High Energy Density Physics最新文献_第2页

Electron impact ionization in dense plasmas 致密等离子体中的电子碰撞电离

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-28 DOI: 10.1016/j.hedp.2024.101153

Walter R. Johnson , Joseph Nilsen , K.T. Cheng

引用次数: 0

Stable creation of a single plasma channel and collimated fast electrons using large-scale PIC simulations with new dynamic load-balancing technique 利用新型动态负载平衡技术进行大规模 PIC 模拟，稳定创建单个等离子体通道和准直快速电子

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-26 DOI: 10.1016/j.hedp.2024.101147

Hideaki Habara , Yoshinori Ueyama , Yutaka Nakamura , Hitoshi Sakagami

引用次数: 0

Mykonos: A pulsed power driver for science and innovation 米克诺斯岛促进科学和创新的脉冲功率驱动器

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-24 DOI: 10.1016/j.hedp.2024.101144

Jens Schwarz , Brian Hutsel , Thomas Awe , Bruno Bauer , Jacob Banasek , Eric Breden , Joe Chen , Michael Cuneo , Katherine Chandler , Karen DeZetter , Mark Gilmore , Matthew Gomez , Hannah Hasson , Maren Hatch , Nathan Hines , Trevor Hutchinson , Deanna Jaramillo , Christine Kalogeras Loney , Ian Kern , Derek Lamppa , Kevin Yates

{"title":"Mykonos: A pulsed power driver for science and innovation","authors":"Jens Schwarz , Brian Hutsel , Thomas Awe , Bruno Bauer , Jacob Banasek , Eric Breden , Joe Chen , Michael Cuneo , Katherine Chandler , Karen DeZetter , Mark Gilmore , Matthew Gomez , Hannah Hasson , Maren Hatch , Nathan Hines , Trevor Hutchinson , Deanna Jaramillo , Christine Kalogeras Loney , Ian Kern , Derek Lamppa , Kevin Yates","doi":"10.1016/j.hedp.2024.101144","DOIUrl":"10.1016/j.hedp.2024.101144","url":null,"abstract":"<div><p>Sandia National Laboratories has been operating the Mykonos linear transformer driver (LTD) in a five-cavity configuration since 2014. The machine operates at 1MA output current, 500kV output voltage, with a 10–90% current rise time of 85ns, which enables small scale physics and engineering pulsed power experiments. Mykonos provides hands-on pulsed power experimental training for students and staff alongside senior Sandia scientists in an environment that is more accessible than the Z Facility. Over the years, we have fielded and accumulated a wide variety of optical, x-ray and electrical diagnostics and we are preparing to open this facility to outside users. Here, we are presenting the pulsed power and diagnostic capability of Mykonos as well as some recent experiments that have been performed on the facility. The goal of this publication is to attract researchers across the pulsed power and high energy density (HED) community to collaborate with Sandia on exciting, innovative science and to train the next generation of researchers for the National Nuclear Security Agency (NNSA) and the nation. As such, we have established a Mykonos Academic Access Program (MAAP) as part of ZNetUS to enable academic utilization of the Mykonos Pulsed Power Facility.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"53 ","pages":"Article 101144"},"PeriodicalIF":1.6,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181824000697/pdfft?md5=45d54956ff92e35e2faebd1e3eec6f99&pid=1-s2.0-S1574181824000697-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148472","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

A hybrid simulation integrating molecular dynamics and particle-in-cell methods for improved laser-target interaction 集成分子动力学和粒子入胞法的混合模拟，用于改进激光与目标的相互作用

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-24 DOI: 10.1016/j.hedp.2024.101148

Harihara Sudhan Kumar , Masayuki Takahashi , Yasuhiro Kuramitsu , Takumi Minami , Hiromitsu Kiriyama , Yuji Fukuda , Naofumi Ohnishi

