  We analyze a superconductor-ferromagnet (S/F) system with a spiral magnetic
structure in the ferromagnet F for a weak and strong exchange field. The
long-range triplet component (LRTC) penetrating into the ferromagnet over a
long distance is calculated for both cases. In the dirty limit (or weak
ferromagnetism) we study the LRTC for conical ferromagnets. Its spatial
dependence undergoes a qualitative change as a function of the cone angle
\theta. At small angles the LRTC decays in the ferromagnet exponentially in a
monotonic way. If the angle \theta exceeds a certain value, the exponential
decay of the LRTC is accompanied by oscillations with a period that depends on
\theta. This oscillatory behaviour leads to a similar dependence of the
Josephson critical current in SFS junctions on the thickness of the F layer. In
the case of a strong ferromagnet the LRTC decays over the length which is
determined by the wave vector of the magnetic spiral and by the exchange field.
