Ultrafast laser micromachining of submillimetric de Laval nozzles in alumina for laser electron acceleration

Zuffi, Armando V. F.; Tabacow, Fabio Bittencourt Dutra; Vieira, Nilson D.; Samad, Ricardo Elgul

doi:10.1109/sbfotoniopc54450.2022.9992490

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…During this PhD, I worked on the development of techniques to manufacture micrometric de Laval nozzles by ultrafast laser micromachining [116,120] . We established a methodology to manufacture high-quality de Laval nozzles by ultrashort laser pulses trepanning on alumina substrates (Al2O3), a dielectric ceramic.…”

Section: Introduction |mentioning

confidence: 99%

Creation and spatial-temporal characterization of gas targets and plasmas for laser-electron acceleration

Zuffi¹

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His enthusiasm and friendly attitude keep things going easily even in the most difficult situations.I owe special thanks to Prof. Dr. Nilson Vieira Dias Júnior for all the insightful discussions that we have had. He assumed a leadership role in efforts to implement the first laser-plasma accelerator infrastructure in Brazil, always motivating everyone involved in this aim.I also owe special thanks to Prof. Dr. Edison Puig Maldonado for his valuable advice, mainly when I started my PhD. He always suggested good references in the literature, which contributed to guiding this work.I also thank Prof. Dr. Sudeep Banerjee for his collaboration with our research group, being one of the main motivators to join us in the laser wakefield acceleration field. His two visits to our lab gave me great learning and encouraged me to apply for a scholar internship in his former lab, Extreme Light Laboratory in the US.

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Section: Introduction |mentioning

confidence: 99%

Creation and spatial-temporal characterization of gas targets and plasmas for laser-electron acceleration

Zuffi¹

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Laser-machined two-stage nozzle optimised for laser wakefield acceleration

Tomkus,

Mackevičiūtė,

Dudutis

et al. 2024

J. Plasma Phys.

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In this paper, the modelling and manufacturing of a two-stage supersonic gas jet nozzle enabling the formation of adaptive plasma concentration profiles for injection and acceleration of electrons using few-cycle laser beams are presented. The stages are modelled using the rhoSimpleFoam algorithm of the OpenFOAM computational fluid dynamics software. The first 200–300 ${\rm \mu}$ m diameter nozzle stage is dedicated to 1 % N2 + He gas jet formation and electron injection. By varying the pressure between the first and second stages of the injectors, the electron injection location could be adjusted, and the maximum acceleration distance could be ensured. By changing the concentration of the nitrogen in the gas mixture, the charge of the accelerated electrons could be controlled. The second nozzle stage is designed for acceleration in fully ionised He or hydrogen gas and forms the optimal plasma concentration for bubble formation depending on the laser pulse energy, duration and focused beam diameter. In order to reduce the diameter of the plasma profile formed by the first nozzle and the concentration drop gap between the two nozzles, a one-side straight section was introduced in the first nozzle. The shock wave reflected from the straight section of the wall propagates parallel to the shock wave of the intersecting supersonic jets and ensures a minimal gap between the jets. The second-stage longitudinal plasma concentration profile could have an increasing gas density gradient to compensate for dephasing between the electron bunch and the plasma wave due to wave shortening with increasing plasma concentration.

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Ionization Model to Estimate the Density and Temperature Offs-Laser-Induced Plasmas in Air

Zuffi,

dos Santos,

Samad

2023

2023 International Conference on Optical MEMS and Nanophotonics (OMN) and SBFoton International Optics and Photonics Conference

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Ultrafast laser micromachining of submillimetric de Laval nozzles in alumina for laser electron acceleration

Cited by 3 publications

References 35 publications

Creation and spatial-temporal characterization of gas targets and plasmas for laser-electron acceleration

Creation and spatial-temporal characterization of gas targets and plasmas for laser-electron acceleration

Laser-machined two-stage nozzle optimised for laser wakefield acceleration

Ionization Model to Estimate the Density and Temperature Offs-Laser-Induced Plasmas in Air

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