuido , Yuga Karaki , Hiroki Matsubara , King Fai Farley Law , Kento Katagiri , Norimasa Ozaki , Yoichiro Hironaka , Keisuke Shigemori , Yuki Abe , Hideaki Habara , Yasuhiro Kuramitsu , Tomoyuki Johzaki , Mitsuo Nakai , Hiroyuki Shiraga , Shinsuke Fujioka

{"title":"Effect of irradiation uniformity on quasi-isentropic shock compression of solid spheres","authors":"Ryunosuke Takizawa , Hitoshi Sakagami , Hideo Nagatomo , Yasunobu Arikawa , Hiroki Morita , Jinyuan Dun , Takumi Tsuido , Yuga Karaki , Hiroki Matsubara , King Fai Farley Law , Kento Katagiri , Norimasa Ozaki , Yoichiro Hironaka , Keisuke Shigemori , Yuki Abe , Hideaki Habara , Yasuhiro Kuramitsu , Tomoyuki Johzaki , Mitsuo Nakai , Hiroyuki Shiraga , Shinsuke Fujioka","doi":"10.1016/j.hedp.2024.101124","DOIUrl":"https://doi.org/10.1016/j.hedp.2024.101124","url":null,"abstract":"<div><p>In inertial confinement fusion using central ignition, the ignition hot spot is generated through self-heating during fuel compression. In contrast, fast ignition creates the hot spot through external heating. This difference allows the fast ignition approach to use a solid sphere as the fusion fuel shape. The implosion of a solid sphere is one form of laser-direct-drive slow implosion. Solid sphere fuel exhibits tolerance to hydrodynamic instability and can be mass-produced relatively easily, offering significant advantages for developing inertial fusion energy. Achieving high fuel peak and areal densities of with a solid sphere requires quasi-isentropic compression, which involves multiple shock waves. Our results show the critical role of uniform laser irradiation in initiating weak shock waves in the early phase, which is essential for forming a uniform and dense fuel core with solid spheres. Furthermore, dynamically adjusting the laser spot diameter could be crucial in optimizing the effectiveness of laser-direct-drive and fast ignition techniques when using solid sphere fuel.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101124"},"PeriodicalIF":1.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181824000491/pdfft?md5=633f591119efc4384dc2282fd13d805b&pid=1-s2.0-S1574181824000491-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141595806","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

Experimental capabilities of the LMJ-PETAL facility LMJ-PETAL 设施的实验能力

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-22 DOI: 10.1016/j.hedp.2024.101125

W. Cayzac , G. Boutoux , S. Brygoo , A. Denoeud , S. Depierreux , V. Tassin , F. Albert , E. Alozy , C. Baccou , D. Batani , N. Blanchot , M. Bonneau , M. Bonnefille , R. Botrel , C. Bowen , P. Bradford , M. Brochier , T. Caillaud , A. Chaleil , S. Chardavoine , E. Lefebvre

引用次数: 0

Optimization of smoothing by spectral dispersion with a sinusoidal phase modulation 利用正弦相位调制的频谱色散优化平滑效果

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-20 DOI: 10.1016/j.hedp.2024.101123

Denis Penninckx , Adrien Fusaro , Rodolphe Collin , Gilles Riazuelo , Pascal Loiseau , Osel Thauvin