{"title":"A hybrid simulation integrating molecular dynamics and particle-in-cell methods for improved laser-target interaction","authors":"Harihara Sudhan Kumar , Masayuki Takahashi , Yasuhiro Kuramitsu , Takumi Minami , Hiromitsu Kiriyama , Yuji Fukuda , Naofumi Ohnishi","doi":"10.1016/j.hedp.2024.101148","DOIUrl":"10.1016/j.hedp.2024.101148","url":null,"abstract":"<div><p>Ultra-thin targets (less than 10 nm), such as graphene, can be irradiated with relativistic intensity lasers to generate energetic ions. However, the laser prepulse can prematurely destroy these targets and significantly influence the final ion energies. Due to the limitations of the conventional hydrodynamic model, simulating the interaction between ultra-thin targets and a prepulse is infeasible. To overcome this issue, we propose a hybrid simulation technique in this study. This technique involves simulating the target-prepulse interaction using molecular dynamics (MD) simulation, which is then combined with the particle-in-cell simulation for the target-main pulse interaction, in order to accurately model the entire laser-target interaction dynamics. A realistic, experimentally measured laser intensity profile for the prepulse is used for the MD simulation, and the particle energies from this hybrid simulation are found to be in good agreement with the experiment.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"53 ","pages":"Article 101148"},"PeriodicalIF":1.6,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083198","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

Extension of the SpK atomic physics code to generate global equation of state data 扩展 SpK 原子物理代码以生成全局状态方程数据

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-21 DOI: 10.1016/j.hedp.2024.101136

Adam R. Fraser , A.J. Crilly , N.-P.L. Niasse , D.A. Chapman , J.D. Pecover , S.J. O’Neill , J.P. Chittenden

{"title":"Extension of the SpK atomic physics code to generate global equation of state data","authors":"Adam R. Fraser , A.J. Crilly , N.-P.L. Niasse , D.A. Chapman , J.D. Pecover , S.J. O’Neill , J.P. Chittenden","doi":"10.1016/j.hedp.2024.101136","DOIUrl":"10.1016/j.hedp.2024.101136","url":null,"abstract":"<div><p>Global microphysics models are required for the modelling of high-energy-density physics (HEDP) experiments, the improvement of which are critical to the path to inertial fusion energy. This work presents further developments to the atomic and microphysics code, <span>SpK</span>, part of the numerical modelling suite of Imperial College London and First Light Fusion. We extend the capabilities of <span>SpK</span> to allow the calculation of the equation of state (EoS). The detailed configuration accounting calculations are interpolated into finite-temperature Thomas–Fermi calculations at high coupling to form the electronic component of the model. The Cowan model provides the ionic contribution, modified to approximate the physics of diatomic molecular dissociation. By utilising bonding corrections and performing a Maxwell construction, <span>SpK</span> captures the EoS from states ranging from the zero-pressure solid, through the liquid–vapour coexistence region and into plasma states. This global approach offers the benefit of capturing electronic shell structure over large regions of parameter space, building highly-resolved tables in minutes on a simple desktop. We present shock Hugoniot and off-Hugoniot calculations for a number of materials, comparing <span>SpK</span> to other models and experimental data. We also apply EoS and opacity data generated by <span>SpK</span> in integrated simulations of indirectly-driven capsule implosions, highlighting physical sensitivities to the choice of EoS models.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"53 ","pages":"Article 101136"},"PeriodicalIF":1.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088906","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

Observation of ion species energy dependence on charge-to-mass ratio in laser-driven magnetic reconnection experiment 在激光驱动的磁重联实验中观测离子物种能量与电荷质量比的关系

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-19 DOI: 10.1016/j.hedp.2024.101137

K.F.F. Law , J. Dun , Y. Abe , A. Morace , Y. Arikawa , Ph. Korneev , J.J. Santos , S. Fujioka

引用次数: 0

Matrix methods for opacity calculations 计算不透明度的矩阵方法

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-08-05 DOI: 10.1016/j.hedp.2024.101135

C. Bowen

引用次数: 0

Indirect drive ICF design study for a 3 MJ NIF enhanced yield capability 针对 3 兆焦耳 NIF 增强产量能力的间接驱动 ICF 设计研究

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-07-23 DOI: 10.1016/j.hedp.2024.101134

S.A. MacLaren, J.L. Milovich, D.E. Fratanduono, A.J. Kemp, T.D. Chapman, G.E. Cochran, P.F. Schmit, R.C. Nora

