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Electro-optic 3D snapshot of a laser wakefield accelerated kilo-ampere electron bunch

Authors :
Kai Huang
Zhan Jin
Nobuhiko Nakanii
Tomonao Hosokai
Masaki Kando
Source :
Light: Science & Applications, Vol 13, Iss 1, Pp 1-12 (2024)
Publication Year :
2024
Publisher :
Nature Publishing Group, 2024.

Abstract

Abstract Laser wakefield acceleration, as an advanced accelerator concept, has attracted great attentions for its ultrahigh acceleration gradient and the capability to produce high brightness electron bunches. The three-dimensional (3D) density serves as an evaluation metric for the particle bunch quality and is intrinsically related to the applications of an accelerator. Despite its significance, this parameter has not been experimentally measured in the investigation of laser wakefield acceleration. We report on an electro-optic 3D snapshot of a laser wakefield electron bunch at a position outside the plasma. The 3D shape of the electron bunch was detected by simultaneously performing optical transition radiation imaging and electro-optic sampling. Detailed 3D structures to a few micrometer levels were reconstructed using a genetic algorithm. The electron bunch possessed a transverse size of less than 30 micrometers. The current profile shows a multi-peak structure. The main peak had a duration of < 10 fs and a peak current > 1 kA. The maximum electron 3D number density was ~ 9 × 1021 m -3. This research demonstrates a feasible way of 3D density monitoring on femtosecond kilo-ampere electron bunches, at any position of a beam transport line for relevant applications.

Details

Language :
English
ISSN :
20477538
Volume :
13
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Light: Science & Applications
Publication Type :
Academic Journal
Accession number :
edsdoj.46108ddc25ba4b92a29448ccc377a0ac
Document Type :
article
Full Text :
https://doi.org/10.1038/s41377-024-01440-2