Journal
ULTRAMICROSCOPY
Volume 127, Issue -, Pages 14-18Publisher
ELSEVIER
DOI: 10.1016/j.ultramic.2012.07.015
Keywords
Ultrashort relativistic electron beams; Pump-probe timing methods
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In this paper we report on a simple and robust method to measure the absolute temporal overlap of the laser and the electron beam at the sample based on the effect of a laser induced plasma on the electron beam transverse distribution, successfully extending a similar method from keV to MeV electron beams. By pumping a standard copper TEM grid to form the plasma, we gain timing information independent of the sample under study. In experiments discussed here the optical delay to achieve temporal overlap between the pump electron beam and probe laser can be determined with similar to 1 ps precision. (c) 2012 Elsevier B.V. All rights reserved.
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