A computational study on the optical shaping of gas targets via blast wave collisions for magnetic vortex acceleration

I. Tazes; S. Passalidis; E. Kaselouris; I. Fitilis; M. Bakarezos; N. A. Papadogiannis; M. Tatarakis; V. Dimitriou

doi:10.1017/hpl.2022.16

Journals >High Power Laser Science and Engineering >Volume 10 >Issue 5 >Page 05000e31 > Article

High Power Laser Science and Engineering
Vol. 10, Issue 5, 05000e31 (2022)

A computational study on the optical shaping of gas targets via blast wave collisions for magnetic vortex acceleration | On the Cover

I. Tazes^1、2, S. Passalidis³, E. Kaselouris^1、4, I. Fitilis^1、2, M. Bakarezos^1、4, N. A. Papadogiannis^1、4, M. Tatarakis^1、2, and V. Dimitriou^1、4、*

Author Affiliations

¹Institute of Plasma Physics and Lasers - IPPL, Hellenic Mediterranean University Research Centre, Rethymnon, Greece

²Department of Electronic Engineering, Hellenic Mediterranean University, Chania, Greece

³CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, Sorbonne Université, Paris, France

⁴Department of Music Technology and Acoustics, Hellenic Mediterranean University, Rethymnon, Greece

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DOI: 10.1017/hpl.2022.16 Cite this Article Set citation alerts

I. Tazes, S. Passalidis, E. Kaselouris, I. Fitilis, M. Bakarezos, N. A. Papadogiannis, M. Tatarakis, V. Dimitriou. A computational study on the optical shaping of gas targets via blast wave collisions for magnetic vortex acceleration[J]. High Power Laser Science and Engineering, 2022, 10(5): 05000e31 Copy Citation Text

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Abstract

This research work emphasizes the capability of delivering optically shaped targets through the interaction of nanosecond laser pulses with high-density gas-jet profiles, and explores proton acceleration in the near-critical density regime via magnetic vortex acceleration (MVA). Multiple blast waves (BWs) are generated by laser pulses that compress the gas-jet into near-critical steep gradient slabs of a few micrometres thickness. Geometrical alternatives for delivering the laser pulses into the gas target are explored to efficiently control the characteristics of the density profile. The shock front collisions of the generated BWs are computationally studied by 3D magnetohydrodynamic simulations. The efficiency of the proposed target shaping method for MVA is demonstrated for TW-class lasers by a particle-in-cell simulation.

Keywords

blast waves magnetic vortex acceleration MHD simulations particle acceleration PIC simulations

$$\begin{align}{v}_{\mathrm{sh}}=\frac{2}{2+a}{C}_{\gamma, {a}}^{2+{a}/2}{\left(\frac{E}{\rho}\right)}^{1/2}{\left({C}_{\gamma, {a}}{\left(\frac{E}{\rho}\right)}^{\frac{1}{2+{a}}}{t}^{\frac{2}{2+{a}}}\right)}^{-{a}/2},\end{align}$$

((1))

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$$\begin{align}K=\frac{\upsilon_{\mathrm{e}\mathrm{i}}}{c}\left(\frac{n_{\mathrm{e}}}{n_{\mathrm{cr}}}\right){\left(1-\frac{n_{\mathrm{e}}}{n_{\mathrm{cr}}}\right)}^{-1/2},\end{align}$$

((2))

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$$\begin{align}{\upsilon}_{\mathrm{e}\mathrm{i}}=\frac{1}{3{\left(2\pi \right)}^{\frac{3}{2}}}\frac{n_{\mathrm{e}}Z{e}^4\mathrm{ln}\;\Lambda\;}{\varepsilon_0^2{m}_{\mathrm{e}}^{\frac{1}{2}}{\left({K}_{\mathrm{B}}{T}_{\mathrm{e}}\left[\mathrm{K}\right]\right)}^{\frac{3}{2}}},\end{align}$$

((3))