"The core of the atomic clock is a microwave cavity containing the ionized gas, a tunable microwave radio oscillator, and a feedback loop which is used to adjust the oscillator to the exact frequency of the absorption characteristic defined by the behavior of the individual atoms."

Well, if I'd known THAT two hours ago I would have jimmied one together and the state of the turkey would be no problem. It's like this: stick a candle in the bird, and light the candle. When the candle burns down, and the feathers catch fire, the turkey is done.