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Geometry

Geometry. TOF R=212cm. BEMC: 40*120 (eta*phi) towers 1 Tower: 0.05*0.05 (eta*phi) 12cm*12cm. BEMC R=225cm. Δη =0.1. TOF: 2*60 (eta*phi) trays 1 tray=32 MRPC modules 1 module=6 cells 1 cell: 6cm*3cm. ΔΦ =0.1. Some issues

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Geometry

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  1. Geometry TOF R=212cm BEMC: 40*120 (eta*phi) towers 1 Tower: 0.05*0.05 (eta*phi) 12cm*12cm BEMC R=225cm Δη=0.1 TOF: 2*60 (eta*phi) trays 1 tray=32 MRPC modules 1 module=6 cells 1 cell: 6cm*3cm ΔΦ=0.1

  2. Some issues • TOF efficiency & acceptance ( (0.85*0.95*0.9)2=0.5 !! ) • Gaps between TOF trays (lose 10%-20% acceptance) • TOF efficiency for pT~5 GeV/c e is >90% • TOF May have dead/hot area during the Run • Mismatch between tower & cells • Cross-talk within 1 MRPC module • Large vertex Z • Preliminary results indicate the rejection factor is ~6 for L2 upsilon trigger in Run9 p+p 200 GeV • Need full simulations in Au+Au 200 GeV • L0+L2 frame work coding and baby sitting during the Run • BEMC • BEMC pre-calibration • Hot tower dynamic masking • TOF • Decoding • Hot cell/module dynamic masking • Online documentation and display • Need input from the TOF experts (firmware)

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