Measurement of the quality factor of a new low-frequency differential accelerometer for testing the equivalence principle
- V., Iafolla
- C., Lefevre
- E., Fiorenza
- F., Santoli
- S., Nozzoli
- C., Magnafico
- M., Lucente
- D., Lucchesi
- R., Peron
- I. I., Shapiro
- S., Glashow
- Lorenzini, Enrico
DOIAbstract
A cryogenic differential accelerometer has been developed to test the weak equivalence principle to a few parts in 10^15 within the framework of the general relativity accuracy test in an Einstein elevator experiment. The prototype sensor was designed to identify, address, and solve the major issues associated with various aspects of the experiment. This paper illustrates the measurements conducted on this prototype sensor to attain a high quality factor (Q 3c 10^5) at low frequencies (<20 Hz). Such a value is necessary for reducing the Brownian noise to match the target acceleration noise of 10 1214 g/ 1aHz, hence providing the desired experimental accuracy. \ua9 2014 AIP Publishing LLC
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