module spin_test_parameters
 use precision_def
   real(rp) B_long_over_Bz, B_rad_over_Bz, radial_frac
   real(rp), parameter :: length=44.686
   real(rp), parameter :: Radius = 7.112
  real(rp) k_quad !V/m^2
  integer nn ! longitudinal field harmonic
  integer Ncoils, n_azim
  logical maxwell_solenoid
end module spin_test_parameters