CALORIMETER SECTOR NUMBERING SYSTEM TO CALORIMETER TRIGGER PHI INDEX COORDINATE -------------------------------------------------- FIRST DRAFT 22-MAR-1990 For the North half of the For the South half of the Calorimeters i.e. negative eta's Calorimeters i.e. positive eta's -------------------------------- -------------------------------- CALORIMETER CALORIMETER CALORIMETER TRIGGER CALORIMETER TRIGGER SECTOR PHI INDEX SECTOR PHI INDEX ----------- ----------- ----------- ----------- UP TOP UP TOP S0 9 S0 8 S1 10 S1 7 S2 11 S2 6 S3 12 S3 5 S4 13 S4 4 S5 14 S5 3 S6 15 S6 2 S7 16 S7 1 WEST HORZ. EAST HORZ. S8 17 S8 32 S9 18 S9 31 S10 19 S10 30 S11 20 S11 29 S12 21 S12 28 S13 22 S13 27 S14 23 S14 26 S15 24 S15 25 DOWN BOTTOM DOWN BOTTOM S16 25 S16 24 S17 26 S17 23 S18 27 S18 22 S19 28 S19 21 S20 29 S20 20 S21 30 S21 19 S22 31 S22 18 S23 32 S23 17 EAST HORZ. WEST HORZ. S24 1 S24 16 S25 2 S25 15 S26 3 S26 14 S27 4 S27 13 S28 5 S28 12 S29 6 S29 11 S30 7 S30 10 S31 8 S31 9 UP TOP UP TOP