scholarly journals Dynamical response of the Galileo Galilei on the ground rotor to test the equivalence principle: Theory, simulation, and experiment. I. The normal modes

2006 ◽  
Vol 77 (3) ◽  
pp. 034501 ◽  
Author(s):  
G. L. Comandi ◽  
M. L. Chiofalo ◽  
R. Toncelli ◽  
D. Bramanti ◽  
E. Polacco ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Normal Modes ◽  
Dynamical Response ◽  
Galileo Galilei ◽  
Simulation And Experiment ◽  
Principle Theory

scholarly journals “Galileo Galilei” (GG) a small satellite to test the equivalence principle of Galileo, Newton and Einstein

2009 ◽  
Vol 23 (2) ◽  
pp. 689-710 ◽  
Author(s):  
Anna M. Nobili ◽  
Gian Luca Comandi ◽  
Suresh Doravari ◽  
Donato Bramanti ◽  
Rajeev Kumar ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Small Satellite ◽  
Galileo Galilei

‘Galileo Galilei’ (GG): space test of the weak equivalence principle to 10 −17 and laboratory demonstrations

2012 ◽  
Vol 29 (18) ◽  
pp. 184011 ◽  
Author(s):  
A M Nobili ◽  
M Shao ◽  
R Pegna ◽  
G Zavattini ◽  
S G Turyshev ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Weak Equivalence ◽  
Galileo Galilei ◽  
Weak Equivalence Principle

`Galileo Galilei' (GG) small-satellite project: an alternative to the torsion balance for testing the equivalence principle on Earth and in space

2000 ◽  
Vol 17 (12) ◽  
pp. 2347-2349 ◽  
Author(s):  
A M Nobili ◽  
D Bramanti ◽  
E Polacco ◽  
I W Roxburgh ◽  
G Comandi ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Torsion Balance ◽  
Small Satellite ◽  
Galileo Galilei

The “Galileo Galilei” (GG) project: Testing the Equivalence Principle in space and on Earth

2000 ◽  
Vol 25 (6) ◽  
pp. 1231-1235 ◽  
Author(s):  
A.M Nobili ◽  
D Bramanti ◽  
E Polacco ◽  
G Catastini ◽  
A Anselmi ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Galileo Galilei

EXPERIMENTAL VALIDATION OF A HIGH ACCURACY TEST OF THE EQUIVALENCE PRINCIPLE WITH THE SMALL SATELLITE “GALILEO GALILEI”

2009 ◽  
pp. 387-398
Author(s):  
ANNA M. NOBILI ◽  
GIAN LUCA COMANDI ◽  
SURESH DORAVARI ◽  
FRANCESCO MACCARRONE ◽  
DONATO BRAMANTI ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Experimental Validation ◽  
High Accuracy ◽  
Small Satellite ◽  
Galileo Galilei ◽  
Accuracy Test

EXPERIMENTAL VALIDATION OF A HIGH ACCURACY TEST OF THE EQUIVALENCE PRINCIPLE WITH THE SMALL SATELLITE "GALILEO GALILEI"

2007 ◽  
Vol 16 (12a) ◽  
pp. 2259-2270 ◽  
Author(s):  
ANNA M. NOBILI ◽  
GIAN LUCA COMANDI ◽  
SURESH DORAVARI ◽  
FRANCESCO MACCARRONE ◽  
DONATO BRAMANTI ◽  
...  
Keyword(s):  
Equivalence Principle ◽  
Symmetry Axis ◽  
High Sensitivity ◽  
Momentum Conservation ◽  
Small Satellite ◽  
Orbit Plane ◽  
Galileo Galilei ◽  
Long Term Stability ◽  
Accuracy Test ◽  
Weakly Coupled

The small satellite "Galileo Galilei" (GG) has been designed to test the equivalence principle (EP) to 10-17 with a total mass at launch of 250 kg. The key instrument is a differential accelerometer made up of weakly coupled coaxial, concentric test cylinders rapidly spinning around the symmetry axis and sensitive in the plane perpendicular to it, lying at a small inclination from the orbit plane. The whole spacecraft spins around the same symmetry axis so as to be passively stabilized. The test masses are large (10 kg each, to reduce thermal noise), their coupling is very weak (for high sensitivity to differential effects), and rotation is fast (for high frequency modulation of the signal). A 1 g version of the accelerometer ("Galileo Galilei on the Ground" — GGG) has been built to the full scale — except for coupling, which cannot be as weak as in the absence of weight, and a motor to maintain rotation (not needed in space due to angular momentum conservation). GGG has proved: (i) high Q; (ii) auto-centering and long term stability; (iii) a sensitivity to EP testing which is close to the target sensitivity of the GG experiment provided that the physical properties of the experiment in space are going to be fully exploited.

Sign in / Sign up

Export Citation Format

Share Document