The authors describe the emission characteristics of a Cs + ion field-emitter, consisting of a sharply pointed Ni needle (apex radius of curvature approximately 0.1 mu m) wetted with liquid Cs and continuously fed via a capillary reservoir in which the lower part of the needle resides. The experimental results are compared with the predictions of the field-evaporation theory.
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Aitken et al. (1980) studied this question.
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