Microphone detection of pulsed atomic and molecular beams

Joong-Gill Choi, G. J. Diebold

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In a high-vacuum environment a microphone can act as a detector for atomic or molecular beams. Here, the response of the microphone to beams with gaussian temporal profiles is investigated. Using linear response theory, an analytic expression is found for the microphone output voltage for pulsed beams of arbitrary duration. Evaluation of this expression for pulses long compared with the period of oscillation of the lowest-frequency mode of vibration of the microphone diaphragm shows that the output follows the temporal profile of the pulse, with an amplitude proportional to the momentum flux in the pulse. For pulses that approximate delta functions in time, the microphone gives a somewhat distorted, damped sinusoidal response with a peak amplitude proportional to the impulse per area in the gas burst. An experiment was done that demonstrates the response of an electret microphone to a short burst of argon atoms.

Original languageEnglish
Pages (from-to)19-25
Number of pages7
JournalChemical Physics
Volume73
Issue number1-2
DOIs
Publication statusPublished - 1982 Dec 1

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Atomic beams
Molecular beams
atomic beams
Microphones
microphones
molecular beams
pulses
Gas bursts
bursts
Delta functions
Electrets
electrets
Argon
output
delta function
diaphragms
Diaphragms
high vacuum
profiles
impulses

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Choi, Joong-Gill ; Diebold, G. J. / Microphone detection of pulsed atomic and molecular beams. In: Chemical Physics. 1982 ; Vol. 73, No. 1-2. pp. 19-25.
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Microphone detection of pulsed atomic and molecular beams. / Choi, Joong-Gill; Diebold, G. J.

In: Chemical Physics, Vol. 73, No. 1-2, 01.12.1982, p. 19-25.

Research output: Contribution to journalArticle

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