PPT ½½¶óÀ̵å
? 6 walls of steel absorber interleaved with layers of plastic proportional (Iarocci) tubes
? Provides 10-2 of the overall 10-4 ?/? rejection
? Lower energy muon threshold of ~ 2.2 GeV
? Provides level-1 trigger pipelined at 106 ns
The PHENIX Experimental Hall last summer