Record of the lowest frequency shot noise measurement below 10 Hz

B. Cho, T. Itagaki, C. Oshima

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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
Volume91
Issue number5
DOIs
Publication statusPublished - 2007

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shot noise
noise measurement
field emission
low frequencies
flicker
residual gas
frequency measurement
space charge
damping
retarding
adsorption
sensitivity
curves

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Record of the lowest frequency shot noise measurement below 10 Hz. / Cho, B.; Itagaki, T.; Oshima, C.

In: Applied Physics Letters, Vol. 91, No. 5, 051916, 2007.

Research output: Contribution to journalArticle

Cho, B. ; Itagaki, T. ; Oshima, C. / Record of the lowest frequency shot noise measurement below 10 Hz. In: Applied Physics Letters. 2007 ; Vol. 91, No. 5.
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