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Injection with roll angle error in the kickers

In this scenario, we want to test the tolerance of the injection system to roll errors in the injection kickers. To simulate an extreme case, we have assumed a large (unrealistic) value for the rms roll angle of 50 mrad. The correction system is not used in this case.

The results of the simulation are show in figures 12 to 17. As we can see, the lattice is very tolerant to the disturbance. The only important effect, as expected, is in the vertical orbit of the injected beam. However, as the expected rms error in the real machine is much smaller (around 5 mrad), it would not compromise the operation of the machine.


  
Figure 12: Bumped orbit for the lattice with roll errors in the kickers.
\begin{figure} \begin{center} \mbox{\epsfig{figure=r_bump.eps, width=.95\textwidth} } \end{center}\end{figure}


  
Figure 13: Horizontal orbit of the injected particle for the firsts 5 turns for the lattice with roll errors in the kickers.
\begin{figure} \begin{center} \mbox{\epsfig{figure=r_injected.eps, width=.95\textwidth} } \end{center}\end{figure}


  
Figure 14: Vertical orbit of the injected particle for the firsts 5 turns for the lattice with roll errors in the kickers.
\begin{figure} \begin{center} \mbox{\epsfig{figure=r_injected_y.eps, width=.95\textwidth} } \end{center}\end{figure}


  
Figure 15: Evolution of the injected beam ellipse at the exit of the septum, for the lattice with roll error in the kickers.
\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=r_ellipse.eps, width=.95\textwidth} } \end{center}\end{figure}


  
Figure 16: Evolution of the injected beam in the horizontal phase space for a damping time, for the lattice with roll errors in the kickers.
\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=r_phase.eps, width=.95\textwidth} } \end{center}\end{figure}


  
Figure 17: Evolution of the injected beam in the vertical phase space for a damping time, for the lattice with roll errors in the kickers.
\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=r_phase_y.eps, width=.95\textwidth} } \end{center}\end{figure}

next up previous
Next: Injection in a realistic Up: Simulation of the injection Previous: Injection in a lattice
Marc Munoz
1999-10-13