Single-Shot Electro-Optic Sampling on the Temporal Structure of Laser Wakefield Accelerated Electrons

Kai Huang,Nobuhiko Nakanii,Masaki Kando,Michiaki Mori,Hideyuki Kotaki,Yukio Hayashi

doi:10.3390/cryst10080640

Kai Huang, Nobuhiko Nakanii + Show 4 more

Open Access

https://doi.org/10.3390/cryst10080640

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Abstract

Particle acceleration driven by a high power Ti: sapphire laser has invoked great interest worldwide because of the ultrahigh acceleration gradient. For the aspect of electron acceleration, electron beams with energies over GeV have been generated using the laser wakefield acceleration mechanism. For the optimization of the electron generation process, real-time electron parameter monitors are necessary. One of the key parameters of a high energy particle beam is the temporal distribution, which is closely related with the timing resolution in a pump-probe application. Here, we introduced the electro-optic sampling method to laser wakefield acceleration. Real-time multibunch structures were observed. Careful calculations on the physical processes of signal generation in an electro-optic crystal were performed. Discussions of the methodology are elaborated in detail.

Highlights

Chirped pulse amplification (CPA) [1], which was awarded the 2018 Nobel Prize in physics, is a revolutionary technology for the generation of high power lasers
EO spatial decoding method to laser wakefield acceleration (LWFA), one should keep in mind that there is always high power laser.decoding
This method, the factors that limit the timing resolution should be kept in mind

Summary

Introduction

Chirped pulse amplification (CPA) [1], which was awarded the 2018 Nobel Prize in physics, is a revolutionary technology for the generation of high power lasers. By focusing a high power laser to a spot size of a micrometer, the intensity exceeds 1022 W/cm2 [3] with the J-KAREN-P laser [4] in the Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), Japan. With such an ultrahigh intensity, the electron motion become ultrarelativistic and very interesting physics have been studied [5,6]. One of the most attractive applications of such ultrashort intense lasers is the laser-driven particle acceleration.

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