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Performance and Early Results from the Muon Tracking System of

Performance and Early Results from the Muon Tracking System of. Rusty Towell of Abilene Christian University for the PHENIX collaboration First Joint Meeting of the Nuclear Physicists of the American and Japanese Physical Societies. PHENIX at RHIC. Muon Tracking System.

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Performance and Early Results from the Muon Tracking System of

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  1. Performance and Early Results from the Muon Tracking System of Rusty Towell of Abilene Christian University for the PHENIX collaboration First Joint Meeting of the Nuclear Physicists of the American and Japanese Physical Societies

  2. PHENIX at RHIC APS/JPS Meeting Maui, Hawaii

  3. Muon Tracking System Muon Arms Cover: 1.2 < h < 2.2 (South) 1.2 < h < 2.4 (North) almost complete azimuthal coverage Tracking with 3 stations of chambers in magnetic field Each of the station 3 octants are about 9 ft long and 9 ft wide. APS/JPS Meeting Maui, Hawaii

  4. Muon Tracking Parameters • Physics Resolution Required : • Resolve  from  +  ( 80 MeV/c2 or 8 %) • Resolve J/ from ´ ( 110 MeV/c2 or 4 %) • Resolve  from ´ + ´´ ( 200 MeV/c2 or 2 %) • Cathode Strip Chamber characteristics: • Anode wire and cathode strip spacing = 1cm • Detector gap width = 0.6 cm • Three gaps at stations 1 and 2, two gaps at station 3 • Single plane resolution  100 m  chamber  60 m • Over 20,000 channels to readout in the south arm APS/JPS Meeting Maui, Hawaii

  5. Chamber Construction Stations 1 and 3 used etched copper skins for cathode planes. Station 2 chambers were designed to have a total thickness  0.5% radiation lengths. Station 2 used etched copper covered mylar windows for cathode planes to minimize multiple scattering. APS/JPS Meeting Maui, Hawaii

  6. FEE Overview • Inside Magnet/no access • Limited Space • Power constrain • Many Channels • 168 FEMs • over 20,000 channels APS/JPS Meeting Maui, Hawaii

  7. South Muon MagnetStation 1 Chambers and FEE Installed APS/JPS Meeting Maui, Hawaii

  8. South Muon MagnetSide view of chambers and FEE APS/JPS Meeting Maui, Hawaii

  9. PHENIX Detector - Now APS/JPS Meeting Maui, Hawaii

  10. Lots of Physics Melting of the r Deconfinement by J/y suppression Chiral Symmetry Restoration shifting f mass  Thermal Production of Charm Baseline with U p-p Spin Measurements APS/JPS Meeting Maui, Hawaii

  11. J/y Kinematic Coverage 8,000 Simulated J/y’s accepted into the south muon arm xF pT (GeV/c2) APS/JPS Meeting Maui, Hawaii

  12. Expected J/ y Yields J/y (m+m-) Run 1 (2000) 0 Run 2 (2001,2) 3 x 104 Run 3  106 Muon arms were not installed. Assumes 242 b-1 during Au-Au running. Additional data from p-p spin run and follow-up (?) runs. Commissioning of south muon arm and triggers. Assumes a longer run, higher luminosity and commissioning of the north muon arm. APS/JPS Meeting Maui, Hawaii

  13. MuTr Event Display APS/JPS Meeting Maui, Hawaii

  14. Hit Distribution APS/JPS Meeting Maui, Hawaii

  15. Residuals APS/JPS Meeting Maui, Hawaii

  16. Correlation with PHENIX APS/JPS Meeting Maui, Hawaii

  17. Summary • The south arm of the muon tracking system has been installed and is being commissioned. • The north arm will be installed next year. • The data taken by the south arm of PHENIX being taken during this RHIC run, will be the first look at muon physics from RHIC. • The initial indications from these data imply that the system is preforming well. • We are excited about obtaining physics results in the near future. APS/JPS Meeting Maui, Hawaii

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