Laser and Particle Beams最新文献_第10页

State of the art 技术水平

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-07-23 DOI: 10.1007/978-3-662-61886-8_2

Juan Pablo Calderón Urbina

引用次数: 0

Density jump for parallel and perpendicular collisionless shocks 平行和垂直无碰撞冲击的密度跳跃

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000117

A. Bret, R. Narayan

引用次数: 4

Experimental optimization of the hundred-keV electron source from laser-driven wire target 激光驱动线靶百kev电子源的实验优化

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000051

Y. Zeng, Chuliang Zhou, R. Qi, Zhongpeng Li, Haiyi Sun, Ye Tian, Jiansheng Liu, Zhi‐zhan Xu

引用次数: 0

LPB volume 38 issue 2 Cover and Back matter LPB第38卷第2期封面和封底

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s026303462000021x

引用次数: 0

LPB volume 38 issue 2 Cover and Front matter LPB第38卷第2期封面和封面

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000208

引用次数: 0

Selective amplification of the chirped attosecond pulses produced from relativistic electron mirrors 相对论性电子镜产生的啁啾阿秒脉冲的选择性放大

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000142

F. Tan, Shaolong Wang, Bo Zhang, Z. Zhang, B. Zhu, Yu Chi Wu, Mingyang Yu, Yue Yang, Gang Li, Tiankui Zhang, Yong-hong Yan, F. Lu, W. Fan, Wei Zhou, Y. Gu

{"title":"Selective amplification of the chirped attosecond pulses produced from relativistic electron mirrors","authors":"F. Tan, Shaolong Wang, Bo Zhang, Z. Zhang, B. Zhu, Yu Chi Wu, Mingyang Yu, Yue Yang, Gang Li, Tiankui Zhang, Yong-hong Yan, F. Lu, W. Fan, Wei Zhou, Y. Gu","doi":"10.1017/s0263034620000142","DOIUrl":"https://doi.org/10.1017/s0263034620000142","url":null,"abstract":"In this paper, the generation of relativistic electron mirrors (REMs) and the reflection of an ultra-short laser off this mirrors are discussed, applying two-dimensional particle-in-cell (2D-PIC) simulations. REMs with ultra-high acceleration and expanding velocity can be produced from a solid nanofoil illuminated normally by an ultra-intense femtosecond laser pulse with a sharp rising edge. Chirped attosecond pulse can be produced through the reflection of a counter-propagating probe laser off the accelerating REM. In the electron moving frame, the plasma frequency of the REM keeps decreasing due to its rapidly expanding. The laser frequency, on the contrary, keeps increasing due to the acceleration of REM and the relativistic Doppler shift from the lab frame to the electron moving frame. Within an ultra-short time interval, the two frequencies will be equal in the electron moving frame, which leads the resonance between laser and REM. The reflected radiation near this interval and the corresponding spectra will be amplified due to the resonance. Through adjusting the arriving time of the probe laser, certain part of the reflected field could be selectively amplified or depressed, leading to the selectively adjusting of the corresponding spectra.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"60 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80561513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimization of laser parameters for proton acceleration using double laser pulses in TNSA mechanism 双脉冲TNSA机制下质子加速激光参数的优化

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000063

Saurabh Kumar, D. N. Gupta

{"title":"Optimization of laser parameters for proton acceleration using double laser pulses in TNSA mechanism","authors":"Saurabh Kumar, D. N. Gupta","doi":"10.1017/s0263034620000063","DOIUrl":"https://doi.org/10.1017/s0263034620000063","url":null,"abstract":"The energy of protons accelerated by ultra-intense lasers in the target normal sheath acceleration (TNSA) mechanism can be greatly enhanced by the laser parameter optimization. We propose to investigate the optimization of laser parameters for proton acceleration using double laser pulses in TNSA mechanism. The sheath field generation at the rear side of the target is significantly affected by the introduction of second laser pulse in TNSA mechanism, and consequently, the energy of the accelerated protons is also modified. The second laser pulse was introduced with different delays to study its impact on proton acceleration. Our study shows that the interplay of laser intensity and pulse duration of both laser pulses affects the proton acceleration. It was found that the proton maximum energy is the function of both laser intensity and pulse duration. A number of simulations have been performed to obtain maximum proton energy data under different combinations of laser intensity and pulse duration for the two laser pulses. The simulation results account for the underline physics for the proton bunch energy and the sheath field as a function of pulse intensity and pulse delay.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"74 1","pages":"73-78"},"PeriodicalIF":0.9,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73215864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 5

Nano-wrinkles, compactons, and wrinklons associated with laser-induced Rayleigh–Taylor instability: I. Bubble environment 与激光诱导的瑞利-泰勒不稳定性相关的纳米皱纹、压实物和皱纹:1 .气泡环境

