Laser matter interactions

激光物质相互作用

• 批准号: RGPIN-2019-04180
• 负责人: Rozmus, Wojciech
• 金额: $ 2.48万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=737467
• 关键词: Laser; matter; interactions

This proposal requests funding for the ongoing theoretical and numerical studies of laser matter interactions in different physical systems and for a wide range of parameters. The interactions between intense laser beams and plasmas have broad and far reaching applications in applied and fundamental sciences. The enabling method of the ultrashort and intense laser pulse generation has been recognized by the 2018 Nobel prize in physics. Our research methodology combines analytical theories with large scale numerical simulations and involves close collaborations with several international experimental groups. The inertial confinement fusion (ICF) is considered a possible future energy source and research on ICF has led over the years to numerous breakthroughs in laser technology and laser plasma sciences. Our contributions to ICF studies have been related to the interaction physics and transport theory and will be further advanced in the proposed program. The laboratory astrophysics and high energy density plasmas. Matter whose energy density corresponds to thermal pressure above 1 Mbar belongs to the field of high energy density. Such plasmas exhibit properties that overlap with systems known from astronomy and astrophysics, e.g. planetary interiors, stars and early universe. Compressed targets in ICF experiments are also in this regime. Laboratory astrophysics includes also many general processes that are ubiquitous in astrophysics, for example collisionless shocks. These processes will be modelled in our group using particle-cell-code. The laser plasmas as optical systems, particle accelerators and laser amplifiers. Ability of the plasma to sustain large gradients of the electric fields has been explored for some time in the laser wake field accelerators (LWFA). We will investigate different aspects of the LWFA with the aim of improving accelerator schemes in terms of stability, energy and numbers of accelerated electrons. Properties of laser plasmas as an active medium that can sustain large electromagnetic fields and support collective modes have been explored in various schemes aiming at laser pulse amplification and compression. They will be studied in the proposed program. We will also study different realizations of the pump probe schemes in which laser plasma are used as optical systems operating at laser intensities many orders of magnitude beyond the breaking point of the traditional optics. The laser light scattering methods for the identification and sorting of biological cells. In this ongoing collaborative research program between the medical, engineering and my group providing numerical and theoretical support for these studies we propose to use laser light scattering for the characterization and discrimination of blood cells. And in particular we will apply this technique for the identification and purification of adult stem cells for diagnosis and stem cell-based therapies.

该提案要求为正在进行的不同物理系统中激光物质相互作用的理论和数值研究以及广泛的参数提供资金。强激光与等离子体的相互作用在应用科学和基础科学中有着广泛而深远的应用。超短强激光脉冲产生的使能方法获得了2018年诺贝尔物理学奖的认可。我们的研究方法将分析理论与大规模数值模拟相结合，并与几个国际实验小组密切合作。 惯性约束聚变（ICF）被认为是一种可能的未来能源，多年来对ICF的研究导致了激光技术和激光等离子体科学的许多突破。我们对ICF研究的贡献与相互作用物理和输运理论有关，并将在拟议的计划中进一步推进。 实验室天体物理与高能密度等离子体。物质的能量密度对应于1毫巴以上的热压力属于高能量密度领域。这种等离子体表现出与天文学和天体物理学已知的系统重叠的性质，例如行星内部，恒星和早期宇宙。ICF实验中的压缩靶也属于这种情况。实验室天体物理学还包括许多在天体物理学中普遍存在的一般过程，例如无碰撞冲击。这些过程将在我们的小组中使用粒子细胞代码进行建模。 激光等离子体作为光学系统、粒子加速器和激光放大器。在激光尾流场加速器中，等离子体维持大梯度电场的能力已经被探索了一段时间。我们将研究LWFA的不同方面，目的是在稳定性，能量和加速电子的数量方面改进加速器方案。激光等离子体作为一种活性介质，可以维持大的电磁场和支持集体模式的属性已经在各种方案中探索，旨在激光脉冲放大和压缩。他们将在拟议的计划中进行研究。我们还将研究不同的实现的泵浦探测计划，其中激光等离子体被用作光学系统的激光强度超过传统光学的断点许多数量级的操作。 激光散射法用于生物细胞的鉴定和分选。在医学，工程和我的小组之间正在进行的合作研究计划中，为这些研究提供数值和理论支持，我们建议使用激光散射来表征和区分血细胞。特别是，我们将应用这种技术来鉴定和纯化成体干细胞，用于诊断和干细胞治疗。