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High-speed multiframe dynamic transmission electron microscope image acquisition system with arbitrary timing

United States Patent

October 20, 2015
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An electron microscope is disclosed which has a laser-driven photocathode and an arbitrary waveform generator (AWG) laser system ("laser"). The laser produces a train of temporally-shaped laser pulses of a predefined pulse duration and waveform, and directs the laser pulses to the laser-driven photocathode to produce a train of electron pulses. An image sensor is used along with a deflector subsystem. The deflector subsystem is arranged downstream of the target but upstream of the image sensor, and has two pairs of plates arranged perpendicular to one another. A control system controls the laser and a plurality of switching components synchronized with the laser, to independently control excitation of each one of the deflector plates. This allows each electron pulse to be directed to a different portion of the image sensor, as well as to be provided with an independently set duration and independently set inter-pulse spacings.
Reed; Bryan W. (Livermore, CA), DeHope; William J. (Pleasanton, CA), Huete; Glenn (Tracy, CA), LaGrange; Thomas B. (Brentwood, CA), Shuttlesworth; Richard M. (Brentwood, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
14/ 181,321
February 14, 2014
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.