Prompt acceleration of the ${\mu }^{+}$ beam in a donut wakefield driven by a shaped Laguerre-Gaussian laser pulse

Abstract

The recent experimental data of anomalous magnetic moments strongly indicate the existence of new physics beyond the standard model. An energetic ${\mu }^{+}$ beam is a potential option to the expected neutrino factories, the future muon colliders and the $\mu$SR(the spin rotation, resonance and relaxation) technology. It is proposed a prompt acceleration scheme of the ${\mu }^{+}$ beam in a donut wakefield driven by a shaped Laguerre-Gaussian (LG) laser pulse. The forward part of the donut wakefield can accelerate and also focus positive particle beams effectively. The LG laser is shaped by a near-critical-density plasma. The shaped LG laser has the shorter rise time and can enlarge the acceleration field. The acceleration field driven by a shaped LG laser pulse is six times higher than that driven by a normal LG laser pulse. The simulation results show that the ${\mu }^{+}$ bunch can be accelerated from $200\mathrm{MeV}$ to 2GeV and the transversal size of the ${\mu }^{+}$ bunch is also focused from initial ${\omega }_0=5\mu m$ to $\omega =1\mu m$ within several picoseconds.

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References in corpus (2)

• Generating multi-GeV electron bunches using single stage laser wakefield acceleration in a 3D nonlinear regime
• Nonlinear laser driven donut wakefields for positron and electron acceleration