The PHENIX Muon Trigger Upgrade

Details The PHENIX Muon Trigger Upgrade The PHENIX Muon Trigger Upgrade

2006-12-01

arxiv.org/abs/physics/0612018v1

AIPConf.Proc.915:490-493,2007

Physics

Instrumentation and Detectors

4 pages, 4 figures; contribution to proceedings of Spin 2006

Scientific paper

10.1063/1.2750827

The PHENIX muon trigger upgrade adds Level-1 trigger detectors to existing forward muon spectrometers and will enhance the ability of the experiment to pursue a rich program of spin physics in polarized proton collisions at sqrt(s)=500GeV. The additional muon trigger detectors and Level-1 trigger electronics will allow the experiment to select high momentum muons from the decay of W-bosons and reject both beam-associated and low-momentum collision background, enabling the study of quark and antiquark polarization in the proton. The muon trigger upgrade will add momentum and timing information to the present muon Level-1 trigger, which only makes use of tracking in the PHENIX muon identifier (MuID) panels. Signals from three new resistive plate chambers (RPC's) and re-instrumented planes in the existing muon tracking (MuTr) chambers will provide momentum and timing information for the new Level-1 trigger. An RPC timing resolution of ~2ns will permit rejection of beam related backgrounds.

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