Low-density hydrodynamic optical-field-ionized plasma channels generated with an axicon lens


Shalloo, RJ, Arran, C, Picksley, A, von Boetticher, A, Corner, L ORCID: 0000-0002-3882-1272, Holloway, J, Hine, G, Jonnerby, J, Milchberg, HM, Thornton, C et al (show 2 more authors) (2019) Low-density hydrodynamic optical-field-ionized plasma channels generated with an axicon lens. PHYSICAL REVIEW ACCELERATORS AND BEAMS, 22 (4). 041302-.

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Abstract

We demonstrate optical guiding of high-intensity laser pulses in long, low density hydrodynamic optical-field-ionized (HOFI) plasma channels. An axicon lens is used to generate HOFI plasma channels with on-axis electron densities as low as $n_e(0) = 1.5\times 10^{17}\, \mathrm{cm}^{-3}$ and matched spot sizes in the range $ 20 \mu \mathrm{m} \lesssim W_M \lesssim 40 \mu \mathrm{m}$. Control of these channel parameters via adjustment of the initial cell pressure and the delay after the arrival of the channel-forming pulse is demonstrated. For laser pulses with a peak axial intensity of $4 \times 10^{17}\, \mathrm{W\,cm}^{-2}$, highly reproducible, high-quality guiding over more than 14 Rayleigh ranges is achieved at a pulse repetition rate of 5 Hz, limited by the available channel-forming laser and vacuum pumping system. Plasma channels of this type would seem to be well suited to multi-GeV laser wakefield accelerators operating in the quasi-linear regime.

Item Type: Article
Uncontrolled Keywords: physics.plasm-ph, physics.plasm-ph
Depositing User: Symplectic Admin
Date Deposited: 09 Oct 2020 08:43
Last Modified: 18 Jan 2023 23:30
DOI: 10.1103/PhysRevAccelBeams.22.041302
Open Access URL: https://doi.org/10.1103/PhysRevAccelBeams.22.04130...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3103497

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