Objective The aim of our Project is to carry out theoretical and experimental studies for developing a high-stability Rubidium vapour-cell frequency standard meeting the requirements of future GNSS on-board clocks: short-term stability below 1.10-12 at one second (with an objective of 5.10-13) and a daily frequency stability of below 1.10-14 (with an objective of 5.10-15). In the project the laser optical pumping and coherent population trapping (CPT) in Rubidium cells with buffer gases mixture and with anti-relaxation wall-coating will be investigated both theoretically and experimentally applied to on-board atomic frequency standards. The special cells filled by 87Rb isotope and with anti-relaxation wall-coating will be developed, manufactured and experimentally studied, especially for the relaxation processes on the ground states of 87Rb atoms with lamp and laser pumping. The breadboards of discriminators operating with cells filled by a buffer gas mixture and with wall-coating will be developed, studied and optimized both theoretically and experimentally. The most efficient excitation schemes in Rb discriminator based on the CPT effect will be studied. A theoretical basis for developing atomic frequency discriminators based on gas cell - with anti-relaxation wall-coating or with buffer gases - will be developed. For the realization of the stated goals, computer programs for multi-factor optimization of Rb laser-pumped atomic vapour frequency discriminator based on CPT effect as well as on double radio-optical resonance for both cells with wall-coating and those without it for achieving the highest short-term frequency stability of standard will be developed and used. As a result, it is expected that the method of laser pumping with using the cells filled by a buffer gas optimized mix and with wall-coating will improve the stability of atomic frequency standards down to below 1.10-12 on one second and below 1.10-14 on one day. The phenomena of CPT will be investigated in order to estimate the possibility of frequency stability improvement of Rb gas cell standard down to the same specifications. Keywords Atomic & Molecular Spectroscopy Atomic and Molecular Theories Experiments & Payloads Quantum Theories Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator UNIVERSITY OF NEUCHÂTEL EU contribution No data Address RUE A. L. BRÉGUET, 1 NEUCHÂTEL Switzerland See on map Total cost No data Participants (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all CENTRE NATIONAL D'ETUDES SPATIALES (CNES) France EU contribution No data Address AVENUE EDOUARD BELIN, 18 TOULOUSE See on map Total cost No data FEDERAL STATE SCIENTIFIC PRODUCTION ENTERPRISE "GEOLOGORAZVEDKA" Russia EU contribution No data Address KNIPOVICH STR., 11/2 ST.PETERSBURG See on map Total cost No data RUSSIAN INSTITUTE FOR RADIONAVIGATION AND TIME Russia EU contribution No data Address RASTRELLI SQ., 2 ST.PETERSBURG See on map Total cost No data ST.PETERSBURG STATE POLYTECHNICAL UNIVERSITY Russia EU contribution No data Address POLYTEKHNICHESKAYA, 29 ST.PETERSBURG See on map Total cost No data
