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Title: A compact electron gun for time-resolved electron diffraction

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.
Authors:
; ;  [1]
  1. Department of Chemistry, University of York, Heslington, York YO10 5DD (United Kingdom)
Publication Date:
OSTI Identifier:
22392307
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CALIBRATION; DESIGN; ELECTRON BEAMS; ELECTRON DIFFRACTION; ELECTRON GUNS; FOCUSING; LENSES; MOLECULAR DYNAMICS METHOD; PLATINUM; POLYCRYSTALS; SOLID STATE LASERS; SPATIAL RESOLUTION; TIME RESOLUTION