ИСТИНА

At the first stage of research a gyroscope compartment and spherical imitator of the rotating rotor in the form of the 30 mm diameter sphere have been fabricated, montaged with the SQUID in the deep stick with a lead shield inside a plastic helium cryostat. Seven two-winding coils were placed at the surface of the rotor in the range 0 – 90 angle degrees. Two variants of the read-out design have been tested: in the former a SQUID magnetometer pick-up loop was placed at the diameter of imitator of the rotor that was similar to realization [1], in the latter the pick-up loop was placed outside of the imitator with the aim to test possibility to realize the 3-axis read-out scheme from one rotor. In the first case values of transfer function К in the range 0.01 – 0.0016 Ф0/arc second depending on the magnitude of the angle between the test coil and pick-up loop has been obtained. In the second case when the pick up loop was placed at the altitude of 6 mm apart a polar zone of the imitator values of K almost of two orders of magnitude less were found. During experiments a SQUID read-out demonstrated sensitivity close to 1 fT/Hz1/2 and 0.23 nT/Ф0 field to flux transfer factor at frequencies higher than 100 Hz. 1. Gravity Probe B Science Results—NASA Final Report (2008) 2. C.W. F. Everitt, D. B. De Bra, B.W. Parkinson, et al, PRL 106, 221101 (2011) 3. B.E. Landay, A.A. Belash, S.S. Gurevich, et al, Journal of Instrument Engineering (Russian: “Izvestiya vysshikh uchebnykh zavedeniy. Priborostroenie”) vol. 54, no. 6, pp. 66 -74 (2011)