A compact electron gun for time-resolved electron diffraction

Matthew S. Robinson, Paul D. Lane, Derek A. Wann

Research output: Contribution to journalArticlepeer-review


A novel compact time-resolved electron diffractometer has been built with the primary goal of studying the ultrafast molecular dynamics of photoexcited gas-phase molecules. Here, we discuss the design of the electron gun, which is triggered by a Ti:Sapphire laser, before detailing a series of calibration experiments relating to the electron-beam properties. As a further test of the apparatus, initial diffraction patterns have been collected for thin, polycrystalline platinum samples, which have been shown to match theoretical patterns. The data collected demonstrate the focusing effects of the magnetic lens on the electron beam, and how this relates to the spatial resolution of the diffraction pattern.

Original languageEnglish
Article number013109
Number of pages6
JournalReview of Scientific Instruments
Issue number1
Publication statusPublished - Jan 2015

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