1 中国科学技术大学物理学院，安徽 合肥 230026
2 中国科学院上海光学精密机械研究所，强场激光物理国家重点实验室，中国科学院超强激光科学卓越中心，上海 201800
3 扬州大学物理科学与技术学院，江苏 扬州 225009
4 上海科技大学物质科学与技术学院，上海 200031
逆康普顿散射源是利用高能电子束和强激光对撞产生高能辐射的光源。传统电子加速器作为电子源的逆康普顿散射源体积庞大，难以推广。而新型的激光等离子体电子加速器具有更高的加速梯度，具备小型化的发展潜力。全光逆康普顿散射源就是一种基于激光等离子体电子加速器实现的小型化高能辐射源，具有更短脉宽、更高亮度的辐射输出，应用前景十分广阔。首先，总结了全光逆康普顿散射源在提高亮度、能量和单能性等方面的优化研究进展，并分析了设计重点；最后，介绍了全光逆康普顿散射源在基础科学研究、工业和生物医学领域的典型应用。
超快激光 激光等离子体电子加速 全光逆康普顿散射源 新型辐射源
强激光与粒子束
2022, 34(10): 104009
Author Affiliations
Abstract
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Department of Physics, SUPA and University of Strathclyde, Glasgow G4 0NG, UK
4 IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
5 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
Real-time single-shot measurement of the femtosecond electron beam duration in laser wakefield accelerators is discussed for both experimental design and theoretical analysis that combines polarimetry and interferometry. The probe pulse polarization is rotated by the azimuthal magnetic field of the electron beam and then introduced into a Michelson-type interferometer for self-interference. The electron beam duration is obtained from the region size of the interference fringes, which is independent of the pulse width of the probe laser. Using a larger magnification system or incident angle, the measurement resolution can be less than 1 fs.
120.5410 Polarimetry 350.5400 Plasmas 120.3180 Interferometry Chinese Optics Letters
2018, 16(7): 071202
Author Affiliations
Abstract
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
4 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
5 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
Beam quality degradation during the transition from a laser wakefield accelerator to the vacuum is one of the reasons that cause the beam transport distortion, which hinders the way to compact free-electron-lasers. Here, we performed transition simulation to initialize the beam parameters for beam optics transport. This initialization was crucial in matching the experimental results and the designed evolution of the beamline. We experimentally characterized properties of high-quality laser-wakefield-accelerated electron beams, such as transverse beam profile, divergence, and directionality after long-distance transport. By installing magnetic quadrupole lenses with tailored strength gradients, we successfully collimated the electron beams with tunable energies from 200 to 600 MeV.
020.2649 Strong field laser physics 110.2970 Image detection systems Chinese Optics Letters
2018, 16(4): 040201
