Recent improvements and current uncertainty budget of PTB fountain clock CSF2

V. Gerginov, N. Nemitz, D. Griebsch, M. Kazda, R. Li, Kurt Gibble, R. Wynands, S. Weyers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

A new source of slow atoms was recently installed on the caesium fountain CSF2 at PTB. This source allows the short-term instability σ y(1s) of CSF2 to be reduced from 2.5×10-13 to 1.7×10-13. Because of the reduced atom loading time and the higher number of atoms, the collisional shift uncertainty is no longer the largest term in the uncertainty budget. The uncertainty is now dominated by the uncertainty contribution due to the observed microwave power dependence of the output frequency. Measurements with the CSF1 fountain suggest that the longitudinal cavity phase gradients produce the observed frequency shifts at elevated power. For normal operation related shifts in CSF1 are expected to be much less than 1×10-16. Due to the larger cloud size associated with the optical molasses used for cooling in CSF2, the effects of longitudinal phase gradients will be even further suppressed in CSF2.

Original languageEnglish (US)
Title of host publicationEFTF 2010 - 24th European Frequency and Time Forum
DOIs
StatePublished - Dec 1 2010
Event24th European Frequency and Time Forum, EFTF 2010 - Noordwijk, Netherlands
Duration: Apr 13 2010Apr 16 2010

Publication series

NameEFTF 2010 - 24th European Frequency and Time Forum

Other

Other24th European Frequency and Time Forum, EFTF 2010
CountryNetherlands
CityNoordwijk
Period4/13/104/16/10

Fingerprint

budgets
clocks
atoms
gradients
shift
cesium
frequency shift
cooling
microwaves
cavities
output

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Gerginov, V., Nemitz, N., Griebsch, D., Kazda, M., Li, R., Gibble, K., ... Weyers, S. (2010). Recent improvements and current uncertainty budget of PTB fountain clock CSF2. In EFTF 2010 - 24th European Frequency and Time Forum [6533639] (EFTF 2010 - 24th European Frequency and Time Forum). https://doi.org/10.1109/EFTF.2010.6533639
Gerginov, V. ; Nemitz, N. ; Griebsch, D. ; Kazda, M. ; Li, R. ; Gibble, Kurt ; Wynands, R. ; Weyers, S. / Recent improvements and current uncertainty budget of PTB fountain clock CSF2. EFTF 2010 - 24th European Frequency and Time Forum. 2010. (EFTF 2010 - 24th European Frequency and Time Forum).
@inproceedings{3c4a70bdff964b37a35df9fcc73762e5,
title = "Recent improvements and current uncertainty budget of PTB fountain clock CSF2",
abstract = "A new source of slow atoms was recently installed on the caesium fountain CSF2 at PTB. This source allows the short-term instability σ y(1s) of CSF2 to be reduced from 2.5×10-13 to 1.7×10-13. Because of the reduced atom loading time and the higher number of atoms, the collisional shift uncertainty is no longer the largest term in the uncertainty budget. The uncertainty is now dominated by the uncertainty contribution due to the observed microwave power dependence of the output frequency. Measurements with the CSF1 fountain suggest that the longitudinal cavity phase gradients produce the observed frequency shifts at elevated power. For normal operation related shifts in CSF1 are expected to be much less than 1×10-16. Due to the larger cloud size associated with the optical molasses used for cooling in CSF2, the effects of longitudinal phase gradients will be even further suppressed in CSF2.",
author = "V. Gerginov and N. Nemitz and D. Griebsch and M. Kazda and R. Li and Kurt Gibble and R. Wynands and S. Weyers",
year = "2010",
month = "12",
day = "1",
doi = "10.1109/EFTF.2010.6533639",
language = "English (US)",
isbn = "9781467359702",
series = "EFTF 2010 - 24th European Frequency and Time Forum",
booktitle = "EFTF 2010 - 24th European Frequency and Time Forum",

}

Gerginov, V, Nemitz, N, Griebsch, D, Kazda, M, Li, R, Gibble, K, Wynands, R & Weyers, S 2010, Recent improvements and current uncertainty budget of PTB fountain clock CSF2. in EFTF 2010 - 24th European Frequency and Time Forum., 6533639, EFTF 2010 - 24th European Frequency and Time Forum, 24th European Frequency and Time Forum, EFTF 2010, Noordwijk, Netherlands, 4/13/10. https://doi.org/10.1109/EFTF.2010.6533639

Recent improvements and current uncertainty budget of PTB fountain clock CSF2. / Gerginov, V.; Nemitz, N.; Griebsch, D.; Kazda, M.; Li, R.; Gibble, Kurt; Wynands, R.; Weyers, S.

EFTF 2010 - 24th European Frequency and Time Forum. 2010. 6533639 (EFTF 2010 - 24th European Frequency and Time Forum).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Recent improvements and current uncertainty budget of PTB fountain clock CSF2

AU - Gerginov, V.

AU - Nemitz, N.

AU - Griebsch, D.

AU - Kazda, M.

AU - Li, R.

AU - Gibble, Kurt

AU - Wynands, R.

AU - Weyers, S.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - A new source of slow atoms was recently installed on the caesium fountain CSF2 at PTB. This source allows the short-term instability σ y(1s) of CSF2 to be reduced from 2.5×10-13 to 1.7×10-13. Because of the reduced atom loading time and the higher number of atoms, the collisional shift uncertainty is no longer the largest term in the uncertainty budget. The uncertainty is now dominated by the uncertainty contribution due to the observed microwave power dependence of the output frequency. Measurements with the CSF1 fountain suggest that the longitudinal cavity phase gradients produce the observed frequency shifts at elevated power. For normal operation related shifts in CSF1 are expected to be much less than 1×10-16. Due to the larger cloud size associated with the optical molasses used for cooling in CSF2, the effects of longitudinal phase gradients will be even further suppressed in CSF2.

AB - A new source of slow atoms was recently installed on the caesium fountain CSF2 at PTB. This source allows the short-term instability σ y(1s) of CSF2 to be reduced from 2.5×10-13 to 1.7×10-13. Because of the reduced atom loading time and the higher number of atoms, the collisional shift uncertainty is no longer the largest term in the uncertainty budget. The uncertainty is now dominated by the uncertainty contribution due to the observed microwave power dependence of the output frequency. Measurements with the CSF1 fountain suggest that the longitudinal cavity phase gradients produce the observed frequency shifts at elevated power. For normal operation related shifts in CSF1 are expected to be much less than 1×10-16. Due to the larger cloud size associated with the optical molasses used for cooling in CSF2, the effects of longitudinal phase gradients will be even further suppressed in CSF2.

UR - http://www.scopus.com/inward/record.url?scp=84881149292&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84881149292&partnerID=8YFLogxK

U2 - 10.1109/EFTF.2010.6533639

DO - 10.1109/EFTF.2010.6533639

M3 - Conference contribution

SN - 9781467359702

T3 - EFTF 2010 - 24th European Frequency and Time Forum

BT - EFTF 2010 - 24th European Frequency and Time Forum

ER -

Gerginov V, Nemitz N, Griebsch D, Kazda M, Li R, Gibble K et al. Recent improvements and current uncertainty budget of PTB fountain clock CSF2. In EFTF 2010 - 24th European Frequency and Time Forum. 2010. 6533639. (EFTF 2010 - 24th European Frequency and Time Forum). https://doi.org/10.1109/EFTF.2010.6533639