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2013 R&D 100 Winner
MM-DTEMTransmission electron microscopy (TEM) is a powerful tool for revealing the structure and properties of materials on atomic, nanometer and micrometer scales. Unfortunately, conventional TEM typically offers 30-Hz frame rates and is limited to measurements that are slow. In 2008, Lawrence Livermore National Laboratory won an R&D 100 Award for a technology that could reduce the exposure time for TEM to roughly 15 nsec, allowing researchers to catch a snapshot of materials processes that evolve in as little as a few nanoseconds. Now developers at Livermore Lab and Integrated Dynamic Electron Services have introduced the Movie Mode Dynamic Transmission Electron Microscope (MM-DTEM), which can capture an in situ multi-frame movie that reveals a complex sequence of nanoscale events with frame rates over 100,000 times faster than those of conventional techniques. MM-DTEM is based on a TEM that has been modified to include two pulsed lasers, the sample drive laser and the cathode laser. The first laser heats the specimen, initiating the process of interest. The cathode laser triggers and releases billions of electrons, which proceed into and through the target, generating a readable diffraction. To achieve movie mode, a series of pulses is generated.

Technology
Transmission electron microscope

Developers
Lawrence Livermore National Laboratory


Development Team

Lawrence Livermore National Laboratory's Movie Mode Dynamic Transmission Electron Microscopy (MM-DTEM) development team.

 












The Movie Mode Dynamic Transmission Electron Microscope (MM-DTEM) Development Team from Lawrence Livermore National Laboratory
Thomas LaGrange, Principal Developer
William J. DeHope
Glenn Huete
Daniel J. Masiel
Bryan W. Reed
Richard M. Shuttlesworth

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