Improving Casimir Force Measurements by Removing Vibration Noise

Boston University researchers were trying to isolate mechanical noise from a custom metrology platform. This platform incorporated a MEMs accelerometer, which was repurposed to carry out sensitive, room temperature measurements of the Casimir force.

The aim of carrying out Casimir Force measurements was to use this capability to produce cost effective and sensitive quantum metrology within an ambient environment.

What is the Casimir Effect?

Within an electromagnetic vacuum, the Casimir Effect is an exact representation of quantum changes. As a result of quantum fluctuations in the vacuum, the Casimir Effect manifests as a minute, pN-scale force arising between metallic surfaces at < 1µm separation.

As the forces needing to be measured were so minute, it was necessary for the noise floor of the accelerometer to be as low as possible.

Improving Casimir Force Measurements by Removing Vibration Noise

Image Credit: Herzan LLC

Discovering the Correct Solution

Due to their low-frequency resonance and limited isolation ability, passive vibration control systems were not enough. The team looked to an active vibration control table, which was uniquely suited to produce the lowest noise floor possible.

In order to remove disruptive vibration noise from their measurements, Herzan partnered with the researching team, enabling greater measurement resolution. Furthermore, the researchers incorporated a styrofoam enclosure for thermal isolation.

Nature Microsystems & Nanoengineering featured this research and the resulting paper.

Application

Casimir Force Research

End User

Boston University

Isolation System

TS-140 Active Vibration Isolation Table

TS-140 Active Vibration Isolation Table

Image Credit: Herzan LLC

Instrument

Custom Casimir metrology platform with a MEMs sensor

This information has been sourced, reviewed and adapted from materials provided by Herzan LLC.

For more information on this source, please visit Herzan LLC.

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