PARMELA computation for revised gun geometry C.Limborg-Deprey Comparison 4 maps : 2D (omega2P) => no ports 3D (omega3P) => coupling port but original cylindrical cell shape 3D (omega3P) => with racetrack shape in full cell 3D (omega3P) => with laser ports in ½ cell and racetrack shape

No coupling ports With coupling ports Suppression of quadrupole head-tail with the racetrack shape of the full cell

Coefficient on Solenoid Efield Retuning the beamline for the “full” map (= map including racetrack plus laser ports) Varying Egun field Varying Solenoid field Varying RF Coefficient on Solenoid

Maybe room for improvement New tuning x,80% = 0.908 mm.mrad y,80% = 0.915 mm.mrad Maybe room for improvement With RF