Laser Plasma Interactions in MegaGauss Magnetic Fields

兆高斯磁场中的激光等离子体相互作用

• 批准号: 1903355
• 负责人: Vladimir Ivanov
• 金额: $ 40万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903355&HistoricalAwards=false
• 关键词: Laser; Plasma; Interactions; MegaGauss; Magnetic

Stars, galaxies, and nebulae in the universe consist of matter in a plasma state. Magnetic fields dramatically impact properties of plasma. Magnetic fields are thought to be responsible for catastrophic cosmic events such as generation of super-strong x-ray bursts by collapsing stars and explosion of solar flares. Understanding of plasma in strong magnetic fields is important for astrophysics, basic plasma physics, and energy and national defense applications. A unique combination of the Mega-Ampere current generator and powerful short-pulse laser at the University of Nevada, Reno allows to investigate plasmas in magnetic fields that are millions of times stronger that the Earth's magnetic field. In this project, the impact of strong magnetic fields on high-energy beams of electrons, and proton beams generated by the powerful laser in a solid target will be studied. In collaboration with the University of Rochester, three graduate students will be trained and will perform experimental and theoretical work.Electron transport in the solid laser target will be studied in the axial magnetic field of 1-1.5 MGauss. The pulsed power generator provides well measured and controlled magnetic fields. Coherent transient radiation from the rear side of the target will illuminate a spot of the electron beam and indicate a guiding and focusing effect in the magnetic field. Enhanced generation of proton beams in the external magnetic field will be studied with the same experimental configuration combining laser and pulsed power capabilities. A "proof of principle" experiment will be performed at the magnetic field of ~1.5 MGauss. The experimental program will be supported by simulations of electron and proton beams in a strong longitudinal magnetic field using hybrid particle-in-cell codes. Results of the project are relevant to the "fast ignition" approach to inertial confinement fusion and for medical applications. This project is jointly funded by the Division of Physics and the Established Program to Stimulate Competitive Research (EPSCoR).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.

宇宙中的恒星、星系和星云是由等离子体状态的物质组成的。磁场极大地影响了等离子体的性质。磁场被认为是灾难性宇宙事件的罪魁祸首，如恒星坍塌产生超强X射线爆发和太阳耀斑爆炸。了解强磁场中的等离子体对于天体物理、基础等离子体物理以及能源和国防应用具有重要意义。雷诺是内华达大学的兆安电流发生器和强大的短脉冲激光的独特组合，它允许研究磁场中的等离子体，磁场的强度是地球磁场的数百万倍。在这个项目中，将研究强磁场对高能电子束的影响，以及强激光在固体靶中产生的质子束。与罗彻斯特大学合作，将培训三名研究生并进行实验和理论工作。将在1-1.5MGauss的轴向磁场中研究固体激光靶中的电子输运。脉冲功率发生器提供了测量和控制良好的磁场。来自目标背面的相干瞬变辐射将照射电子束的一个斑点，并指示磁场中的引导和聚焦效应。在相同的实验配置下，结合激光和脉冲功率能力，将研究在外部磁场中增强质子束的产生。将在~1.5MGauss的磁场下进行“原理证明”实验。该实验计划将由使用混合粒子单元编码的强纵向磁场中的电子束和质子束的模拟来支持。该项目的结果与惯性约束聚变的“快速点火”方法和医学应用有关。该项目由物理部和已建立的激励竞争性研究计划(EPSCoR)共同资助。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Study of laser-driven magnetic fields with a continuous wave Faraday rotation diagnostic

通过连续波法拉第旋转诊断研究激光驱动磁场

• DOI: 10.1063/1.5141753
• 发表时间: 2020
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: Ivanov, V. V.;Maximov, A. V.;Astanovitskiy, A. L.;Begishev, I. A.;Betti, R.;Davies, J. R.;Mileham, C.;Moody, J. D.;Stoeckl, C.;Swanson, K. J.
• 通讯作者: Swanson, K. J.

Quadratic Zeeman effect in hydrogen at 2–3 MG magnetic fields

2-3 MG 磁场下氢气中的二次塞曼效应

• DOI: 10.1103/physreve.106.045206
• 发表时间: 2022
• 期刊: Physical Review E
• 影响因子: 2.4
• 作者: Ivanov, V. V.;Mancini, R. C.;Huerta, N. A.;Swanson, K. J.;Winget, D. E.;Montgomery, M. H.;Golovkin, I. E.;Hariharan, H. K.;Berbel, Z. S.
• 通讯作者: Berbel, Z. S.

Generation of strong magnetic fields for magnetized plasma experiments at the 1-MA pulsed power machine

• DOI: 10.1063/5.0042863
• 发表时间: 2021-07-01
• 期刊: MATTER AND RADIATION AT EXTREMES
• 影响因子: 5.1
• 作者: Ivanov, V. V.;Maximov, A., V;Huerta, N. A.
• 通讯作者: Huerta, N. A.