The diffraction correction for absolute gravimeters

The inherent curvature of the wavefronts in the laser beams used in most absolute gravimeters introduces a systematic reduction in the measured gravity value. This error depends strongly on the diameter of the laser beam, but is typically of the order of 1-5 mGal. This paper describes the origin of...

Full description

Saved in:
Bibliographic Details
Published in:Metrologia 2003-10, Vol.40 (5), p.258-263
Main Authors: Westrum, D van, Niebauer, T M
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The inherent curvature of the wavefronts in the laser beams used in most absolute gravimeters introduces a systematic reduction in the measured gravity value. This error depends strongly on the diameter of the laser beam, but is typically of the order of 1-5 mGal. This paper describes the origin of this reduction, and provides a correction based on the laser beam diameter as well as a practical method to measure the beam's diameter.
ISSN:0026-1394
1681-7575
DOI:10.1088/0026-1394/40/5/008