Measurement of the quality factor of a new low-frequency differential accelerometer for testing the equivalence principle
Shapiro, Irwin Ira
Lorenzini, E. C.Note: Order does not necessarily reflect citation order of authors.
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CitationIafolla, V., C. Lefevre, E. Fiorenza, F. Santoli, S. Nozzoli, C. Magnafico, M. Lucente, et al. 2014. “Measurement of the Quality Factor of a New Low-Frequency Differential Accelerometer for Testing the Equivalence Principle.” Review of Scientific Instruments 85 (1) (January): 014502. doi:10.1063/1.4861349. http://dx.doi.org/10.1063/1.4861349.
AbstractA cryogenic differential accelerometer has been developed to test the weak equivalence principle to a few parts in 1015 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 ∼ 105) at low frequencies (<20 Hz). Such a value is necessary for reducing the Brownian noise to match the target acceleration noise of 10−14 g/√Hz, hence providing the desired experimental accuracy.
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