منابع مشابه
Electrostatically suspended torsion pendulum
A torsion pendulum without a torsion wire has been designed and realized, in order to measure very weak forces. The arm of this torsion pendulum ~5.40 g, 1.32310 kg m of inertia! is electrostatically suspended. Its 6 degrees of freedom are controlled thanks to electrostatic forces, and capacitive position sensing with a noise spectral density between 10 and 10 m/AHz. The torque noise spectral d...
متن کامل3He in a Torsion Pendulum
We present results of the Q−1 and period shift, P , for 3He confined in a 98% nominal open aerogel on a torsion pendulum. The aerogel is compressed uniaxially by 10% along a direction aligned to the torsion pendulum axis and was grown within a 400 μm tall pancake (after compression) similar to an Andronikashvili geometry. The result is a high Q pendulum able to resolve Q−1 and mass coupling of ...
متن کاملResults and Discussion Torsion Pendulum
NASA/JSC is implementing an advanced propulsion physics laboratory, informally known as "Eagleworks", to pursue propulsion technologies necessary to enable human exploration of the solar system over the next 50 years, and enabling interstellar spaceflight by the end of the century. This work directly supports the "Breakthrough Propulsion" objectives detailed in the NASA OCT TA02 In-space Propul...
متن کاملOptimizing a Rotating Tilt Sensor for the LISA Torsion Pendulum
The Eöt-Wash group at the University of Washington has developed a torsion pendulum to investigate noise sources in the Laser Interferometer Space Antenna (LISA) caused by small forces acting on its test masses. To ensure a high amount of accuracy in the torsion pendulum’s measurements, the platform upon which the pendulum rests must remain as level as possible. The use of a rotating tilt senso...
متن کاملLaboratory Tests of Gravitational Physics Using a Cryogenic Torsion Pendulum
Progress and plans are reported for a program of gravitational physics experiments using cryogenic torsion pendula undergoing large amplitude torsional oscillation. The program includes a UC Irvine project to measure the gravitational constant G and joint UC Irvine– U. Washington projects to test the gravitational inverse square law at a range of about 10 cm and to test the weak equivalence pri...
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ژورنال
عنوان ژورنال: Polymer Testing
سال: 1990
ISSN: 0142-9418
DOI: 10.1016/0142-9418(90)90025-9