Liquid actuated gravity experiments

TL;DR

This paper introduces a liquid-based actuation method for gravity experiments that modulates gravitational force without moving parts, enabling precise testing of gravity laws at short distances.

Contribution

It presents a novel liquid field mass technique for gravity modulation, offering a new approach for conducting gravity experiments without mechanical motion.

Findings

Demonstrates a liquid actuator capable of modulating gravity force.

Analyzes application to test inverse square law at mm to cm scales.

Provides detailed discussion of liquid actuator design and use.

Abstract

We describe a new actuation technique for gravity experiments based on a liquid field mass. The Characterizing idea is to modulate the gravity force acting on a test mass by controlling the level of a liquid in a suitable container. This allows to obtain a periodical gravity force without moving parts (except the liquid level) close to the TM. We describe in detail the most relevant aspects of the liquid actuator and discuss how it can be used in gravity experiments. In particular we analyse an application to test the inverse square law in the mm to cm distance region.