DocumentCode
1172419
Title
A revolution in timekeeping
Author
Essen, L.
Volume
13
Issue
5
fYear
1967
fDate
5/1/1967 12:00:00 AM
Firstpage
172
Lastpage
174
Abstract
An accuracy within 1 part in 1011 can now be obtained in the measurement of time and frequency. The basis of the unit of tims which has been in use since 1958 is the caesium standard, using the atomic-beam tube; another potential standard is the hydrogen maser, and the rubidium gas cell is a good working standard.
fLanguage
English
Journal_Title
Electronics and Power
Publisher
iet
ISSN
0013-5127
Type
jour
DOI
10.1049/ep.1967.0128
Filename
5178251
Link To Document