Abstract A HIGH-POWER TARGET EXPERIMENT

We describe an experiment designed as a proof-ofprinciple test for a target system capable of converting a 4-MW proton beam into a high-intensity muon beam suitable for incorporation into either a neutrino factory complex or a muon collider. The target system is based on exposing a free mercury jet to an intense proton beam in the presence of a high-strength solenoidal magnetic field. THE TARGET CONCEPT Key elements of the target system [1] are: an intense proton source, copious soft-pion production off a high-� target that is replaced every beam pulse, and capture of the generated low-È � pions in a high-field ( � 15 T) solenoidal magnet, as shown in Fig. 1. An important byproduct of this approach is that � ’s and � ’s are equally produced and both particle types can be conducted down the solenoidal decay channel. Figure 1: Concept of a continuous mercury jet target for an intense proton beam. The jet and beam are tilted by 100 mrad and 67 mrad, respectively, with respect to a 20-T solenoid magnet that conducts low-momentum pions into a decay channel