抄録
This paper describes an experimental inverstigation of the thermionic emission properties of tungsten hairpin filament coated with lanthanum hexaboride films (LaB6) by meams of ion beam sputter deposition method.
Measurement of brightness of the coated filament was parformed in a scanning electron microscope. As a result, the brightness of about 3.42×104 A/cm2·ster. (20 kV), was obtained by LaB6 coated tungsten hairpin filament.
Furthermore, it was found that resolution measured from the intervals between latexes obtained by S-450 (SEM) with LaB6 coated was about 20 nm.
