Development of a 1 MV field-emission transmission electron microscope

We developed a 1 MV field-emission transmission electron microscope. This paper reports details and specifications of the instrument. The microscope was designed to obtain a bright and coherent electron beam by using the field emission gun equipped with a pre-accelerating magnetic lens and the highvoltage power supply with high stability (0.5 ppm min−1). Using this microscope, the brightness of 1.8�1010 A cm−2 sr−1 and the lattice resolution of 49.8 pm were attained.