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Displaying 26 - 50 of 58

Improvements in NIST-F1 and a Resulting Accuracy of df/f = 0.61 * 10 -15

August 23, 2004
Author(s)
Thomas P. Heavner, Steven R. Jefferts, Elizabeth A. Donley, Jon H. Shirley, Thomas E. Parker
Over the last several years we have made many improvements to NIST-F1 (a laser-cooled cesium fountain primary frequency standard) resulting in a reduction in the uncertainty by nearly a factor of 2 in the realization of the SI second at NIST. We recently

A U.S. Laser-Cooled Atomic-Clock System for Space

January 1, 2001
Author(s)
Donald Sullivan, Thomas P. Heavner, Leo W. Hollberg, D Meekhof, Thomas E. Parker, William D. Phillips, S L. Rolston, Hugh Robinson, Jon H. Shirley, F L. Walls, Neil Ashby, W Kepstein, L Maleki, D Seidel, R Q. Thompson, S Wu, L Young, R Vessot, E Mattison, A Demarchi