MeV photoelectron spectrometer for ultraintense laser interactions with atoms and molecules

Abstract

Traditional laser-matter spectroscopy techniques fail to accurately analyze photoelectrons and ions from ultrahigh intensity studies with terawatt and petawatt laser systems. We present a magnetic deflection, photoelectron spectrometer for ultrahigh intensity laser interactions with atoms and molecules in the single atom/molecule limit. Spectrometer fabrication and calibration, and noise background are presented as well as example photoelectron spectra for argon and chloromethane over an energy range from 20 keV to 2 MeV.

Modified saddle-point method applied to direct ionization of noble gas atoms

“…In this case, our MSPM is even more useful since direct NI is more difficult. At ELI-Beamlines ultrahigh laser intensities (>10 22 W cm −2 ) are in reach [35,36], so our MSPM is useful for processes with highly charged ions at these extreme laser intensities.…”