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.

高强度激光科学领域的边界研究是这项工作的基础。高强度激光实验室都能够创建万亿瓦的峰值能力，也可以通过资助来进行建模激光 - 物质相互作用的动力学的理论。原子和分子构成物质的基础；分子几乎完成了我们每天使用的几乎所有材料。由于分子的广泛存在，这项研究将特别集中在理解高强度激光器与分子形式的物质的相互作用。在与激光相互作用时，预期对高能分子状态以及原子和分子之间的联系有所了解。这项工作涉及本科，研究生和研究生水平的STEM（科学，技术，工程和数学）学科的深入，动手培训和资金。培训将涉及可转让能力到高技能的全球劳动力领域，包括：激光和光学，电气和机械工程，计算机建模，实验室研究以及研究小组的管理。这项工作将量化分子如何通过远远超出1 pw/cm^2的传统强度的激光激发分子。实验和理论研究将扩展到10,000 pW/cm^2的超湿场和强度。离子碎片的电荷状态延伸到与分子键合的电子之外，深入原子结构。这些相互作用中电子的能量从10,000 eV扩展到1,000,000 eV。一个广泛的科学问题涉及超局部激光场如何与分子相互作用。这项工作弥合了各个原子的物理学与等离子体和凝结物质的许多身体集体效应之间的重要差距。这项拟议的研究将将分子 - 激光相互作用扩展到超湿场。在这种新的方向力和能量中，比目前的分子研究大了数千倍。形成高电荷态和分子片段能量的机制将进行实验量化并建模理论。该小组的学生已确保从国防签约到医疗物理到激光材料加工行业的科学和技术学科的重要职位。该赠款将资助专门设计的研究生培训职位，以帮助培训最近的毕业生，尤其是代表性不足的人口统计学，以应对科学工作场所可能发生的挑战。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛影响的审查标准来评估的支持。

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.

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.

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