Results 11 to 20 of about 4,797 (280)
The ac stark shift and space-borne rubidium atomic clocks [PDF]
Journal of Applied Physics, 2016 Due to its small size, low weight, and low power consumption, the Rb atomic frequency standard (RAFS) is routinely the first choice for atomic timekeeping in space. Consequently, though the device has very good frequency stability (rivaling passive hydrogen masers), there is interest in uncovering the fundamental processes limiting its long-term ...
Formichella, V. +6 more
openaire +3 more sources
New miniaturized microwave cavity for Rubidium atomic clocks [PDF]
2012 IEEE Sensors, 2012 Nowadays there is an increasing need for radically miniaturized and low-power atomic frequency standards, for use in mobile and battery-powered applications. For the miniaturization of double-resonance (DR) Rubidium (87Rb) atomic clocks, the size reduction of the microwave cavity or resonator (MWR) to well below the wavelength of the atomic transition (
Violetti M. +6 more
openaire +3 more sources
Remote Sensing, 2022 The quality of satellite clock offset affects the performances of positioning, navigation and timing services, and thus it is essential to the Global Navigation Satellite System (GNSS).
Hu Wang +5 more
doaj +1 more source
Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning
Remote Sensing, 2021 The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu +5 more
doaj +1 more source
Improved rubidium atomic beam clock based on lamp-pumping and fluorescence-detection scheme [PDF]
Journal of the European Optical Society-Rapid Publications, 2011 A compact, portable rubidium atomic beam clock based on lamp-pumping and fluorescence-detection scheme is proposed. The expected short-term frequency stability can be at least three orders of magnitude better than that of previous experimental results ...
Wang Y. H. +5 more
doaj +1 more source
Remote Sensing, 2022 Satellite atomic clocks are the key elements for position, navigation, and timing services of the Global navigation satellite system (GNSS); it is necessary to research the characteristics of BDS-3 on-orbit satellite atomic clocks for their further ...
Yifeng Liang +3 more
doaj +1 more source
Microfabricated chip-scale rubidium plasma light source for miniature atomic clocks [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2012 We present the microfabrication and characterization of a low-power, chip-scale Rb plasma light source, designed for optical pumping in miniature atomic clocks. A dielectric barrier discharge (DBD) configuration is used to ignite a Rb plasma in a micro-fabricated Rb vapor cell on which external indium electrodes were deposited.
Venkatraman V. +5 more
openaire +2 more sources
A Scheme for Generating Discontinuous Microwave Inquiry Signal in Rubidium Atomic Frequency Standard
Chinese Journal of Magnetic Resonance, 2020 The microwave probing signal of the rubidium atomic frequency standard (RAFS) is used to excite the transitions between the ground-state energy levels of rubidium atoms, and realize resonance detection.
BAO Wan-jing +4 more
doaj +1 more source
Observing Spin-Squeezed States under Spin-Exchange Collisions for a Second
PRX Quantum, 2023 Using the platform of a trapped-atom clock on a chip, we observe the time evolution of spin-squeezed hyperfine clock states in ultracold rubidium atoms on previously inaccessible time scales up to 1 s.
Meng-Zi Huang +7 more
doaj +1 more source
Active optical clock based on four-level quantum system [PDF]
, 2012 Active optical clock, a new conception of atomic clock, has been proposed recently. In this report, we propose a scheme of active optical clock based on four-level quantum system.
A C Ji +26 more
core +2 more sources