Prospects of high sensitivity atomic interferometer development for current gravimetry

2020 ◽  
pp. 9-12
Author(s):  
M.S. Aleynikov ◽  
V.N. Baryshev ◽  
I.Y. Blinov ◽  
D.S. Kupalov ◽  
G.V. Osipenko
Keyword(s):  
Cold Atoms ◽  
High Sensitivity ◽  
Frequency Standard ◽  
Vacuum System ◽  
Acceleration Measurement ◽  
Rubidium Atoms ◽  
Atomic Interferometer ◽  
Atomic Fountain ◽  
Absolute Measurements ◽  
Free Falling

A review of the experimental results achieved in the process of atomic fountain clocks construction at “VNIIFTRI” is presented. A possibility of the application of achieved results to the development of a sensitive interferometer (gravimeter) based on cold rubidium atoms is analyzed. The relevance of the study is in the estimation of perspective of interferometer (gravimeter) based on cold atoms for absolute measurements of local free-falling constant development. Physical fundamentals of atomic gravimeter’s operation are described. A comparison between atomic gravimeter and atomic quantum frequency standard based on cold atoms is done. Engineering solutions, that are necessary for building atomic gravimeter with required sensitivity of free-falling acceleration measurement are suggested. In order to build a gravimeter with a sensitivity reaching 1 μGal/Hz1/2 the estimations of laser phase noise, residual gas pressure in vacuum system and magnetic shielding system’s parameters are made.

The optical frequency standard based on strontium cold atoms

2020 ◽  
pp. 22-27
Author(s):  
A. Y. Gribov ◽  
O. I. Berdasov ◽  
G. S. Belotelov ◽  
E. F. Stelmashenko ◽  
D. V. Sutyrin ◽  
...  
Keyword(s):  
Laser Cooling ◽  
Optical Lattice ◽  
Cold Atoms ◽  
Frequency Synthesizer ◽  
Primary Standard ◽  
Frequency Standard ◽  
Optical Frequency ◽  
Optical Frequency Standard ◽  
Laser Cooling And Trapping ◽  
Measuring Scheme

The results obtained during the development of an optical frequency standard, based on cold 87Sr atoms are presented. The parameters of experimental optical schemes developed for the realization of all stages of sequential laser cooling and trapping of 87Sr atoms into an optical lattice are described. Clock transition spectroscopy was successfully performed with a spectral transition linewidth of 12 Hz. A measuring scheme based on a femtosecond optical frequency synthesizer has been developed, which makes it possible to compare the optical standard with a hydrogen maser. The created optical frequency standard was included in the primary standard GET 1-2018.

Study on Practical FBG Acceleration System

2011 ◽  
Vol 346 ◽  
pp. 546-550
Author(s):  
Wei Guang Zhang ◽  
Jian Zhang
Keyword(s):  
System Application ◽  
High Frequency ◽  
High Sensitivity ◽  
Acceleration Measurement ◽  
Cross Sensitivity ◽  
Loop Control ◽  
Sensitivity Problem ◽  
Micro Vibration ◽  
Low Sensitivity ◽  
Close Loop Control

A micro vibration, high sensitivity FBG demodulation system with close loop control is presented. By introducing a close loop control, the difficulty in matched FBG making process is overcame. Further more, the FBG strain-temperature cross sensitivity problem is settled. And low sensitivity in high frequency of cantilever FBG accelerator is overcame either. An example of the system application in acceleration measurement is introduced.

Reply to comment on ‘Accurate rubidium atomic fountain frequency standard’

Metrologia ◽  
2011 ◽  
Vol 48 (5) ◽  
pp. 448-449 ◽  
Author(s):  
Yuri Ovchinnikov ◽  
Giuseppe Marra
Keyword(s):  
Frequency Standard ◽  
Atomic Fountain

Eine Methode zur Messung geringster Ölbedeckungen in Vakuumsystemen

1967 ◽  
Vol 22 (4) ◽  
pp. 549-553 ◽  
Author(s):  
R. Dobrozemsky ◽  
W. K. Huber ◽  
F. Viehböck
Keyword(s):  
High Vacuum ◽  
High Sensitivity ◽  
Radioactive Tracer ◽  
Operating Conditions ◽  
Ultra High Vacuum ◽  
Vacuum System ◽  
First Results ◽  
Tracer Isotope ◽  
Radioactive Tracer Method ◽  
Vacuum Systems

To get information on extremely small organic deposits in ultra high vacuum systems the sensitivity of most of the conventional methods for thickness measurements is not high enough. On the other hand the radioactive tracer method has shown its high sensitivity and wide versatility in many fields. Tritium with a half life of 12.3 γ and a mean β-energy of 5.4 keV was choosen as tracer isotope. A method is described for Tritium-labelling diffusion pump oils with specific activities up to 100 mC/g. Using the liquid scintillation counting technique one can detect deposits down to below 1010 molecules/cm2. First results with this Tritium labelled pump fluid are given under different operating conditions in an all metal ultra high vacuum system.

Design of the Ion Trap and Vacuum System for 171Yb-ion Optical Frequency Standard

MAPAN ◽  
2015 ◽  
Vol 30 (3) ◽  
pp. 169-174 ◽  
Author(s):  
A. Rastogi ◽  
N. Batra ◽  
A. Roy ◽  
J. Thangjam ◽  
V. P. S. Kalsi ◽  
...  
Keyword(s):  
Ion Trap ◽  
Frequency Standard ◽  
Vacuum System ◽  
Optical Frequency ◽  
Optical Frequency Standard
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