The HF-2000, a cold field emission transmission electron microscope S. Isakozawa, Y. Kashikura, Y. Sato, T. Takahashi, M. Ichihashi and H. MurakoshiMicrosc. Microanal. Microstruct., 1 2 (1990) 159-163DOI: https://doi.org/10.1051/mmm:0199000102015900