Publication

A micromechanical detector for molecular beams

Philippe Renaud, Sandra Schweizer
1999
Journal Articles

Abstract

We demonstrate the detection of a molecular beam by means of a micromechanical momentum transfer detector operated in vibrational resonance. With a sensitive surface area of 0.5x0.3 mm(2) the small paddle allows us to detect a beam with 6.5x10(7) He atoms hitting the surface per second. The detector response time equals the damping time of the paddle oscillation of about 1 s. The detector is sensitive enough to measure intensities in molecular beam scattering experiments. The novel detection scheme has the potential to allow the development of a position sensitive molecular beam detector. (C) 1999 American Institute of Physics. [S0034-6748(99)01709-8].

Official source

https://infoscience.epfl.ch/entities/publication/9f5f7cbc-5780-4572-8161-f432c87c379b

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Philippe Renaud, Sandra Schweizer
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9f5f7cbc-5780-4572-8161-f432c87c379b

About this result

Related concepts (23)

Mechanical resonance

Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its resonance frequency or resonant frequency) closer than it does other frequencies. It may cause violent swaying motions and potentially catastrophic failure in improperly constructed structures including bridges, buildings and airplanes. This is a phenomenon known as resonance disaster.

Sympathetic resonance

Sympathetic resonance or sympathetic vibration is a harmonic phenomenon wherein a passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. The classic example is demonstrated with two similarly-tuned tuning forks. When one fork is struck and held near the other, vibrations are induced in the unstruck fork, even though there is no physical contact between them. In similar fashion, strings will respond to the vibrations of a tuning fork when sufficient harmonic relations exist between them.

Resonance

Resonance describes the phenomenon of increased amplitude that occurs when the frequency of an applied periodic force (or a Fourier component of it) is equal or close to a natural frequency of the system on which it acts. When an oscillating force is applied at a resonant frequency of a dynamic system, the system will oscillate at a higher amplitude than when the same force is applied at other, non-resonant frequencies. Frequencies at which the response amplitude is a relative maximum are also known as resonant frequencies or resonance frequencies of the system.

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A micromechanical detector for molecular beams

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