Title :
Progress in the Measurement of the Gravitational Constant using a Cryogenic Torsion Pendulum
Author :
Berg, E.C. ; Bantel, M.K. ; Newman, R.D.
Author_Institution :
Dept. of Phys. & Astron., California Univ., Irvine, CA
Abstract :
Continuing measurements of G are being made using a cryogenic torsion pendulum in the "dynamic" (time-of-swing) mode. The total metrology contribution to the G error budget is about 7 ppm. Data runs are being conducted using both CuBe and A15056 torsion fibers to test for systematic fiber-dependent effects
Keywords :
cryogenics; gravitational constant; gravity; pendulums; A15056 torsion fibers; CuBe; cryogenic torsion pendulum; gravitational constant measurement; systematic fiber-dependent effects; time-of-swing mode; Cryogenics; Extraterrestrial measurements; Frequency measurement; Helium; Magnetic levitation; Noise reduction; Optical fiber testing; Optical noise; Superconducting device noise; Temperature control;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305348
