https://tipclub2.com/

Our clock, he says, "is not just an evolutionary change in performance – it's a discrete step in technology. It was forty or fifty years ago that the tech [trapped ion atomic clocks] was first invented but so far it's eluded clocks in space. From an atomic physics theoretical standpoint, the question is, how link cold link can you get the ion – the link ultimate goal was always, how do you produce a clock. We chose a particular ion that had very little sensitivity to environmental perturbations."