1 August 1998 500-fs photoelectron gun for time-resolved electron diffraction experiments
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Abstract
A photoelectron gun as a source of a photoinduced, monoenergetic (energy spread <0.5 eV), well-collimated (divergence <0.5 deg), sharp (diameter <0.7 mm at the 1/e level), and ultrashort (²500 fs) bunch of electrons to be used for time-resolved electron diffraction (TRED) experiments is computer designed, assembled, and tested. in single-shot mode, it generates up to 103 of 30 keV electrons, and the electron pulse can be either measured in streak mode or focused onto a solid state target chosen from a set of interchangeable targets. High temporal resolution enables measurement with femtosecond precision of the diffraction pattern perturbation after the exiting laser radiation drops onto a target. Demonstration experiments with a 300- A1 target in transmission-type mode result in diffraction images of reasonable quality under accumulation of up to 4 x 104 500-fs photoelectron pulses.
Mikhail Ya. Schelev, Mikhail Ya. Schelev, Gennadii I. Bryukhnevich, Gennadii I. Bryukhnevich, Valerij I. Lozovoi, Valerij I. Lozovoi, Mikhail A. Monastyrski, Mikhail A. Monastyrski, Alexander M. Prokhorov, Alexander M. Prokhorov, Alexander V. Smirnov, Alexander V. Smirnov, Nikolai S. Vorobiev, Nikolai S. Vorobiev, } "500-fs photoelectron gun for time-resolved electron diffraction experiments," Optical Engineering 37(8), (1 August 1998). https://doi.org/10.1117/1.601743 . Submission:
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