Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

APS

SURFing the Physics Laboratory at NIST: The Cold Atom Fountain Clock

Jennifer Sebby-Strabley

Published Apr 1, 1998• 0 citations
OpenAlex

Related papers

A COLD-ATOM CLOCK BASED ON COHERENT POPULATION TRAPPING | NIST

Elizabeth A. Donley, François-Xavier Esnault, E. Blanshan +1 more

•Nov 26, 2012•0 citations

Fountains of time: Tossing cold atoms like confetti, atomic‐fountain clocks launch a new era in timekeeping

Peter Weiß

Science News•Aug 7, 1999•0 citations

Evaluation of Magnetic Field Homogeneity using Cold Atoms as Sensors in Cesium Fountain Atomic Clock

Anjali Bisht, Manoj Das, Suchi Yadav +1 more

URSI Regional Conference on Radio Science (URSI-RCRS)•Jan 1, 2024•0 citations

Characterization of a cold cesium source for PARCS: Primary Atomic Reference Clock in Space

Thomas P. Heavner, Leo W. Hollberg, S.R. Jefferts +4 more

The PARCS (Primary Atomic Reference Clock in Space) project is a joint NIST JPL venture aimed at placing a Cs atomic clock aboard the International Space Station. This orbiting clock will achieve high accuracies in part due to the long Ramsey times afforded by the microgravity environment. The clock will allow a wide range of precision tests of fundamental physics including relativity theory. Our group at NIST is performing experimental studies of a "prototype" cold Cs source based on launching atoms from optical molasses. The results of our work will be applied to the design and construction of a robust, space qualified device. Additionally, this work is important for the development of future Cs fountains. We describe our apparatus, the present state of our experimental work, and planned improvements.

Conference on Precision Electromagnetic Measurements•Nov 7, 2002•1 citation

Laser-Cooled Atomic Clocks at NIST

Steven R. Jefferts

APS•Mar 1, 2001•0 citations

Progress towards a laser-cooled cesium atomic fountain frequency standard at NIST, Gaithersburg

William M. Klipstein, Christopher R. Ekstrom, S. L. Rolston +1 more

We report here on progress towards the realization of an atomic frequency standard using a fountain of laser cooled cesium atoms. We have recently observed Ramsey fringes on the 9.2 GHz clock transition and have begun preliminary work aimed at characterizing our fountain. This paper describes briefly the apparatus, discusses our current work and near-term directions. We conclude with a brief discussion of a laser system being built to realize two-dimensional Raman cooling or Raman velocity selection for cooling below the single photon recoil limit. This system will be used either in our fountain or in a cold-atom clock to be flown on the International Space Station.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•Nov 27, 2002•2 citations
The PARCS (Primary Atomic Reference Clock in Space) project is a joint NIST JPL venture aimed at placing a Cs atomic clock aboard the International Space Station. This orbiting clock will achieve high accuracies in part due to the long Ramsey times afforded by the microgravity environment. The clock will allow a wide range of precision tests of fundamental physics including relativity theory. Our group at NIST is performing experimental studies of a "prototype" cold Cs source based on launching atoms from optical molasses. The results of our work will be applied to the design and construction of a robust, space qualified device. Additionally, this work is important for the development of future Cs fountains. We describe our apparatus, the present state of our experimental work, and planned improvements.
We report here on progress towards the realization of an atomic frequency standard using a fountain of laser cooled cesium atoms. We have recently observed Ramsey fringes on the 9.2 GHz clock transition and have begun preliminary work aimed at characterizing our fountain. This paper describes briefly the apparatus, discusses our current work and near-term directions. We conclude with a brief discussion of a laser system being built to realize two-dimensional Raman cooling or Raman velocity selection for cooling below the single photon recoil limit. This system will be used either in our fountain or in a cold-atom clock to be flown on the International Space Station.