{"title":"Optimization of smoothing by spectral dispersion with a sinusoidal phase modulation","authors":"Denis Penninckx , Adrien Fusaro , Rodolphe Collin , Gilles Riazuelo , Pascal Loiseau , Osel Thauvin","doi":"10.1016/j.hedp.2024.101123","DOIUrl":"https://doi.org/10.1016/j.hedp.2024.101123","url":null,"abstract":"<div><p>In order to improve the propagation of a laser in a plasma, the intensity profile should be as uniform as possible. For this purpose, smoothing techniques are used. The most commonly used, smoothing by spectral dispersion (SSD), induces temporal fluctuations of the effective amplification length of Stimulated Brillouin scattering (SBS) or Stimulated Raman scattering (SRS). These fluctuations are random from shot to shot and may thus induce unpredictable levels of the efficient laser power used in laser-plasma experiments. Increasing the modulation frequency <em>f<sub>m</sub></em> while maintaining the modulation bandwidth strongly reduces these fluctuations and even reduces the average SBS level. However, increasing <em>f<sub>m</sub></em> has also an impact on laser propagation within the laser optical components. We show that, as long as chromatic dispersion is precompensated in the front-end, FM-to-AM conversion, a detrimental propagation effect, may remain sufficiently low and that anormal FM-to-AM conversion is not sensitive to the modulation frequency. Hence, there is no important bottleneck to an increase of the modulation frequency.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101123"},"PeriodicalIF":1.6,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141478584","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

Thermodynamic analysis of Magnetically charged Euler–Heisenberg black holes with scalar hair via Renyi-entropy using logarithmic correction 通过使用对数修正的雷尼熵对带有标量发丝的带磁欧拉-海森堡黑洞进行热力学分析

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-18 DOI: 10.1016/j.hedp.2024.101120

Allah Ditta , Xia Tiecheng , Riasat Ali , Ali Övgün , Asif Mahmood

{"title":"Thermodynamic analysis of Magnetically charged Euler–Heisenberg black holes with scalar hair via Renyi-entropy using logarithmic correction","authors":"Allah Ditta , Xia Tiecheng , Riasat Ali , Ali Övgün , Asif Mahmood","doi":"10.1016/j.hedp.2024.101120","DOIUrl":"https://doi.org/10.1016/j.hedp.2024.101120","url":null,"abstract":"<div><p>In this article, we investigate the thermodynamic properties of the Euler–Heisenberg black hole solution with magnetic charge and scalar hair. We also examine the evaluation of thermal fluctuations, Gibbs free energy, and energy emission. The Hawking temperature, geometric mass, and heat capacity are among the numerous factors that are computed to evaluate local and global thermodynamic stability. The first law of thermodynamics is applied to determine the temperature of the black hole, and the energy emission rate is also calculated. We investigate the phase transition behavior of the Euler–Heisenberg black hole with scalar hair by computing the Gibbs free energy, with particular attention to characteristics like eating tails. We also obtain the corrected entropy to investigate the impact of thermal fluctuations on massive and small black holes. Notably, we contrast the outcomes for large and small black holes in order to examine the effects of correction terms on the thermodynamic system.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101120"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141434745","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

Theoretical investigation of plasma ion shielding effects on the atomic structure and photoionization process in semiclassical dense electron–ion plasmas 等离子体离子屏蔽对半经典致密电子-离子等离子体中原子结构和光离子化过程影响的理论研究

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-13 DOI: 10.1016/j.hedp.2024.101121

Y.S. Tian , Z.B. Chen

{"title":"Theoretical investigation of plasma ion shielding effects on the atomic structure and photoionization process in semiclassical dense electron–ion plasmas","authors":"Y.S. Tian , Z.B. Chen","doi":"10.1016/j.hedp.2024.101121","DOIUrl":"10.1016/j.hedp.2024.101121","url":null,"abstract":"<div><p>This manuscript provides a description of a relativistic method for calculating the atomic structure and photoionization process in the semiclassical dense electron–ion plasma environment. The method uses the effective interaction pseudo-potential derived for general two interacting charged particles taking into account the quantum mechanical and screening effects to model the strongly coupled effects. The results for (bound state) energies are obtained by numerically solving the Dirac equation. The present method uses the relativistic distorted-wave approach to calculate the continuum orbitals and the ionization cross sections by photon collision. The strongly coupled semiclassical plasma effects and the plasma ion shielding effects on various properties such as ionization energies, transition rates, and photoionization cross sections are studied, focusing on the hydrogen atom as a case study. Our results are in agreement with other theoretical data. This study has important implications for the fields of atomic physics, plasma physics, astrophysics, and fusion science, and provides valuable insights into the study of various scientific phenomena.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101121"},"PeriodicalIF":1.6,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394233","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