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000105

S. Lugomer

{"title":"Nano-wrinkles, compactons, and wrinklons associated with laser-induced Rayleigh–Taylor instability: I. Bubble environment","authors":"S. Lugomer","doi":"10.1017/s0263034620000105","DOIUrl":"https://doi.org/10.1017/s0263034620000105","url":null,"abstract":"We study dynamics, structure and organization of the new paradigm of wavewrinkle structures associated with multipulse laser-induced RayleighTaylor (RT) instability in the plane of a target surface in the circumferential zone ( C -zone) of the spot. Irregular target surface, variation of the fluid layer thickness and of the fluid velocity affect the nonlinearity and dispersion. The fluid layer inhomogeneity establishes local domains arranged (organized) in the «domain network». The traveling wavewrinkles become solitary waves and latter on become transformed into stationary soliton wavewrinkle patterns. Their morphology varies in the radial direction ofaussian-like spot ranging from the compacton-like solitons to the aperiodic rectangular waves (with rounded top surface) and to the periodic ones. These wavewrinkles may be successfully juxtapositioned with the exact solution of the nonlinear differential equations formulated in the KadomtsevPetviashvili sense taking into account the fluid conditions in particular domain. The cooling wave that starts at the periphery by the end of the pulse causes sudden increase of density and surface tension: the wavewrinkle structures become unstable what causes their break-up. The onset of solidification causes formation of an elastic sheet which starts to shrink generating lateral tension on the wavewrinkles. The focusing of energy at the constrained boundary causes the formation of wrinklons as the new elementary excitation of the elastic sheets.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"50 12 1","pages":"101-113"},"PeriodicalIF":0.9,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83399912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Evaluation of electron temperature and electron density of laser-ablated Zr plasma by Langmuir probe characterization and its correlation with surface modifications 用Langmuir探针表征激光烧蚀Zr等离子体的电子温度和电子密度及其与表面修饰的关系

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s026303462000004x

Zul Irfan, S. Bashir, S. Butt, Asma Hayat, R. Ayub, K. Mahmood, M. Akram, Amna Batool

{"title":"Evaluation of electron temperature and electron density of laser-ablated Zr plasma by Langmuir probe characterization and its correlation with surface modifications","authors":"Zul Irfan, S. Bashir, S. Butt, Asma Hayat, R. Ayub, K. Mahmood, M. Akram, Amna Batool","doi":"10.1017/s026303462000004x","DOIUrl":"https://doi.org/10.1017/s026303462000004x","url":null,"abstract":"The plasma parameters of laser-ablated Zirconium (Zr) using a Langmuir probe technique have been investigated by employing a Q-switched Nd:YAG laser (532 nm, 6 ns) at various irradiances ranging from 8.6 to 15.5 GW/cm 2 . All the measurements have been performed under an ultra-high vacuum condition while keeping the probe at a fixed distance of 4 mm from the target. By varying the biasing voltages from 1 to 75 V, the corresponding values of electric currents are measured by the probe on the oscilloscope. Laser-induced Zr plasma parameters such as electron temperature, electron number density, plasma potential, Debye length, and thermal velocity have been evaluated from I–V characteristic curves of Langmuir probe data. It is found that both the electron temperature and thermal velocity of Zr plasma reveal an increasing trend from 18 to 41 eV and 2.8 × 10 8 to 4.3 × 10 8 cm/s, respectively, with increasing laser irradiance which is attributed to more energy deposition and enhanced ablation rate. However, the electron number density of Zr plasma exhibits a non-significant increase from 6.5 × 10 14 to 6.7 × 10 14 cm −3 with increasing irradiance from 8.6 to 10.9 GW/cm 2 . A further increase in irradiance from 12 to 15.5 GW/cm 2 causes a reduction in the number density of Zr plasma from 6.1 × 10 14 to 5.6 × 10 14 cm −3 which is attributed to the formation of thick sheath, ambipolar electric field, and laser-supported detonation waves (Shock front). Scanning electron microscope analysis has been performed to reveal the surface morphology of irradiated Zr. It reveals the formation of cracks, ridges, cones, and grains. It was observed at high irradiances the ridges are vanished, whereas cones and cracks are dominant features. By controlling plasma parameters, surface structuring of materials can be controlled, which has a vast range of applications in the industry and medicine.","PeriodicalId":49925,"journal":{"name":"Laser and Particle Beams","volume":"58 1","pages":"84-93"},"PeriodicalIF":0.9,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83462241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bernstein mode acceleration of electrons in a magnetic mirror 磁镜中电子的伯恩斯坦模式加速

IF 0.9 4区物理与天体物理

Laser and Particle Beams Pub Date : 2020-06-01 DOI: 10.1017/s0263034620000038

Ram Jeet, Asheel Kumar

引用次数: 1