ECAMP 15

We present the magnetic system constructed for the state-of-the-art $5\times 10^{-18}$ fractional frequency uncertainty Sr transportable clock developed within the “Advanced Quantum Clock For Real-World Applications” project. The system includes a compact permanent-magnets Zeeman slower, a pair of Helmholtz coils for atom trapping, and a compact set of compensation coils used to cancel out external magnetic fields. The longitudinal Zeeman slower is designed to minimize the magnetic field at the output of the atomic beam, disturbing the field at the centre of the science chamber at the level of $10^{-7}$ T. The coils are controlled by programmable drivers modules mounted in Sinara 3HU 19” EuroRack-size crate. The drivers provide up to 100 A and $3\times 3$ A of current for MOT coils and compensation coils, respectively, allows for fast switching between desired levels, a linear ramp of arbitrary time, and switching between Helmholtz and anti-Helmholtz configuration.
The AQuRA project has received funding from the European Union’s Horizon Europe research and innovation programme ​​under grant agreement No 101080166 (AQuRA project).