Title :
Velocity distributions and second-order Doppler shifts in an optically pumped cesium beam frequency standard
Author :
Lee, H.S. ; Kwon, T.Y. ; Yang, S.H. ; Baek, K.J. ; Oh, C.H. ; Kim, P.S.
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
Abstract :
The velocity distribution of cesium atoms in an optically pumped cesium beam frequency standard constructed at the KRISS is obtained by using the Fourier transform of Ramsey lineshape. The velocity distribution fits well with a 1//spl upsi//sup 2/-weighted Maxwellian rather than a 1//spl upsi/-weighted one in our case. The second-order Doppler shift is -2.7/spl times/10/sup -13/.
Keywords :
Doppler shift; atomic beams; atomic clocks; caesium; frequency standards; optical pumping; Cs; Fourier transform; KRISS-1 standard; Rabi frequency; Ramsey lineshape; optically pumped cesium beam frequency standard; second-order Doppler shifts; transit-time distribution; velocity distributions; weighted average; Atom optics; Atomic beams; Doppler shift; Fourier transforms; Frequency; Laser excitation; Laser theory; Optical beams; Optical pumping; Pump lasers;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699733
