Image of the transverse bunch profile via coherent optical transition radiation

Потылицын, А. П.; Сухих, Л.; Gusvitskii, Todor; Kube, G.; Novokshonov, Artem

doi:10.1103/physrevaccelbeams.23.042804

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…From the experimental electron energy spectra, we obtained γ j with weight χ j . The field point-spread function (FPSF) 66 can be calculated as . In OTR calculation, we used the θ m in the second stage of the imaging since it was smaller than the acceptance angle of OAP1 in the first stage.…”

Section: Resultsmentioning

confidence: 99%

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

Huang,

Jin,

Nakanii

et al. 2024

Light Sci Appl

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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.

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Section: Resultsmentioning

confidence: 99%

“…With an arbitrary transverse electron profile , the relative COTR intensity is calculated by where denotes convolution. In a previous study 66 , a relation was reported using a single Gaussian (“1 Gauss”) distribution: . A and B are constants.…”

Section: Resultsmentioning

confidence: 99%

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

Huang,

Jin,

Nakanii

et al. 2024

Light Sci Appl

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show abstract

“…Refs. [38,39,40] and the references therein), the knowledge of the emission wavelength down to the 10 nanometer level is by far sufficient. In this case Cherenkov radiation could be an interesting alternative due to the monochromatic emission and the comparatively high radiation intensity.…”

Section: Summary and Discussionmentioning

confidence: 99%