Operating plasma density issues on large-scale laser-plasma accelerators toward high-energy frontier

Consideration of laser-driven plasma-based electron/positron accelerators with a 2 TeV center-of-mass energy is presented, employing a multistaging scheme consisting of successive multi-GeV laser wakefield accelerators operated at the plasma density range of {10}^{15}--{10}^{18}\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}3}in the quasilinear regime. A total accelerator length is determined by an operating plasma density and a coupling...