Title :
First results of PTB´s atomic caesium fountain
Author :
Weyers, S. ; Bausch, A. ; Griebsch, D. ; Hübner, U. ; Schröder, R. ; Tamm, Ch.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
At PTB an atomic caesium fountain was constructed. Ramsey fringes with a FWHM of 0.86 Hz were obtained by launching the atoms to a height of 83 cm above the cooling region. A first measurement of the magnetic field homogeneity yields 0.33 nT (rms), only 0.16% of the mean value of 0.205 μT. First frequency comparisons with a hydrogen maser show promising results
Keywords :
atomic clocks; frequency standards; laser cooling; 0.33 nT; 83 cm; Cs; FWHM; PTB atomic caesium fountain; Ramsey fringes; atoms; cooling region; frequency comparisons; hydrogen maser; magnetic field homogeneity; Atom lasers; Atom optics; Atomic beams; Atomic measurements; Clocks; Cooling; Hydrogen; Magnetic field measurement; Standards development; Stationary state;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840696
