Progress toward a CPT-Ramsey clock based on a continuous cold cesium beam

We reported on a progress toward a CPT-Ramsey clock based on a continuous cold cesium beam. The cesium beam has a high flux of 3 × 10
¹⁰
atoms/s and a most probable velocity of 7 m/s. Two Raman laser beams are aligned to be orthogonal to the cold atomic beam. The two CPT zones are spatially separated. A CPT resonance is observed with a single interaction zone.