45 citations · 118 across the 6 of their papers we have counts for
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physics.ins-det2012★ 88 cited
Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with 1 x 10^-16 frequency instability
John G. Hartnett, Nitin R. Nand, Chuan Lu
Two nominally identical ultra-stable cryogenic microwave oscillators are compared. Each incorporates a dielectric-sapphire resonator cooled to near 6 K in an ultra-low vibration cr…
physics.ins-det2010★ 1 cited
Stability measurements of microwave frequency synthesis with liquid helium cooled cryogenic sapphire oscillators
J. G. Hartnett, D. L. Creedon, D. Chambon +1
We report on the evaluation of microwave frequency synthesis using two cryogenic sapphire oscillators developed at the University of Western Australia. A down converter is used to…
physics.ins-det2010★ 30 cited
Ultra-low vibration pulse-tube cryocooler stabilized cryogenic sapphire oscillator with 10^-16 fractional frequency stability
John G. Hartnett, Nitin R. Nand
A low maintenance long-term operational cryogenic sapphire oscillator has been implemented at 11.2 GHz using an ultra-low-vibration cryostat and pulse-tube cryocooler. It is curren…