光电电子源微透镜阵列Laser横向整形技术
Microlens Array Laser Transverse Shaping Technique for Photoemission Electron Source
摘要：
在电子加速器中使用的光发射电子源中遇到的一个常见问题是由于在放大的所有阶段的非理想条件而导致的激光光斑的失真。在阴极处的这种激光光斑可能产生不对称的带电光束，这将导致由于加速的早期阶段的空间电荷而导致的光束质量的劣化，并且不能最佳地利用阴极表面。本文研究了在费米加速器科学技术（FAST）和阿贡尾场加速器（AWA）上使用微透镜阵列来显著改善紫外光电阴极上驱动激光脉冲横向均匀性的可能性。特别是，我们讨论了在光阴极的均匀性和周期性图案形成的实验表征。最后将实验结果与近轴分析、光线追迹和波前传播软件进行了比较。
英文摘要：
A common issue encountered in photoemission electron sources used in electron accelerators is distortion of the laser spot due to non ideal conditions at all stages of the amplification. Such a laser spot at the cathode may produce asymmetric charged beams that will result in degradation of the beam quality due to space charge at early stages of acceleration and fail to optimally utilize the cathode surface. In this note we study the possibility of using microlens arrays to dramatically improve the transverse uniformity of the drive laser pulse on UV photocathodes at both Fermilab Accelerator Science \& Technology (FAST) facility and Argonne Wakefield Accelerator (AWA). In particular, we discuss the experimental characterization of the homogeneity and periodic patterned formation at the photocathode. Finally, we compare the experimental results with the paraxial analysis, ray tracing and wavefront propagation software.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