Physical properties of rutile-TiO2 Nanoparticles and effect on PVA/SiO2 hybrid films synthesized by sol-gel method 溶胶-凝胶法合成的金红石-二氧化钛纳米粒子的物理性质及其对 PVA/SiO2 混合薄膜的影响

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-11 DOI: 10.1016/j.hedp.2024.101122

B. Gueridi , K. Bouferrache , M.A. Ghebouli , F. Rouabah , Y. Slimani , T. Chihi , M. Fatmi , B. Ghebouli , H. Bouandas , M. Habila , A. Benali

{"title":"Physical properties of rutile-TiO2 Nanoparticles and effect on PVA/SiO2 hybrid films synthesized by sol-gel method","authors":"B. Gueridi , K. Bouferrache , M.A. Ghebouli , F. Rouabah , Y. Slimani , T. Chihi , M. Fatmi , B. Ghebouli , H. Bouandas , M. Habila , A. Benali","doi":"10.1016/j.hedp.2024.101122","DOIUrl":"10.1016/j.hedp.2024.101122","url":null,"abstract":"<div><p>We use an <em>ab-initio</em> approach to analyze the structural, electronic band structure, and thermoelectric properties of titanium dioxide (TiO<sub>2</sub> in rutile phase), and we then use rutile-TiO<sub>2</sub> nanoparticles to determine its effects on sol-gel-produced polyvinyl alcohol/silicon dioxide (PVA/SiO<sub>2</sub>) hybrid films. The synthesis of hybrid films involved the incorporation of 1 % rutile-TiO<sub>2</sub> nanoparticles in the PVA/SiO<sub>2</sub> matrix. The thermoelectric properties of the resulting hybrid films were characterized by Seebeck coefficient measurements, as well as electrical and thermal conductivities. The synthesis of PVA/SiO<sub>2</sub>/Nano-TiO<sub>2</sub> films was accomplished with success. The chemical bonds have amply demonstrated that the PVA backbone is connected to the (SiO<sub>2</sub>-TiO<sub>2</sub>) network. TGA testing indicates that hybrid films are more resistant to higher temperatures than pure PVA films. SiO<sub>2</sub> nanoparticles reveal more effective loading to improve dielectric characteristics compared to TiO<sub>2</sub>. The best results are obtained in cases of mechanical, thermal and electrical insulation when both nanofillers are integrated into the polymer matrix. The findings show that the thermoelectric performance of PVA/SiO2 hybrid films is improved by the addition of (1 %) rutile-TiO<sub>2</sub> nanoparticles in the rutile phase. This study provides insights into the potential applications of rutile-TiO<sub>2</sub> nanoparticles in enhancing the thermoelectric properties of hybrid materials and opens up avenues for further research in this area, and contributes to the growing body of knowledge on enhancing the thermoelectric properties of materials by incorporating rutile-TiO<sub>2</sub> nanoparticles into hybrid films synthesized by the sol-gel method.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101122"},"PeriodicalIF":1.6,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141413277","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

Use of tritium-rich fuel to improve the yield of layered deuterium/tritium inertial fusion capsules 利用富氚燃料提高分层氘/氚惯性聚变胶囊的产量

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-06-04 DOI: 10.1016/j.hedp.2024.101118

B.J. Albright, W. Daughton, B.M. Haines, N.M. Hoffman, J.J. Kuczek, R. Lester, K.D. Meaney, J.P. Sauppe