引用次数: 0

Generalizing the moments method for primary neutron spectra 原生中子谱矩法的推广

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-07-23 DOI: 10.1016/j.hedp.2024.101128

B.D. Appelbe, A.J. Crilly, C. Pimpirev

{"title":"Generalizing the moments method for primary neutron spectra","authors":"B.D. Appelbe, A.J. Crilly, C. Pimpirev","doi":"10.1016/j.hedp.2024.101128","DOIUrl":"10.1016/j.hedp.2024.101128","url":null,"abstract":"<div><p>Motivated by recent experimental results Hartouni et al. (2023); Mannion et al. (2023) which identified the presence of non-Maxwellian ion velocity distributions in ICF plasmas, we revisit the moments method for analysing the shapes of primary neutron spectra emitted by plasmas undergoing thermonuclear burn. We assume that the ion distribution functions are of an arbitrary form and develop a set of “generalized” moments, that are ordered in terms of increasing powers of centre of mass velocity, but for which the effects of shifts of centre of mass velocity (equivalent to fluid velocity in the case of Maxwellian ion distributions) are suppressed. This set of generalized moments provides the most sensitive measure of relative velocity contributions to the shape of the neutron spectrum (an effect that has been colloquially referred to as “viso”). We also demonstrate that pairs of antipodal neutron spectral detectors are most suitable for measuring these contributions.</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101128"},"PeriodicalIF":1.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1574181824000533/pdfft?md5=bc17dc808877ae1942eefac836a5b077&pid=1-s2.0-S1574181824000533-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776580","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

Delivering laser performance conditions to enable fusion ignition, and beyond at the National Ignition Facility 在国家点火装置上提供激光性能条件，以实现聚变点火及其他功能

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2024-07-15 DOI: 10.1016/j.hedp.2024.101130

JM. Di Nicola, T. Suratwala, L. Pelz, J. Heebner, R. Aden, D. Alessi, S. Amula, A. Barnes, A. Bhasker, T. Bond, J. Bude, B. Buckley, D. Browning, J. Cabral, A. CalonicoSoto, W. Carr, L. Chang, J. Chou, S. Cohen, T. Cope, G. Brunton

{"title":"Delivering laser performance conditions to enable fusion ignition, and beyond at the National Ignition Facility","authors":"JM. Di Nicola, T. Suratwala, L. Pelz, J. Heebner, R. Aden, D. Alessi, S. Amula, A. Barnes, A. Bhasker, T. Bond, J. Bude, B. Buckley, D. Browning, J. Cabral, A. CalonicoSoto, W. Carr, L. Chang, J. Chou, S. Cohen, T. Cope, G. Brunton","doi":"10.1016/j.hedp.2024.101130","DOIUrl":"10.1016/j.hedp.2024.101130","url":null,"abstract":"<div><p>On December 5th, 2022, controlled fusion ignition was demonstrated for the first time at the National Ignition Facility (NIF), a major achievement in the field of Inertial Confinement Fusion (ICF) requiring a multi-decadal effort involving broad national and international collaborations. To drive the fusion ignition reaction with the compressed fuel capsule, that yielded 3.15 MJ of nuclear energy [<span><span>1</span></span>], the NIF laser delivered a high-precision pulse shape with 2.05 MJ of ultra-violet (UV) laser energy and a peak power of 440 TW. This laser energy was an increase of ∼8 % compared to that delivered on the previous “threshold of ignition” record yield experiment (1.37 MJ of yield for 1.89 MJ of laser energy) on August 8th, 2021 [<span><span>2</span></span>].</p><p>We explain how the results of our extensive research in laser technology and UV optics damage mitigation led to major improvements in the NIF laser, enabling this energy increase along with additional accuracy, precision, and power balance enhancements. Furthermore, we will discuss on-going efforts that have enabled operations at 2.2 MJ of UV energy as well as potential new initiatives to push the laser performance –accuracy and delivered energy– to even higher levels in the future as previously demonstrated on a small subset of NIF beams [<span><span>3</span></span>].</p></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"52 ","pages":"Article 101130"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695528","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