Absolute measurement of thermal noise in a resonant short-range force experiment
No Thumbnail Available
Can’t use the file because of accessibility barriers? Contact us with the title of the item, permanent link, and specifics of your accommodation need.
Date
2014-10-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing Ltd
Permanent Link
Abstract
Planar, double-torsional oscillators are especially suitable for short-range
macroscopic force search experiments, since they can be operated at the limit
of instrumental thermal noise. As a study of this limit, we report a measurement
of the noise kinetic energy of a polycrystalline tungsten oscillator in
thermal equilibrium at room temperature. The fluctuations of the oscillator in a
high-Q torsional mode with a resonance frequency near 1 kHz are detected
with capacitive transducers coupled to a sensitive differential amplifier. The
electronic processing is calibrated by means of a known electrostatic force and
input from a finite-element model. The measured average kinetic energy,
Eexp = (2.0 ± 0.3) × 10E-21 J, is in agreement with the expected value of 1/2kBT.
Description
Public domain version of publication, supporting data sets and analysis programs
Keywords
short-range tests of gravity, equipartition theorem, thermal noise measurements, torsional oscillators
Citation
H Yan et al 2014 Class. Quantum Grav. 31 205007
Link(s) to data and video for this item
Relation
Rights
Yan_et_al_Class_Quantum_Grav_31_205007_2014 is made available under the Open Data Commons Attribution License: http://opendatacommons.org/licenses/by/
Type
Article
Dataset
Other
Dataset
Other