{"title":"Use of tritium-rich fuel to improve the yield of layered deuterium/tritium inertial fusion capsules","authors":"B.J. Albright, W. Daughton, B.M. Haines, N.M. Hoffman, J.J. Kuczek, R. Lester, K.D. Meaney, J.P. Sauppe","doi":"10.1016/j.hedp.2024.101118","DOIUrl":"10.1016/j.hedp.2024.101118","url":null,"abstract":"<div><p>In deuterium–tritium (DT) ice layered implosions, nearly all hot spot mass at peak burn comes from the dense fuel. Accurate prediction of the fuel mass ablation, including the enthalpy associated with mass inflow into the hot spot from the dense fuel, is essential to understanding the energetics and ignition of the hot spot in layered implosions. A recently published boundary layer analysis (Daughton et al., 2023) indicates a faster mass ablation rate than in previous analyses of layered implosions. Inclusion of this effect provides a better match to simulations and leads to a new ignition threshold where the temperature of the dense fuel plays a critical role. This analysis motivates possible new directions for improved capsule performance. Here, the authors present evidence in support of one such approach: the use of tritium-rich ice to decrease 14 MeV neutron scattering and heating of the dense fuel, resulting in less mass ablation and more robust burn of the hot spot. It is found from numerical simulations that despite a less favorable D:T ratio in the ice, the use of a 40:60 D:T ratio leads to an <em>increase</em> in capsule yield of 17% percent compared with that of a 50:50 D:T ratio fuel for capsules resembling those of the recent N210808 ignition experiment on the NIF (Abu-Shawareb et al., 2022) and an increase of 74% compared with that of a 60:40 D:T ratio fuel capsule. These results are potentially important for modeling all layered implosions, since some degree of DT fractionization may arise naturally during the beta layering process. In addition, this physics is important for the feasibility of high-gain capsule designs that seek to minimize tritium usage, as in some inertial fusion energy concepts.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101118"},"PeriodicalIF":1.6,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141278346","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

Three-dimensional reconstruction of implosion stagnation in laser direct drive on OMEGA 欧米茄激光直接驱动中内爆停滞的三维重建

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-05-23 DOI: 10.1016/j.hedp.2024.101108

K. Churnetski , K.M. Woo , W. Theobald , C. Stoeckl , L. Ceurvorst , V. Gopalaswamy , H.G. Rinderknecht , P.V. Heuer , J.P. Knauer , C.J. Forrest , I.V. Igumenshchev , S.T. Ivancic , M. Michalko , R.C. Shah , A. Lees , P.B. Radha , R. Betti , C.A. Thomas , S.P. Regan , J. Kunimune , J.A. Frenje

{"title":"Three-dimensional reconstruction of implosion stagnation in laser direct drive on OMEGA","authors":"K. Churnetski , K.M. Woo , W. Theobald , C. Stoeckl , L. Ceurvorst , V. Gopalaswamy , H.G. Rinderknecht , P.V. Heuer , J.P. Knauer , C.J. Forrest , I.V. Igumenshchev , S.T. Ivancic , M. Michalko , R.C. Shah , A. Lees , P.B. Radha , R. Betti , C.A. Thomas , S.P. Regan , J. Kunimune , J.A. Frenje","doi":"10.1016/j.hedp.2024.101108","DOIUrl":"10.1016/j.hedp.2024.101108","url":null,"abstract":"<div><p>Multidimensional effects on hot-spot formation must be considered to better understand the current limits on the performance of direct-drive inertial confinement fusion experiments on OMEGA with cryogenically layered solid deuterium–tritium targets. A comprehensive reconstruction effort has been established at the Laboratory for Laser Energetics to infer hot-spot and shell conditions at stagnation from a large collection of x-ray, neutron, and particle detectors along multiple lines of sight. Several time-gated and time-integrated x-ray imagers are being used to record the shape of the hot-spot plasma. A 3D hot-spot x-ray emission tomography technique has been developed to infer low-mode drive asymmetries from the hot-spot shape. A suite of neutron diagnostics is used to provide measurements of hot-spot flow velocity, ion temperature, and areal density. The information obtained from the x-ray and neutron detectors will be combined into a coherent model of the shape of the hot spot and shell assembly.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101108"},"PeriodicalIF":1.6,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141144914","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

