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Find Orbit with Spin

   state=default0+DELTA0+SPIN0
   XS0=x0(1:6)
    CALL FIND_ORBIT_probe_spin(ALS,XS0,STATE,c_1d_5,FIBRE1=1,theta0=theta0)

The triple spinor of $\bgroup\color{black}$XS0\%S(1:3)$\egroup$ is filled with 3 copies of the $\bgroup\color{black}$\vec{n}_0$\egroup$ invariant apin axis on the closed orbit for the user's convenience. The re

N.B. $\vec{n}_0$ should not be confused with the invariant spin field $\vec{n}(x,p_x,y,p_y,\delta_E,t)$ which is a far more complex entity to compute. See Sec. (8.2).

Frank Schmidt 2010-10-15