| Autor: |
Buchman, Saps, Taber, Mike, Lockhart, Jim, Muhlfelder, Barry, Everitt, C., Turneaure, J., Parkinson, Brad |
| Zdroj: |
Czechoslovak Journal of Physics; May 1996, Vol. 46 Issue: Supplement 5 p2869-2870, 2p |
| Abstrakt: |
Abstract: Techniques based on superconductivity are crucial in providing the means of achieving the high accuracy and low noise required by experimental tests of gravitational theories. We discuss applications of superconductivity to two space-based experiments: the Gravity Probe B Relativity Mission (GP-B), and the Satellite Test of the Equivalence Principle (STEP). Superconducting shields attenuate the dc magnetic field to less than 10−11 T and provide an ac shielding factor in excess of 1012. The readout of the GP-B gyroscopes is based on the London magnetic dipole generated by a rotating superconductor and detected with state-of-the-art dc SQUIDs, which are also used in STEP. |
| Databáze: |
Supplemental Index |
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