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Muon Trigger Upgrade at PHENIX

Muon Trigger Upgrade at PHENIX. RIKEN/RBRC Itaru Nakagawa. Summary. Polarized sea quark measurement via W is very Sexy program for RHIC Spin and should take maximum advantage of it However existing PHENIX Muon Arms Cannot Handle High Rates at sqrt(s )=500 GeV Need Trigger Upgrade!

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Muon Trigger Upgrade at PHENIX

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  1. Muon Trigger Upgrade at PHENIX RIKEN/RBRC Itaru Nakagawa WWND @ Jamaica

  2. Summary • Polarized sea quark measurement via W is very Sexy program for RHIC Spin and should take maximum advantage of it • However existing PHENIX Muon Arms Cannot Handle High Rates at sqrt(s)=500 GeV • Need Trigger Upgrade! • New Triggers have been developed and are under commissioning now We are getting very close to be ready for W production Run!!

  3.  s=500 GeV @ RHIC (LO) Parity Violation Asymmetry Clean flavor separation w/o fragmentation uncertainty

  4. Projected Sensitivity @ PHENIX • Full Detector Simulation • S/B ~ 3/1 Assumed • 300 pb-1 and 1300 pb-1

  5. Current Muon System Muon Tracking Chambers 3 stations of Cathode strip chambers Each station has multiple planes for redundancy Slow read out -> No trigger Muon Identifier 5 layers of Iarocci tubes in x and y 80 cm of steel plate absorber (total) Provides trigger p > 2 GeV B   MuID MuTr St#1 St#2 St#3 Same configuration in South 5

  6. High Momentum Muon Trigger New Trigger Upgrade Run11 500 GeV Projection σtot=60mb L=1.5x1032cm-2s-1 Rate 9 MHz BBCMuID Rejection Power RP~100 Trigger Upgrade RP ~ 45 90 kHz W RPtot ~ 4500 2 kHz PHENIX Band Width for Muon Required Rejection Power MuID Trigger High Rejection Power High Efficiency

  7. PHENIX Muon Trigger Upgrade • 2 dedicated trigger Resistive Plate Chambers (RPC) stations (CMS design): • ~ 1 degree pitch in j NSF (Funded) • MuTr front end electronics • (MuTr-FEE Trigger) JSPS (Funded) RPC3 RPC1 r=3.40m MuTr

  8. B W Trigger System Trigger events with straight track (e.g. Dstrip <= 1) ~10s Trigger MuTr FEE Interaction Region Rack Room

  9. B W Trigger System Trigger events with straight track (e.g. Dstrip <= 1) MuTRG Data Merge Amp/Discri. Transmit Trigger 5% Optical MuTRG MRG MuTRG ADTX 1.2Gbps Trigger 2 planes MuTr FEE 95% Interaction Region Rack Room

  10. Resistive Plate Counter (RPC) (Φ segmented) B W Trigger System Trigger events with straight track (e.g. Dstrip <= 1) RPC FEE MuTRG Data Merge Amp/Discri. Transmit Trigger 5% Optical MuTRG MRG MuTRG ADTX 1.2Gbps Trigger 2 planes RPC / MuTRG data are also recorded on disk. MuTr FEE 95% Interaction Region Rack Room

  11. Resistive Plate Counter (RPC) (Φ segmented) B W Trigger System Trigger events with straight track (e.g. Dstrip <= 1) Level 1 Trigger Board Trigger RPC FEE MuTRG Data Merge Amp/Discri. Transmit Trigger 5% Optical MuTRG MRG MuTRG ADTX 1.2Gbps Trigger 2 planes RPC / MuTRG data are also recorded on disk. MuTr FEE 95% Interaction Region Rack Room

  12. Resistive Plate Counter (RPC) (Φ segmented) B W Trigger System Trigger events with straight track (e.g. Dstrip <= 1) Level 1 Trigger Board Trigger RPC FEE MuTRG Data Merge Amp/Discri. Transmit Trigger 5% Optical MuTRG MRG MuTRG ADTX 1.2Gbps Trigger 2 planes RPC / MuTRG data are also recorded on disk. MuTr FEE 95% Interaction Region Rack Room

  13. Resistive Plate Counter (RPC) (Φ segmented) B W Trigger System (Final) Trigger events with straight track (e.g. Dstrip <= 1) Level 1 Trigger Board RPC FEE DCM DCM MuTRG Data Merge Amp/Discri. Transmit Trigger 5% Optical MuTRG MRG DCM MuTRG ADTX 1.2Gbps Trigger 2 planes RPC / MuTRG data are also recorded on disk. MuTr FEE 95% Interaction Region Rack Room

  14. Prototype RPC MuTRG MuTRG W Trigger Instrumentationin RHIC 2009 run absorber • Full Installation to North Arm, 1/2 octant installed to South • Demonstrate performance of RPC and MuTRG with beam of s=500 GeV.

  15. New MuTRIG-FEE in North Arm  Before Install 2008 Install

  16. MuTR-FEE Trigger Performance

  17. MuTrig 0.05Q MuTr Q 0.95Q MIP

  18. B Track Efficiency = (hit efficiency/station ~ 96%)3 x (vertex cut efficiency)

  19. MuTRG System Run09 performance • MuID Algorithm • Track Matching w/ MuID • Timing cut w/ RPC • Track Matching w/ RPC • Background Shields • etc ..  20

  20. RPC

  21. RPC RPC1 RPC3 South RPC3 North RPC3 • Fast response • Good intrinsic time resolution • Good spatial resolution: typically ~ cm • Low cost RPC1

  22. RPC Construction People Half octant testing Pre-Assembly Storage NPL: RPC-3 Pre-Assembly

  23. RPC Performance w/ Cosmic Cosmic Ray test with stack of 5 detector modules

  24. Prototype RPC Performance @ Run9 RPC3 RPC2 μ beam BG track reconstructed events Demonstrated Satisfactory Timing Resolution w/ beam! sigma~4.1ns sigma~5.3ns

  25. Prototype RPC MuTRG MuTRG Road Map to Run11 Production Run absorber Run9

  26. MuTRG Road Map to Run11 Production Run RPC3 MuTRG Run10

  27. Installation to South Muon Arm • Post Run9 Shutdown • Completed! • Under Commissioning in Run10 Au-Au Run

  28. RPC3 North Installation (Nov.’09)

  29. RPC3 North Completed Installation

  30. MuTRG Road Map to Run11 Production Run RPC3 RPC3 absorber MuTRG Run11

  31. MuTRG Final Muon Trigger Configuration RPC3 RPC3 absorber MuTRG RPC1 Run12

  32. Summary • Seak Quark Polarization Measurement @ PHENIX via W-Boson • High Momentum MuTR-FEE Trigger is Competed Installation and to be Commissioned in Run10 • Both MuTr-FEE Trigger and RPC Commissioning Demonstrated Designed Performances. • More rejection power are expected from • RPC (Timing & Matching) • MuID Algorithm • Background Shields PHENIX Muon Arms are getting ready for pp Production at 500 GeV in Run11

  33. Backup Slides

  34. LL1 Trigger Readiness LL1 Board • Communication test  • LL1 Boards Production Completed • On going ADTX - MRG - LL1 - GL1 chain test now. • New high momentum trigger will be operated in Run10 for commissioning MuTRG-MRG Boards

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