Precession phase of the neutron spin after adiabatic passage through a resonant spin flipper

The precession phase shift, produced by resonance coils with adiabatic passage of the neutron spin, is investigated using the rotating frame approach. The precession phase of the neutron spin in the rotating frame has been measured as a function of the main parameters of the spin flipper: the permanent magnetic field B0, the value of the gradient field A′ and the amplitude of the oscillating field A′′.