English

Measurement of the decay of laser-driven linear plasma wakefields

Plasma Physics 2023-12-12 v1

Abstract

We present the first measurements of the temporal decay rate of one-dimensional, linear Langmuir waves excited by an ultra-short laser pulse. Langmuir waves with relative amplitudes of approximately 6%6\% were driven by 1.71.7 J, 5050 fs laser pulses in hydrogen and deuterium plasmas of density ne0=8.4×1017n_{e0} = 8.4 \times 10^{17} cm3^{-3}. The wakefield lifetimes were measured to be τwfH2=(9±2)\tau^\mathrm{H_2}_\mathrm{wf} = (9\pm2) ps and τwfD2=(16±8)\tau^\mathrm{D_2}_\mathrm{wf} = (16\pm8) ps respectively for hydrogen and deuterium. The experimental results were found to be in good agreement with 2D particle-in-cell simulations. In addition to being of fundamental interest, these results are particularly relevant to the development of laser wakefield accelerators (LWFAs) and wakefield acceleration schemes using multiple pulses, such as multi-pulse laser wakefield accelerators (MP-LWFAs).

Keywords

Cite

@article{arxiv.2306.06438,
  title  = {Measurement of the decay of laser-driven linear plasma wakefields},
  author = {J. Jonnerby and A. von Boetticher and J. Holloway and L. Corner and A. Picksley and A. J. Ross and R. J. Shalloo and C. Thornton and N. Bourgeois and R. Walczak and S. M. Hooker},
  journal= {arXiv preprint arXiv:2306.06438},
  year   = {2023}
}