Reaction wheels
In a reaction wheel, a mass is attached to a motor. If the motor is driven in zero gravity and the mass is set in rotation, this also generates a counter rotation of the rest of the carrier.
Reactive ion deep etching
Reactive ion deep etching (also known as the Bosch process) is a dry etching process that produces a particularly anisotropic etch profile. Through an iterative process sequence of etching and passivation, the sidewalls of the material can be protected in already etched cavities, creating very deep structures.
Reactive ion deep etching
Reactive ion deep etching – also known as the Bosch process – is a dry etching process that can be used to create anisotropic etch profiles in silicon. This is possible thanks to the two steps, etching and passivation, which are carried out alternately.
Rubidium
Rubidium (Rb) is a chemical element, belongs to the group of alkali metals and is silver-white and soft. It is used in atomic clocks, laser cooling and spectroscopy, as its electrons can be easily excited. Rubidium oxidises quickly in air and reacts violently with water.