RII Track-4: Experiments on a High Intensity, Coherent Plasma Laser through Stimulated Raman Backscattering

RII Track-4：通过受激拉曼背向散射进行高强度相干等离子体激光器实验

• 批准号: 1833015
• 负责人: Jun Ren
• 金额: $ 18.34万
• 依托单位: Delaware State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1833015&HistoricalAwards=false
• 关键词: RII; Track; Experiments; Intensity; Coherent

Nontechnical DescriptionA laser (Light Amplification by Stimulated Emission of Radiation) is essentially an amplifier, whose operation depends on pumping energy into the electrons of atoms in a gas, liquid, or solid substance called the lasing medium. The production of very high-power (on the order of a few billion watts), ultra-short (a few billionth of a second) laser pulses places stringent demands on the lasing medium. Scientists have used elegant optical techniques and plasmas (ionized gas) that can operate at extreme intensities to develop high-power pulsed lasers. However, further advancement requires understanding processes within the amplifying medium and overcoming technological challenges that limit the output power. This project focuses on achieving increased output power of plasma based ultrafast lasers by combining the expertise and instrumentation available at Delaware State University with those of the Lawrence Livermore National Laboratory (LLNL). The fellowship grant from the National Science Foundation (NSF) Established Program to Stimulate Competitive Research (EPSCoR) provides the Principal Investigator (PI) and her students the support needed to pursue an integrated effort involving experiments, theory, and simulations. The project offers a unique opportunity for an early career researcher and students from Delaware State University, a member of the Historically Black Colleges and Universities (HBCU), to train at a premier national facility in building a table-top high-power plasma laser. Technical DescriptionThe goal of this EPSCoR Research Fellowship is to achieve ultrashort (20-30 femtosecond) pulses at petawatt/exawatt/zettawatt peak power in a table-top plasma-based laser. The experiments will use Stimulated Raman Backscattering (SRBS), in which amplification of a seed laser pulse power occurs via excited plasma Langmuir waves in a configuration of counter-propagating pump and seed beams. The seed laser will be shipped from Delaware State University and the experiments will be performed at the Lawrence Livermore National Laboratory (LLNL) using a pump laser available at LLNL's Jupiter Laser Facility (JLF). The project involves the installation of the seed laser, development of a plasma waveguide and studies of its characteristics, implementation of a single stage SRBS experiment pumped by a JLF laser, and finally a two stage (two gas jets) experiment. These experiments will explore the saturation mechanism predicted by the particle in cells (PIC) simulations by the PI's group and use an integrated effort that combines theoretical analysis, simulations, and experimental investigation to address the peak power saturation in plasma-based high-power lasers. The project provides a unique opportunity for the PI and her students to combine home institution's instrumentation with those available at large scale national facilities to conduct experiments that are guided by theory and simulation, and in turn provide useful feedback to validate and help improve theoretical models.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述激光器（通过刺激的辐射发射通过光放大）本质上是一个放大器，其操作取决于在气体，液体或固体物质中将能量泵送到原子的电子中，称为激光介质。 高功率的产生（以数十亿瓦的量为单位），超短（几十亿秒）激光脉冲对激光介质提出了严格的需求。 科学家使用了优雅的光学技术和等离子体（电离气体），可以在极端强度下运行以开发高功率脉冲激光器。 但是，进一步的进步需要在放大媒介和克服限制输出功率的技术挑战中理解过程。该项目着重于通过将特拉华州立大学可用的专业知识和仪器与劳伦斯·利弗莫尔国家实验室（LLNL）的专业知识和仪器相结合，从而实现了基于等离子体的超快激光器的产量。 国家科学基金会（NSF）建立的兴奋竞争研究计划（EPSCOR）的奖学金赠款为主要研究者（PI）及其学生提供了涉及实验，理论和模拟的综合努力所需的支持。 该项目为早期的职业研究员和特拉华州立大学的学生（历史悠久的黑人学院和大学（HBCU））提供了一个独特的机会，可以在一家总理国家设施进行培训，以建立一个台式高功率等离子体激光。技术描述该EPSCOR研究奖学金的目标是在Petawatt/Exawatt/exetawatt/Zettawatt峰值功率上实现超短量（20-30飞秒）脉冲。该实验将使用刺激的拉曼反向散射（SRB），其中种子激光脉冲功率通过激发的等离子体Langmuir波在反向传播泵和种子梁的配置中进行。 种子激光器将从特拉华州立大学运送，实验将在LLNL的木星激光设施（JLF）上使用劳伦斯·利弗莫尔国家实验室（LLNL）进行。 该项目涉及种子激光器的安装，离子波导的开发及其特征的研究，实施了由JLF激光泵送的单阶段SRB实验，最后是两个阶段（两个燃气JETS）实验。这些实验将探索PI组粒子（PIC）模拟中粒子预测的饱和机制，并使用集成的努力将理论分析，模拟和实验研究结合在一起，以解决基于等离子的高功率激光器中的峰值功率饱和。 该项目为PI和她的学生提供了一个独特的机会，可以将家庭机构的仪器与大型国家设施可用的仪器相结合，以进行由理论和模拟所指导的实验，进而提供有用的反馈来验证和改善理论模型。该奖项反映了NSF的法定任务，并通过使用基金会的智能效果来评估了NSF的法定任务，并具有值得的支持。

项目成果

Raman spectral analyses of amino acids in life processes

• DOI: 10.1117/12.2509883
• 发表时间: 2019-02
• 作者: Lianxin Xin;J. Hou;Aleem Sayles;Jian Zhao;A. Marcano;Hui Xia;Jun Ren

Resonant Energy Transfer, with Creation of Hyper-Excited Atoms, and Molecular Auto-Ionization in a Cold Rydberg Gas

共振能量转移，产生超激发原子，以及冷里德堡气体中的分子自电离

• DOI: 10.4236/jmp.2021.129074
• 发表时间: 2021
• 期刊: Journal of Modern Physics
• 作者: Rasamny, Marwan;Martinez, Alan;Xin, Lianxin;Ren, Jun;Zerrad, Essaid
• 通讯作者: Zerrad, Essaid

Exact Topological Soliton Solutions to the Strongly Perturbed Family of Sine-Gordon Type Equations

正弦-戈登型方程组的强扰动族的精确拓扑孤子解

• DOI: 10.4236/jamp.2019.710163
• 发表时间: 2019
• 期刊: Journal of Applied Mathematics and Physics
• 作者: Johnson, Stephen;Zerrad, Essaid;Makrogiannis, Sokratis;Ren, Jun
• 通讯作者: Ren, Jun

The penetration and movement of nanoparticles on membrane

纳米颗粒在膜上的渗透和运动

• DOI: 10.1117/12.2544321
• 发表时间: 2020
• 期刊: and Molecular Probes for Biomedical Applications XII
• 作者: Xin, Lianxin;Wang, Zixuan;Zhao, Jian;Tylor, Zachary B.;Boukari, Hacene;Zerrad, Essaid;Ren, Jun
• 通讯作者: Ren, Jun