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Injection in a realistic case

The last scenario to consider is a realistic one, were we include the following elements:

Effect of the errors and the correction system in the lattice (the same that the ones considered in section 5.
A realistic roll angle error in the kickers, with a rms value of 5 mrad.
Error in the injected beam, with an average 10% offset respect the ideal case.

Again, figures 18 to 23 shows the result of the simulation. The beam is still safely injected in the machine. The main difference in this case is a large betatron oscillation in the vertical plane, due to the off-axis injection, but the particles remain inside the vacuum chamber.

**Figure 18:** Bumped orbit for the realistic case.
$\begin{figure} \begin{center} \mbox{\epsfig{figure=s_bump.eps, width=.95\textwidth} } \end{center}\end{figure}$

**Figure 19:** Horizontal orbit of the injected particle for the firsts 5 turns for the realistic case.
$\begin{figure} \begin{center} \mbox{\epsfig{figure=s_injected.eps, width=.95\textwidth} } \end{center}\end{figure}$

**Figure 20:** Vertical orbit of the injected particle for the firsts 5 turns for the realistic case.
$\begin{figure} \begin{center} \mbox{\epsfig{figure=s_injected_y.eps, width=.95\textwidth} } \end{center}\end{figure}$

**Figure 21:** Evolution of the injected beam ellipse at the exit of the septum, for the realistic case.
$\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=s_ellipse.eps, width=.95\textwidth} } \end{center}\end{figure}$

**Figure 22:** Evolution of the injected beam in the horizontal phase space for a damping time, for the realistic case.
$\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=s_phase.eps, width=.95\textwidth} } \end{center}\end{figure}$

**Figure 23:** Evolution of the injected beam in the vertical phase space for a damping time, for the realistic case.
$\begin{figure} \begin{center} \leavevmode \mbox{\epsfig{figure=s_phase_y.eps, width=.95\textwidth} } \end{center}\end{figure}$

Next: Evaluation of the acceptance Up: Simulation of the injection Previous: Injection with roll angle

Marc Munoz
1999-10-13