Simultaneous Multiple Targeting Techniques

During 1968 two new internal targeting modes were successfully tried in the Zero Gradient Synchrotron (ZGS). These modes will substantially increase the utilization of the ZGS by giving beam to several beam lines on the same machine pulse for the entire length of flattop. One of these modes, using two targets 180?? apart, was tried in preparation for utilization of the second extracted proton beam area. Beam intensity could be arbitrarily divided on the two targets for the full 750 msec flattop. Additionally, secondary particles from one of these targets can provide a pion beam into the Meson Area. Measurements of emittance showed no significant change from previous single-target extraction. Another mode utilized beam sharing on two targets located about five feet apart in the magnetic field of the ZGS ring magnet. In this case, an extracted proton beam (EPB) was delivered into the EPB-I area; a neutron beam at 10 production angle and a pion beam were delivered into the Meson Area. It appears possible to combine these two modes and thus be able to provide a 750 msec spill into four different beam lines on each machine pulse.