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A field electron emission spectrometer based on a hemispherical analysing element has been designed, built and tested. The instrument is versatile and convenient to operate, has a high sensitivity and a resolution of better than 30 mV. The performance of the instrument has been demonstrated in terms of the energy spectra of a tungsten emitter at 300 and 80K, for which comparative theoretical data exist.
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Braun et al. (1978) studied this question.
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