Nuclear magnetic resonance (NMR) probe head has sliding bush that exerts decelerating friction at piston actuating rod for linear displacement of capacitor piston while steep flanks in sawtooth shape via piston actuating rod

摘要

The probe head has cavity (15) that is connected to piezoelectric actuator (12) to which sawtooth shaped electric voltage is applied. A capacitor piston (7) is arranged within the cavity. The piezoelectric actuator is arranged in extension direction of piston axis (A). A slide bush (9) is provided with bore hole (16) via which piston actuating rod (8) is connected to piezoelectric actuator. The sliding bush exerts decelerating friction at piston actuating rod for linear displacement of capacitor piston while steep flanks in sawtooth shape via piston actuating rod.