JILA Science Seminar - Hiutat Yang

Event Title: A Prototype of a Commercial Optical Lattice Clock Abstract: As microwave atomic clocks have advanced, a wide range of practical products have been developed for timekeeping and synchronization. Optical clocks have surpassed microwave primary frequency standards in accuracy, opening new applications such as relativistic geodesy. Realizing these applications requires practical instruments capable of delivering reliable frequency performance in field environments. We present a 250-litter strontium optical lattice clock prototype developed in collaboration with industry. We briefly describe the system architecture and evaluate its frequency performance, focusing on the background-gas collision shift, which, to our knowledge, has been experimentally characterized only once before. We independently measured the shift by increasing the background-gas pressure under conditions where H₂ was the dominant residual species. The result was consistent with the previously reported value...