Atomic Clocks and Frequency Standard on an Ammonia Line. I.

Various causes of errors in an atomic clock utilizing the 3–3 line of ammonia are examined theoretically and experimentally A brief description of a Stark modulation atomic clock designed for experimental purposes is given. It is shown that the fractional error will exceed 1 part in 10 -8 , unless high degree of frequency-insensitive multiplier output and excellent matching of waveguide to generator and detector are achieved.