Molecular Dynamics in Ultrastrong Laser Fields.

超强激光场中的分子动力学。

• 批准号: 2110462
• 负责人: Barry Walker
• 金额: $ 29.62万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2110462&HistoricalAwards=false
• 关键词: Molecular; Dynamics; Ultrastrong; Laser; Fields.

Frontier research in high intensity laser science is the basis of this work. Both a high intensity laser laboratory capable of creating trillion-watt peak powers and a theory effort to model the dynamics of the laser-matter interaction will be conducted with the funding. Atoms and molecules form the building blocks of matter; molecules by far comprise nearly every material we use on a daily basis. Due to the extensive presence of molecules, this research will specifically focus on understanding the interactions of high intensity lasers with matter in the molecular form. An understanding of highly energetic molecular states is expected as well as the connection between atoms and molecules when interacting with lasers. The work involves intensive, hands-on training and funding for the STEM (science, technology, engineering, and math) disciplines at the undergraduate, graduate, and post-graduate level. Training will involve transferable abilities into highly skilled, global workforce areas including: lasers and optics, electrical and mechanical engineering, computer modeling, laboratory research, and management of research groups. The work will quantify how the molecules are excited by intense lasers well beyond traditional intensities of 1 PW/cm^2. The experimental and theory studies will extend up to the ultrastrong fields and intensities of 10,000 PW/cm^2. The ion fragments have charge states extending beyond the electrons involved in molecular bonding, deep into the atomic structure. The energies of the electrons from these interactions extend from 10,000 eV to 1,000,000 eV. The broad scientific question involves how ultrastrong laser fields interact with molecules. The work bridges an important gap between the physics of individual atoms and the many body collective effects in plasmas and condensed matter. This proposed research will extend the molecule – laser interaction into ultrastrong fields. In this new regime forces and energies are thousands of times greater than for current molecular studies. The mechanisms for the formation of high charge states and the energetics of the molecular fragments will be quantified experimentally and modeled theoretically. Students from the group have secured employment into significant positions across science and technology disciplines from national defense contracting to medical physics to laser materials processing industry. The grant will fund a post-graduate training position specifically designed to help train recent graduates, especially underrepresented demographics, for challenges that can occur in the scientific workplace.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.

强激光科学前沿研究是本课题的基础。一个能够产生万亿瓦峰值功率的高强度激光实验室和一个模拟激光与物质相互作用动力学的理论工作都将利用这笔资金进行。原子和分子构成了物质的基本组成部分;到目前为止，分子几乎构成了我们日常使用的每一种材料。由于分子的广泛存在，这项研究将特别侧重于了解高强度激光与分子形式物质的相互作用。高能量的分子状态的理解，以及原子和分子之间的连接时，与激光相互作用的预期。这项工作涉及强化，动手培训和资助的STEM（科学，技术，工程和数学）学科在本科，研究生和研究生水平。培训将涉及高技能的全球劳动力领域的可转移能力，包括：激光和光学，电气和机械工程，计算机建模，实验室研究和研究小组的管理。这项工作将量化分子是如何被远远超过传统强度1 PW/cm^2的强激光激发的。实验和理论研究将扩展到10，000 PW/cm ^2的超强场和强度。离子碎片的电荷状态超出了分子键合中的电子，深入到原子结构中。这些相互作用产生的电子能量从10，000 eV扩展到1，000，000 eV。广泛的科学问题涉及超强激光场如何与分子相互作用。这项工作弥合了单个原子物理学与等离子体和凝聚态物质中许多身体集体效应之间的重要差距。这项研究将把分子-激光相互作用扩展到超强场.在这个新的体系中，力和能量是目前分子研究的数千倍。高电荷态的形成机制和分子碎片的能量学将通过实验进行量化并在理论上建模。该集团的学生已获得就业机会，从国防承包到医学物理到激光材料加工行业的科学和技术学科的重要职位。该补助金将资助一个研究生培训职位，专门用于帮助培训应届毕业生，特别是代表性不足的人口，以应对科学工作场所可能发生的挑战。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

项目成果

Polarizability, Stark shifts, and field ionization of highly charged ions in ultraintense lasers

超强激光中高电荷离子的极化率、斯塔克位移和场电离

• DOI: 10.1103/physreva.107.033102
• 发表时间: 2023
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Jones, Evan C.;Andreula, Zachery P.;Walker, Barry C.
• 通讯作者: Walker, Barry C.

Ionization Dynamics for Atomic and Molecular Ions in Relativistic, Ultrastrong Laser Fields

相对论性超强激光场中原子和分子离子的电离动力学

• DOI: 10.1088/1742-6596/2494/1/012018
• 发表时间: 2023
• 期刊: Journal of Physics: Conference Series
• 作者: Walker, B C;Jones, E C;Andreula, Z;Pham, M;Gale, M;Pedlow, E;Stein, A
• 通讯作者: Stein, A

Inner shell excitation by strong field laser rescattering: optimal laser conditions for high energy recollision

强场激光再散射激发内壳：高能再碰撞的最佳激光条件

• DOI: 10.1364/josab.440211
• 发表时间: 2021
• 期刊: Journal of the Optical Society of America B
• 作者: Kelley, L.;Germain, Z.;Jones, E. C.;Milliken, D.;Walker, Barry C.
• 通讯作者: Walker, Barry C.