Record of the lowest frequency shot noise measurement below 10 Hz

B. Cho, T. Itagaki, C. Oshima

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The noise of field emission (FE) currents ranging from 10 pA to 100 μA was measured under ∼7× 10-10 Pa. Stepwise features were routinely observed in damping curves of the FE current, indicating remarkable sensitivity of the FE current measuring system. The lowest frequency measurement of shot noise was recorded below 10 Hz. Space-charge suppression of noise was not observed for FE currents up to 100 μA. Adsorption of residual gas increased the intensity of noise and made the noise of field emission current be dominated by the flicker noise.

Original languageEnglish
Article number051916
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 2007


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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