Title :
High stability 40 Kelvin cryo-cooled sapphire oscillator
Author :
Wang, Rabi T. ; Dick, G. John
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
We present initial test results for a new short-term frequency standard, the 40 K compensated sapphire oscillator (40 K CSO). Included are measurements of resonator quality factor, operational frequency, turn-over temperature, acceleration (g) sensitivity, frequency drift, and preliminary frequency stability tests. Long-term operation is facilitated use of a small cryo-cooler (1 KW wall power) with no moving cryogenic parts, and thus no preset service interval for the cold head. Initial tests with this single-stage pulse-tube cooler show a stability of 3×10-14 (1 second ≤τ≤10 seconds) and a flicker floor of 2×10-14.
Keywords :
Q-factor; cryogenic electronics; crystal oscillators; frequency stability; frequency standards; sapphire; 1 kW; 1 to 10 S; 40 K; Al2O3; acceleration sensitivity; compensated sapphire oscillator; cryocooled sapphire oscillator; frequency stability; frequency standard; operational frequency; resonator quality factor; single stage pulse cooler; Accelerometers; Cryogenics; Frequency measurement; Kelvin; Life estimation; Oscillators; Q factor; Stability; Temperature sensors; Testing;
Conference_Titel :
Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003 IEEE International
Print_ISBN :
0-7803-7688-9
DOI :
10.1109/FREQ.2003.1275118
