  Superconducting micro- and nanohelices are proposed for the first time. A
theoretical investigation of the superconducting state in the helical coils at
the micro- and nanoscale is performed within the time-dependent Ginzburg-Landau
approach. The pattern and number of vortices in a stationary distribution are
determined by their confinement to the ultrathin helical spiral and can
therefore be efficiently controlled by the helical stripe width and the helical
pitch distance for both dense and sparse helices. Quasi-degeneracy of vortex
patterns is manifested in the helical spiral when the number of vortices is
incommensurable with the total number of half-turns. With increasing radius,
superconducting helical spirals provide a physical realization of a transition
from the vortex pattern peculiar to an open tube to that of a planar stripe.
