An ultra high vacuum low temperature gyroscope clock

✍ Scribed by T. Walter; J.P. Turneaure; S. Buchman; C.W.F. Everitt; G.M. Keiser

• Book ID: 104356662
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 217 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(90)80927-b

✦ Synopsis

We propose to perform a null-gravitational tedshift experiment by comparing a mechanical gyroscope clock with atomic clocks. The Gravity-Probe-B Relativity Gyroscope Experiment provides the opportunity for this co-experiment. The goal is to measure the effect to an accuracy of 0.01% of the gravitational redshift due to the eccentricity of the orbit of the earth about the sun. This corresponds to an integrated frequency measurement over one year of A~/v=3*10-~~. A major disturbance torque on the gyroscope is due to fluctuations in the molecular drag of the residual gas caused by temperature variations. We propose to use a low temperature bake-out technique in order to achieve the required vacuum of lO-17torr.