CAREER: Coherent Laser Control for Compact Accelerators

职业：紧凑型加速器的相干激光控制

• 批准号: 1753165
• 负责人: Franklin Dollar
• 金额: $ 68万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1753165&HistoricalAwards=false
• 关键词: CAREER; Coherent; Laser; Control; Compact

This CAREER award will support a study of how to enhance performance of laser-driven particle accelerators by controlling laser properties such as the focal spot quality. Using techniques that enable the laser light to be manipulated and coherently controlled, high brightness compact accelerators may become achievable on a single tabletop, with immediate applications in medical isotope production and radiography. The research is highly integrated with mentoring, professional development, and outreach, which are employed to train students practical skill sets to prepare them for a range of technical careers. The education plan will utilize culturally relevant frameworks for engaging underrepresented populations, providing hands-on skill set development, and empowering the students themselves to increase visibility of accelerator science as a discipline. Femtosecond lasers are ideally suited for use as tabletop particle accelerators since their short pulse duration enables relativistic intensities to be generated at high repetition rates. With sufficient intensity, a laser can redistribute electrons within optical cycles, generating enormous acceleration gradients which can drive advanced accelerators. Though early analytical models showed promise of GeV ions and hundreds of GeV electrons, experiments have yet to produce such beams. This CAREER award will enable experiments shaping the wavefront and modifying the polarization of femtosecond lasers towards development of practical tabletop accelerators. Influence of higher order modes for increased charge and decreased beam divergence will be studied, with machine learning providing insight into the respective influence of each mode in these highly nonlinear regimes. Numerical modeling of the interactions will be performed utilizing large data samples and exactly measured beam properties.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.

该职业奖将支持如何通过控制激光特性（如焦斑质量）来提高激光驱动粒子加速器性能的研究。 使用使激光能够被操纵和相干控制的技术，高亮度紧凑型加速器可以在单个桌面上实现，并立即应用于医学同位素生产和放射照相。该研究与指导，专业发展和推广高度整合，用于培训学生的实用技能，为他们的一系列技术职业做好准备。该教育计划将利用文化相关的框架来吸引代表性不足的人群，提供实践技能的发展，并使学生自己能够提高加速器科学作为一门学科的知名度。 飞秒激光器非常适合用作桌面粒子加速器，因为它们的短脉冲持续时间能够以高重复率产生相对论强度。在足够的强度下，激光可以在光学周期内重新分配电子，产生巨大的加速梯度，可以驱动先进的加速器。虽然早期的分析模型显示出了GeV离子和数百个GeV电子的前景，但实验还没有产生这样的光束。 这个职业奖将使实验整形波前和修改飞秒激光器的偏振走向实用的桌面加速器的发展。 将研究高阶模式对增加电荷和降低光束发散度的影响，机器学习将深入了解这些高度非线性区域中每种模式的各自影响。该奖项反映了NSF的法定使命，并已被认为是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的支持。

项目成果

The effects of laser polarization and wavelength on injection dynamics of a laser wakefield accelerator

• DOI: 10.1063/5.0051125
• 发表时间: 2021-06
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: Yong Ma;D. Seipt;A. Hussein;S. Hakimi;N. Beier;S. Hansen;J. Hinojosa;A. Maksimchuk;J. Nees;K. Krushelnick;A. Thomas;F. Dollar

Few Cycle EUV Continuum Generation via Thin Film Compression

通过薄膜压缩实现少周期 EUV 连续谱生成

• 发表时间: 2020
• 期刊: Conference on Lasers and Electro-Optics
• 作者: Stanfield, M.;Beier, N.;Hakimi, S.;Hussein, A. E.;Dollar, F.
• 通讯作者: Dollar, F.

Two-color high-harmonic generation from relativistic plasma mirrors.

• DOI: 10.1103/physreve.108.015201
• 发表时间: 2023-07
• 期刊: Physical review. E
• 作者: N. Beier;F. Dollar