9:30 AM - 9:45 AM
[SGD01-03] Introduction of Absolute Quantum Gravimeter (AQG)
Keywords:AQG, FG5, gravity
The Geospatial Information Authority of Japan (GSI) introduced an Absolute Quantum Gravimeter (AQG) made by Muquans in France for the first time in Japan.
AQG is a gravimeter based on atomic interferometry, which measures the gravitational acceleration by dropping an object freely as well as a conventional absolute gravimeter FG5 does. The difference between FG5 and AQG is that AQG drops Rubidium atoms cooled down below 2 μK while FG5 drops a reflective test mass. In particular, FG5 has easily worn moving mechanical parts that make it unsuitable for long-term continuous measurement. On the other hand, AQG which does not have any moving mechanical parts unlike FG5 enables long-term continuous measurement with low maintenance. In addition, AQG is easy to set up and the adjustment for measurement is done almost automatically by the software, so that even unexperienced engineers can start measurement immediately.
In this presentation, the features of the newly installed AQG will be introduced and the results of comparison with the gravity values measured by FG5 will be reported.
AQG is a gravimeter based on atomic interferometry, which measures the gravitational acceleration by dropping an object freely as well as a conventional absolute gravimeter FG5 does. The difference between FG5 and AQG is that AQG drops Rubidium atoms cooled down below 2 μK while FG5 drops a reflective test mass. In particular, FG5 has easily worn moving mechanical parts that make it unsuitable for long-term continuous measurement. On the other hand, AQG which does not have any moving mechanical parts unlike FG5 enables long-term continuous measurement with low maintenance. In addition, AQG is easy to set up and the adjustment for measurement is done almost automatically by the software, so that even unexperienced engineers can start measurement immediately.
In this presentation, the features of the newly installed AQG will be introduced and the results of comparison with the gravity values measured by FG5 will be reported.