This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.

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LaB₆ filaments offer a high current, but the brightness is by three orders of magnitude lower than that of FEGs. Whereas the high current is well suited for energy-filtering TEM (EFTEM), the low brightness leads to impractically small currents if a small electron probe of nanometer size is formed. Furthermore, a table on the comparison of various electron sources is presented in page1409.