Generation of ultrashort ion pulses from ultrafast electron-stimulated desorption

Abstract

We present an efficient method to produce laser-triggered proton pulses well below 500 ps pulse width at keV energies. We use femtosecond photoelectron pulses emitted from a cathode to enable ultrafast electron-stimulated desorption of adsorbates on a stainless steel plate under ultrahigh vacuum conditions. While direct photoionization of atoms to form well-timed ion pulses can suffer from a laser-focus-limited large starting volume, in our method the two-dimensional starting plane of the ions is defined with nanometer precision at a solid surface. We clearly outline how the method could be used in the future to efficiently produce ion beam pulses in the (sub)picosecond range for pump-probe experiments with ions.

References in corpus (9)

• Towards Exact Molecular Dynamics Simulations with Machine-Learned Force Fields
• Strong scaling of general-purpose molecular dynamics simulations on GPUs
• Tuning quantum non-local effects in graphene plasmonics
• Compression of sub-relativistic space-charge-dominated electron bunches for single-shot femtosecond electron diffraction
• Coherent interaction between free electrons and a photonic cavity
• Polarized phonons carry the missing angular momentum in femtosecond demagnetization
• Nonadiabatic Ehrenfest molecular dynamics within the projector augmented-wave method
• Ultrafast scanning electron microscope applied for studying the interaction between free electrons and optical near-fields of periodic nanostructures
• Optical manipulation of matter waves