Tag Archives: CAD

Wirelessly powered non-magnetic rotary actuator

(image of mechanism #77 from Henry T. Brown’s Five Hundred and Seven Mechanical Movements, via 507movements.com) The leading systematic uncertainty in our group’s test of the equivalence principle is variations in the local gravity gradient.  The gravity gradient is the spatial derivative of the gravitational field—the amount of change in the strength and … Continue … Continue reading Wirelessly powered non-magnetic rotary actuator

Low-energy electron gun

As an offshoot of our torsion-balance experiments, our group was involved in technology development for the Laser Interferometer Space Antenna, a proposed three-spacecraft space mission to detect gravity waves. These spacecraft were to stay in a perfect free-fall orbit by tracking a free-floating “test mass” contained within each spacecraft. We were investigating the … Continue … Continue reading Low-energy electron gun