Skip to Content

Sponsors

No results

Tags

No results

Types

No results

Search Results

Events

No results
Search events using: keywords, sponsors, locations or event type
When / Where
All occurrences of this event have passed.
This listing is displayed for historical purposes.

Presented By: CM-AMO Seminars

CM-AMO Seminar | Laser-cooled Microwave Atomic Clocks at NIST

Yaroslav Dudin (NIST Boulder)

Physics Physics
Physics
This talk will provide an overview of the primary frequency standards at NIST. Caesium fountains NIST-F1 and NIST-F2 are employed as national primary frequency standards operating with fractional uncertainties in low 10^-16 range. NIST-F2 is a second-generation standard developed with a cryogenic microwave cavity and flight region. The 80 K atom interrogation environment reduces the uncertainty due to the blackbody radiation shift by more than a factor of 50.

The second part of this talk will introduce our current efforts in developing laser-cooled atomic clocks for the next generation of GPS satellites. The current generation of atomic clocks used in GPS satellites is based on lamp-excited Rb vapor-cell clock techniques that date back 50 years and while the performance is impressive, it is unlikely to be further improved by incremental advances on the already very mature technology. Because the uncertainties of onboard clocks are significant contributors to the overall GPS error budget, there is interest in developing a new generation of robust, small, reliable, and accurate laser-cooled microwave atomic clocks for future generations of the GPS system.
Physics Physics
Physics

Co-Sponsored By

Explore Similar Events

  •  Loading Similar Events...

Back to Main Content