Narrow-band pulsed electron source based on near-threshold photoionization of Cs in a magneto-optical trap

@article{Fedchenko2019NarrowbandPE,
  title={Narrow-band pulsed electron source based on near-threshold photoionization of Cs in a magneto-optical trap},
  author={Olena Fedchenko and S. V. Chernov and Gerd Schǒnhense and Rapha{\"e}l Hahn and Daniel Comparat},
  journal={Physical Review A},
  year={2019}
}
The newly developed method of time-of-flight (ToF) momentum microscopy was used to analyse the cold electron emission from a Cs 3D magneto-optical trap (MOT). Three-step resonant photoionization was implemented via two intermediate states (6P3/2 pumped with 852 nm laser and 7S1/2 with 1470 nm) and a tuneable femtosecond Ti:sapphire laser for the final ionization step. The magnetic field of the MOT is switched off during the photoionization step. The natural bandwidth of the fs-laser is reduced… 

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