Resistive diffusion in magnetized ICF implosions: Reduced magnetic stabilization of the Richtmyer–Meshkov instability 磁化 ICF 内爆中的电阻扩散：Richtmyer-Meshkov 不稳定性的减磁稳定性

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-05-13 DOI: 10.1016/j.hedp.2024.101103

C.A. Walsh , D.J. Strozzi , H. Sio , B.B. Pollock , B.D. Appelbe , A.J. Crilly , S. O’Neill , C. Weber , J.P. Chittenden , J.D. Moody

{"title":"Resistive diffusion in magnetized ICF implosions: Reduced magnetic stabilization of the Richtmyer–Meshkov instability","authors":"C.A. Walsh , D.J. Strozzi , H. Sio , B.B. Pollock , B.D. Appelbe , A.J. Crilly , S. O’Neill , C. Weber , J.P. Chittenden , J.D. Moody","doi":"10.1016/j.hedp.2024.101103","DOIUrl":"https://doi.org/10.1016/j.hedp.2024.101103","url":null,"abstract":"<div><p>Resistive diffusion is typically regarded to be negligible in magnetized ICF experiments, with magnetic flux effectively compressed during the implosion. In this work the Richtmyer–Meshkov instability at the ice-ablator interface is taken as an example for investigating resistive effects. For a high temperature (<span><math><mo>≈</mo></math></span>100eV) interface with magnetic field applied perpendicular to shock propagation, perturbation growth is suppressed by magnetic tension. However, for lower temperature interfaces the resistive diffusion prevents substantial magnetic field twisting at small scales. ICF implosion simulations are then used to assess magnetic diffusivity at different interfaces; the ice-ablator interface is found to be too resistive for the magnetic fields to enhance stability. For Rayleigh–Taylor growth at the hot-spot edge, on the other hand, resistivity is estimated to only be a secondary effect, as seen in previous simulation studies.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"51 ","pages":"Article 101103"},"PeriodicalIF":1.6,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141068056","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

Isofield plasma expansion in kJ petawatt laser-driven ion acceleration with a tailored fast electron temperature 千焦帕特激光驱动离子加速中的等场等离子体膨胀与定制的快速电子温度

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-05-11 DOI: 10.1016/j.hedp.2024.101107

N. Iwata , K. Mima , Y. Sentoku

{"title":"Isofield plasma expansion in kJ petawatt laser-driven ion acceleration with a tailored fast electron temperature","authors":"N. Iwata , K. Mima , Y. Sentoku","doi":"10.1016/j.hedp.2024.101107","DOIUrl":"10.1016/j.hedp.2024.101107","url":null,"abstract":"<div><p>Kilojoule-class relativistic intensity lasers, having multi-picosecond (ps) pulse durations, enable efficient ion acceleration in the interaction with thin foil targets. The foil plasma expands under the laser energy input over picoseconds where fast electrons keep increasing their effective temperature, while they convert a part of the energy into fast ions through generation of a sheath electric field. The temporal evolution of the sheath electric field is the key to understanding the efficient ion acceleration seen in kJ-class laser experiments. Here, we extend the non-isothermal plasma expansion model by introducing a temporal function of the effective temperature of fast electrons to obtain the sheath electric field in the expanding plasma. We theoretically derived that when the effective temperature of fast electrons increases in proportional to the square of the time, the strength of the sheath electric field is kept constant without depletion during the expansion. This ‘isofield’ expansion is confirmed by a quasi-one-dimensional particle-in-cell simulation. The isofield expansion results in a high energy ion acceleration with a small expansion length, which is favorable for realizing an efficient ion acceleration with less lateral energy loss in multi-dimensional situations.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"51 ","pages":"Article 101107"},"PeriodicalIF":1.6,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141047057","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