No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
The effects of patch-potentials on the gravity probe B gyroscopes
2. C. W. F. Everitt, Near Zero: New Frontiers of Physics, edited by J. D. Fairbank, B. S. Deaver Jr., C. W. F. Everitt, and P. F. Michelson (W. H. Freeman and Company, New York, 1988), pp. 587–639.
3. S. Buchman, C. W. F. Everitt, B. Parkinson, J. P. Turneaure, D. DeBra, D. Bardas, W. Bencze, R. Brumley, D. Gill, G. Gutt, D. H. Gwo, G. M. Keiser, J. Lipa, J. Lockhart, J. Mester, B. Muhlfelder, M. Taber, S. Wang, Y. Xiao, and P. Zhou, Adv. Space Res. 25(6), 1177 (2000).
4. R. R. Ransom, N. Bartel, M. F. Bietenholz, M. I. Ratner, D. E. Lebach, I. I. Shapiro, and J. F. Lestrade, in Proceedings of the ASP Conference on the 10th anniversary of the VLBA, 2005, edited by J. Romney and M. Reid (Astronomical Society of the Pacific, San Francisco, 2005), Vol. 340, pp. 506–510.
5. C. M. Will, Living Rev. Relativity 9, 3 (2005).
6. M. I. Heifetz, C. W. F. Everitt, G. M. Keiser, and A. S. Silbergleit, in Proceedings of the 8th Marcel Grossman Meeting on General Relativity, Part A, Jerusalem, Israel, edited by T. Piran (World Scientific, Singapore, 1999), pp. 259–268.
10. C. W. F. Everitt, D. B. DeBra, B. W. Parkinson, J. P. Turneaure, J. W. Conklin, M. I. Heifetz, G. M. Keiser, A. S. Silbergleit, T. Holmes, J. Kolodziejczak, M. Al-Meshari, J. C. Mester, B. Muhlfelder, V. G. Solomonik, K. Stahl, P. W. Worden Jr., W. Bencze, S. Buchman, B. Clarke, A. Al-Jadaan, H. Al-Jibreen, J. Li, J. A. Lipa, J. M. Lockhart, B. Al-Suwaidan, M. Taber, and S. Wang, Phys. Rev. Lett. 106, 221101 (2011).
13. F. London, Superfluids (Dover, New York, 1964), p. 83.
14. P. Zhou, S. Buchman, K. Davis, C. Gray, and J. P. Turneaure, Surf. Coat. Technol. 76–77, 516–520 (1995).
15. H. Goldstein, Classical Mechanics (Addison-Wesley, Reading, MA, 1972), p. 161.
17. N. A. Robertson, J. R. Blackwood, S. Buchman, R. L. Byer, J. Camp, D. Gill, J. Hanson, S. Williams, and P. Zhou, Class. Quantum Grav. 23, 2665 (2006).
18. P. Zhou, S. Buchman, W. Bencze, J. P. Turneaure, and C. W. F. Everitt, in Materials Science and Technology (MS&T) 2006, Processing Materials Science and Technology.
19. D. K. Gill and S. Buchman, Bulletin of the American Physical Society 2007 APS April Meeting, Jacksonville, FL, Vol 52, No. 3.
20. M. E. Rose, Elementary Theory of Angular Momentum (Dover, New York, 1995) pp. 48–57.
21. P. Shestople, J. Li, A. Ndili, and K. Schrock, in Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation ION GNSS, (2004), 21-24 September 2004, Long Beach Convention Center, Long Beach, CA, pp. 2676–2681.
22. A. Silbergleit, J. Conklin, D. DeBra, M. Dolphin, G. Keiser, J. Kozaczuk, D. Santiago, M. Salomon, and P. Worden, Space Sci. Rev. 148, 397 (2009).
23. J. W. Conklin, “Estimation of the mass center and dynamics of a spherical test mass for gravitational reference sensors,” Ph.D. dissertation, Stanford University, 2008, p. 102.
24. B. W. Parkinson and B. O. Lange, The active damping of free-rotor gyros, Guidance and Control Laboratory, Stanford University, May 1966.
25. A. S. Silbergleit, Free motion of GP-B gyros in the presence of a weak dissipation, Internal Gravity Probe B manuscript, Stanford University, 2005.
27. E. Fei, “Physics Department Senior Thesis,” M.S. thesis, Stanford University, 2007.
Article metrics loading...
Gravity probe B (GP-B) was designed to measure the geodetic and frame dragging precessions of gyroscopes in the near field of the Earth using a drag-free satellite in a 642 km polar orbit. Four electrostatically suspended cryogenic gyroscopes were designed to measure the precession of the local inertial frame of reference with a disturbance drift of about 0.1 marc sec/yr–0.2 marc sec/yr. A number of unexpected gyro disturbance effects were observed during the mission: spin-speed and polhode damping, misalignment and roll-polhode resonance torques, forces acting on the gyroscopes, and anomalies in the measurement of the gyro potentials. We show that all these effects except possibly polhode damping can be accounted for by electrostatic patch potentials on both the gyro rotors and the gyro housing suspension and ground-plane electrodes. We express the rotor and housing patch potentials as expansions in spherical harmonics Y l,m (θ,ϕ). Our analysis demonstrates that these disturbance effects are approximated by a power spectrum for the coefficients of the spherical harmonics of the form with V 0 ≈ 100 mV and r ≈ 1.7.
Full text loading...
Most read this month