Dynamic TEM, DTEM

In an ordinary TEM, the time resolution of image recording is limited to 1/30 seconds (TV rate). However, the Dynamic TEM (DTEM) achieves a much higher time resolution of the order of nano seconds to femto seconds by the combined use of an electron source generating electron pulses and a fast recording system. A DTEM is equipped with a laser-pulse-driven photoelectron source and a pulse-laser specimen-irradiation system. By synchronizing the electron beam pulse with the pulse laser for the specimen, one can observe chemical reaction processes and crystallization processes with such a high time resolution.