Experience in the preparation and exact measurement of large cylindrical test masses for an experiment in determining the gravitational constant
Abstract
The paper describes the preparation and measurement of large cylindrical bodies designed for use in an experiment to determine the gravitational constant to five significant figures. The cylinders, fabricated from either carbon steel or copper, are 200 mm high, 180 mm in diameter, and have masses of 40 kg (steel) or 44 kg (copper). The measurements discussed include determinations of deviations from roundness in various cross sections, nonparallelism of the end planes, deviations of the cylinder generatrices from a straight line, and nonperpendicularity of the generatrices relative to the end planes. It is concluded that the cylinders are suitable for determining the gravitational constant with an accuracy of one part in one million.
- Publication:
-
Problemy Teorii Gravitatsii i Elementarnykh Chastits
- Pub Date:
- 1975
- Bibcode:
- 1975PrTGE...6..197K
- Keywords:
-
- Cylinders;
- Gravimetry;
- Gravitational Constant;
- Accuracy;
- Error Analysis;
- Mass Distribution;
- Pendulums;
- Tables (Data);
- Test Equipment;
- Torsional Vibration;
- Weight (Mass);
- Astrophysics