Effective line X-ray generation by chirped femtosecond laser pulses interaction with copper target at local helium flow

A, Garmatina A.; Nazarov, Maxim; Shcheglov, P. A.; Chaschin, M. V.; Aleshkevich, V. A.; Bravy, B. G.; Gordienko, V. M.; Ya, None Panchenko V.

doi:10.21883/eos.2022.04.53728.64-21

Optics and Spectroscopy

2022

DOI: 10.21883/eos.2022.04.53728.64-21

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Effective line X-ray generation by chirped femtosecond laser pulses interaction with copper target at local helium flow

Garmatina A. A

Maxim Nazarov

P. A. Shcheglov

et al.

Abstract: Efficient laser-plasma line X-ray source was developed. X-ray generation was optimized by the laser pulse duration alteration and using the local helium blowing into the microplasma region on a copper target located in atmospheric conditions. Measured Kα x-ray flux of 2·107 ph/pulse/2π sr and conversion efficiency of 10-5 were achieved correspondingly. Keywords: femtosecond laser pulses, X-rays.

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Vacuum-free femtosecond fiber laser microplasma X-ray source for radiography

Garmatina,

Mareev,

Minaev

et al. 2023

Opt. Express

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Radiographic imaging using X-rays is a tool for basic research and applications in industry, materials science, and medical diagnostics. In this article, we present a novel approach for the generation of X-rays using a vacuum-free microplasma by femtosecond fiber laser. By tightly focusing a laser pulse onto a micrometer-sized solid density near-surface plasma from a rotating copper target, we demonstrate the generation of Cu K-photons (8-9 keV) with high yield ∼ 1.6 × 109 phot/s/2π, and with a source size diameter of approximately 10 microns. Femtosecond fiber laser allows working with a high repetition rate (∼2 MHz) and moderate energy levels (10-40 µJ), ensuring the effective quasi-continuous generation of X-ray photons. Furthermore, we introduce a hybrid scheme that combines the tightly focusing laser-plasma X-ray generator with an online control unit for microplasma size source based on the back-reflected second harmonic generated in the laser-induced microplasma. The compactness and high performance of this vacuum-free femtosecond fiber laser microplasma X-ray source makes it a promising solution for advanced radiographic applications. Our preliminary results on the creation of a microfocus X-ray source provide insights into the feasibility and potential of this innovative approach.

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Vacuum-free femtosecond fiber laser microplasma X-ray source for radiography

Garmatina,

Mareev,

Minaev

et al. 2023

Opt. Express

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Increase in the Yield of X-rays and Terahertz Radiation from a Thin Foil Irradiated by Femtosecond Laser Pulses

Nazarov

Shcheglov

Garmatina

et al. 2023

Bull. Lebedev Phys. Inst.

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Generation and Application of X−ray Pulses on a Terawatt Laser System

et al. 2022

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Currently, the Kurchatov Laser−Synchrotron Complex is conducting research on the interaction of powerful femtosecond laser radiation with matter. The purpose of these studies is to develop new techniques and approaches for the characterization of high−temperature plasma, X−rays and particle acceleration, which can be the basis for the work planned within the framework of the synchrotron−neutron project. Laser−driven X−ray production, electron acceleration, nuclear fusion, ultrafast structural dynamics of nanoparticles in intense laser fields remains an active research topic, aimed at generating advanced controllable sources.

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Effective line X-ray generation by chirped femtosecond laser pulses interaction with copper target at local helium flow

Cited by 3 publications

References 17 publications

Vacuum-free femtosecond fiber laser microplasma X-ray source for radiography

Vacuum-free femtosecond fiber laser microplasma X-ray source for radiography

Increase in the Yield of X-rays and Terahertz Radiation from a Thin Foil Irradiated by Femtosecond Laser Pulses

Generation and Application of X−ray Pulses on a Terawatt Laser System

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