Sixty Years of Quantized Circulation

Vinen's vibrating wire experiment detected quantized vortices in superfluid 4He, with the anticipated circulation quantum h/m. In addition to this main result, Vinen used his data propose other properties and behaviors of vortices, which are revisited here. Subsequent work confirmed that non-quantized values occur when cover only part wire's length, size covered section can change easily. Any motion detached portion vortex induces changes around wire, provides a means tracking free vortex. Particularly distinctive signatures correspond circular through cell Kelvin waves along Another issue, lack stability multi-quantum states, also be explained simple arguments, possibility partially again plays key role. Vibrating measurements descended from continue probe flow.