Left Arm: Slot 10, Ch. 8 - HAPPEX Det 1 Slot 10, Ch. 9 - HAPPEX Det 2 (not installed) Slot 10, Ch. 10 - Scintillator Scanner (counting mode) Slot 10, Ch. 11 - Quartz Scanner (integrating mode) Slot 2, Ch. 10 - S0-A Slot 2, Ch. 11 - S0-BHAPPEX S0s have not been commissioned in beam. Cosmics HV setting has been around -1300V to -1400.Right Arm (Top Crate): Slot 11, Ch. 10 - HAPPEX Det 3 Slot 11, Ch. 11 - HAPPEX Det 4 (not installed) Slot 10, Ch. 10 - Scintillator Scanner Slot 10, Ch. 11 - Quartz Scanner Slot 14, Ch. 10 - S0-A Slot 14, Ch. 11 - S0-B