Geometry

TOFR=212cm

BEMCR=225cm

Δη=0.1

ΔΦ=0.1

BEMC: 40*120 (eta*phi) towers1 Tower: 0.05*0.05 (eta*phi) 12cm*12cm

TOF: 2*60 (eta*phi) trays1 tray=32 MRPC modules1 module=6 cells1 cell: 6cm*3cm

• 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)