Table 2 Fractional frequency shifts and uncertainties from different systematic effects in the 133Cs fountain clock, known as NPL-CsF2, at NPL [87]
From: Measuring the stability of fundamental constants with a network of clocks
133Cs effect | Shift /10−16 | Uncertainty /10−16 |
|---|---|---|
Distributed cavity phase | 0.2 | 1.1 |
Blackbody radiation | −163.5 | 1.0 |
Second-order Zeeman | 2475.7 | 0.8 |
Microwave leakage | 0.0 | 0.6 |
Gravity | 13.0 | 0.5 |
Cold collisions | 2.0 | 0.4 |
Background gas | 0.0 | 0.3 |
Microwave lensing | 0.6 | 0.3 |
Other | 0.0 | 0.3 |
Total | Â | 2.0 |