Femtosecond electron microscopy of relativistic electron bunches

Yang Wan; Sheroy Tata; Omri Seemann; Eitan Y. Levine; Slava Smartsev; Eyal Kroupp; Victor Malka

doi:10.1038/s41377-023-01142-1

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Femtosecond electron microscopy of relativistic electron bunches

Original Articles

- Femtosecond electron microscopy of relativistic electron bunches
- Femtosecond electron microscopy of relativistic electron bunches
- 光：科学与应用 2023年12卷第6期页码：1010-1019
- Affiliations：
  
  Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel
- Author bio：
  
  Yang Wan (yang.wan@weizmann.ac.il)
- Funds：
- DOI：10.1038/s41377-023-01142-1
  中图分类号：
- 纸质出版日期：2023-6-30，
  
  网络出版日期：2023-5-11，
  
  收稿日期：2022-8-31，
  
  修回日期：2023-3-15，
  
  录用日期：2023-3-30
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Femtosecond electron microscopy of relativistic electron bunches[J]. 光：科学与应用, 2023,12(6):1010-1019.

Wan, Y. et al. Femtosecond electron microscopy of relativistic electron bunches. Light: Science & Applications, 12, 1010-1019 (2023).
Femtosecond electron microscopy of relativistic electron bunches[J]. 光：科学与应用, 2023,12(6):1010-1019. DOI： 10.1038/s41377-023-01142-1.

Wan, Y. et al. Femtosecond electron microscopy of relativistic electron bunches. Light: Science & Applications, 12, 1010-1019 (2023). DOI： 10.1038/s41377-023-01142-1.

摘要

Abstract

The development of plasma-based accelerators has enabled the generation of very high brightness electron bunches of femtosecond duration

micrometer size and ultralow emittance

crucial for emerging applications including ultrafast detection in material science

laboratory-scale free-electron lasers and compact colliders for high-energy physics. The precise characterization of the initial bunch parameters is critical to the ability to manipulate the beam properties for downstream applications. Proper diagnostic of such ultra-short and high charge density laser-plasma accelerated bunches

however

remains very challenging. Here we address this challenge with a novel technique we name as

femtosecond ultrarelativistic electron microscopy

which utilizes an electron bunch from another laser-plasma accelerator as a probe. In contrast to conventional microscopy of using very low-energy electrons

the femtosecond duration and high electron energy of such a probe beam enable it to capture the ultra-intense space-charge fields of the investigated bunch and to reconstruct the charge distribution with very high spatiotemporal resolution

all in a single shot. In the experiment presented here we have used this technique to study the shape of a laser-plasma accelerated electron beam

its asymmetry due to the drive laser polarization

and its beam evolution as it exits the plasma. We anticipate that this method will significantly advance the understanding of complex beam-plasma dynamics and will also provide a powerful new tool for real-time optimization of plasma accelerators.

关键词

Keywords

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