Target System The process of creating the muon beam begins with the bombardment of a pion-production target with a 4 MW, pulsed proton beam. The target must be sufficiently heavy to produce pions copiously, yet not so large as to cause a significant rate of ineraction of the secondary pions within the target material. In addition, the target must withstand the substantial beam- induced shock. The IDS-NF baseline calls for a free-flowing, liquid-mercury jet target operating in a solenoid-focusing, pion-capture channel. This is follewed by a solenoidal transport channel in which the pions decay to muons.