Nice find. This pioneering atomic beam experiment is the basis for cesium-beam atomic clocks, even today. Among other later innovations, I. I. Rabi added magnets and a microwave EM field for quantum state selection, and Norman Ramsey discovered how to optimize the beam's interaction with the field for the best clock performance.
The professor in this video, Jerrold Zacharias, also famously spent a lot of time and money trying to build a cesium fountain clock back in the 60s. He never succeeded, but NIST and other researchers eventually did (https://www.nist.gov/pml/time-and-frequency-division/time-re...).
The professor in this video, Jerrold Zacharias, also famously spent a lot of time and money trying to build a cesium fountain clock back in the 60s. He never succeeded, but NIST and other researchers eventually did (https://www.nist.gov/pml/time-and-frequency-division/time-re...).