1. B.Satyanarayana (For INO collaboration) Department of High Energy Physics Tata Institute of Fundamental Research Homi Bhabha Road, Colaba, Mumbai, 400 005 E-mail: bsn@tifr.res.inbsn@tifr.res.in Design of electronics, trigger and data acquisition system for the proposed INO prototype detector

2. XVI DAE-BRNS Symposium on HEP SINP, Kolkata Nov 29 - Dec 3, 20042 INO prototype detector Detector and signal specifications –Detector dimensions: 1m X 1m X 1m –14 layers of RPCs with 6cm iron plates interleaved. –Two signal planes orthogonal to each other and each having 32 pick-up strips –Total channels = 32 X 14 X 2 = 896 –Pulse height = 100 to 300mV; Rise time = < 1 ns –Pulse width = ~50ns; Rate ~ 1KHz Trigger information –Expected trigger rate is few Hz –Required Trigger logic is m X n fold, where –m = 1 to 4; no. of consecutive channels in a layer –n = 5 to 1; no. of consecutive layers with m fold in each layer –ie m x n = (1 x 5) OR (2 x 4) OR (3 x 3) OR (4 x 2) Information to be recorded on a trigger –Absolute arrival time of the trigger –Track identification (XYZ points in RPC layers) –Direction of track ( TDC information) –Miscellaneous information and calibration data Monitoring health of the detector

3. XVI DAE-BRNS Symposium on HEP SINP, Kolkata Nov 29 - Dec 3, 20043 Readout scheme for prototype

4. XVI DAE-BRNS Symposium on HEP SINP, Kolkata Nov 29 - Dec 3, 20044 32-channel front-end module

5. XVI DAE-BRNS Symposium on HEP SINP, Kolkata Nov 29 - Dec 3, 20045 Prototype detector trigger logic

6. XVI DAE-BRNS Symposium on HEP SINP, Kolkata Nov 29 - Dec 3, 20046 Readout scheme for final detector The keywords are channel count and fast timing