Experimental techniques for gyroscope performance enhancement for the Gravity Probe B relativity mission

Autor:	Saps Buchman, Mac Keiser, Gregory M. Gutt, J. P. Turneaure, Doron Bardas, Francis Everitt, Y. M. Xiao, J. M. Lockhart, M. Taber, Barry Muhlfelder, D. Gill, Robert W. Brumley, John Mester, Brian DiDonna, B. W. Parkinson
Rok vydání:	1996
Předmět:	Physics Gravity (chemistry) Physics and Astronomy (miscellaneous) Magnetometer business.industry Polar orbit Gyroscope Frame-dragging Noise figure law.invention Theory of relativity Optics law Electromagnetic shielding business
Zdroj:	Classical and Quantum Gravity. 13:A185-A191
ISSN:	1361-6382 0264-9381
Popis:	The Gravity Probe B relativity mission experiment is designed to measure the frame dragging and geodetic relativistic precessions in a 650 km polar orbit. We describe some of the advanced experimental techniques used to achieve the required gyroscope accuracy of between 0.05 and . The subjects discussed are: (i) the development of high-precision gyroscopes with drift rates of less than , (ii) a low-temperature bake-out procedure resulting in a helium pressure of less than at 2.5 K, (iii) a read-out system using DC SQUID magnetometers with a noise figure of at 5 mHz and (iv) AC and DC magnetic shielding techniques which produce an AC attenuation factor in excess of and a residual DC field of less than .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6db52fb0131a488f6a5e0082f50004ca https://doi.org/10.1088/0264-9381/13/11a/026 Zobrazit plný text záznamu