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Start Over Author "SangGap Lee" Publisher american institute of physics
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1. Evading surface and detector frequency noise in harmonic oscillator measurements of force gradients.

Author

Moore, Eric W., SangGap Lee, Hickman, Steven A., Harrell, Lee E., and Marohn, John A.

Subjects
*AUDIO-frequency oscillators, *FREQUENCY discriminators, *RESONANT vibration, *SOUND measurement, *ELECTRON paramagnetic resonance
Abstract

We introduce and demonstrate a method of measuring small force gradients acting on a harmonic oscillator in which the force-gradient signal of interest is used to parametrically up-convert a forced oscillation below resonance into an amplitude signal at the oscillator’s resonance frequency. The approach, which we demonstrate in a mechanically detected electron spin resonance experiment, allows the force-gradient signal to evade detector frequency noise by converting a slowly modulated frequency signal into an amplitude signal. [ABSTRACT FROM AUTHOR]

Published
2010
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