Velocity distributions calculated from the Fourier transforms of Ramsey lineshapes

Author

Shirley, Jon H.

Author_Institution

Time & Frequency Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

46

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

117

Lastpage

121

Abstract

A computerized method for finding velocity distributions from the Fourier transforms of Ramsey lineshapes has been developed. Experimental and numerical tests of the method show that it works very well for broad distributions and lineshapes where the drift time is much longer than the excitation time. The method is routinely used to find velocity distributions for the primary frequency standard NIST-7. The second-order Doppler shift is calculated from these distributions with an uncertainty of a few tenths of 1 percent

Keywords

Doppler shift; Fourier transforms; frequency measurement; measurement standards; physics computing; resonant states; spectral analysis; spectral line breadth; Fourier transforms; NIST-7; Ramsey lineshapes; computerized method; drift time; excitation time; frequency standard; numerical tests; primary frequency standard; quality of fit parameter; second-order Doppler shift; transit time; velocity distribution; Distributed computing; Doppler shift; Fourier transforms; Frequency; Interference; Microwave theory and techniques; Optical pulses; Resonance; Testing; Uncertainty;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.571788

Filename

571788