1. Outer Tracker Electronics ASD TDC L0 Buffer L1 Buffer biasL0 BXL1 50 fC DAQ chambercounting room ~100m Ulrich Uwer University of Heidelberg LHCb Electronics Workshop CERN, 05/02/2003

2. ASDBLR OTIS GOL ASDBLR OTIS HV board ASDBLR LV Reg L1 TFC ECS LVHV Module End: 128 channels 16 ASDBLR chips 4 OTIS TDC chips 1 optical link: 1.28 Gbit/s Outer Tracker: T1…3 56000 channels 432 optical links tot. dose < 10krad 9 modules

3. X 1 X 2 X 4 X 8 GOL/Aux Board TDC boards HV boards ASD boards boardsnumber GOL/Aux 432 TDC1732 ASD3456 HV1728 Front-end boards: OTIS TDC chip A.Berkien H.Deppe U.Stange

4. Services: TFC: TTCrx + Rst Decoder → LVDS Signals → modules ECS: SPECS Slave → I2C bus lines → modules → JTAG → ADCs → LV sensing Low Voltage: passive +/- 5V distribution → modules High Voltage: passive distribution → 2 connections/modules Service Box 1 service box / 2-stereo-layer quadrant: → 4 x 2 x 3 = 24 Service Boxes T.Sluijk, A.Zwart

5. ECS: Expected Data Volume I2C:OTIS Initialization 8 Byte/OTISat start-up 32 Byte/module 576 Byte/service-box GOL Initialization 4 Byte/GOLat start-up 72 Byte/service-box JTAG:LV/Tmp readout 4 (20) Byte/ADC~1/min (start) 18 ALICE ADCs 72 (360) Byte/service-box

6. From OTIS to L1 Buffer 1.28 (1.6) Gbits/s Trigger GOL Module OTIS 32 bits optical link GOL Module OTIS 32 bits GOL Module OTIS 32 bits 1 2 3 4 5 6 7 8 9 10 11 12 DAQ L1 Buffer PreProc for L1 Trig L1 Buffering and zero suppression <15 MB/s Total data volume: 432 opt links → 36 L1 boards total data flow at 40 KHz: 380 MB/s <100 MB/s

7. Test bench for optical link TI TLK2501 evaluation boardGOL Test board: GOL + VCSEL GOL STRATOS optical transceiver VCSEL Error rate < 10 -13 A.Rausch, D.Wiedner

8. Common project Velo, IT, OT Outer Tracker L1 Buffer Board: G.Haefeli et al.

9. OT Receiver: O-RxCard A.Rausch, D.Wiedner

10. PP FPGA Sync FPGA Occup.Data/event 2% (av.)155 bit 4% (max)278 bit Hit mask416 bit 3 GOL = 12 OTIS = 384 Ch L1T fragment link: @1.1MHz Occup.Data/linktot evnt 0%204 Byte7.3 kByte 2% (av.)266 Byte9.6 kByte 4 %(max)328 Byte11.8 kByte DAQ Link: 10.6 MByte/s @ 40kHz (2%) L1T Link: 680 Mbit/s @ 1.1MHz (2%) L1T/DAQ Data size: x 36

11. Outer Tracker Electronics: Time Schedule 200420052003 07/03 Validation of OTIS baseline 10/03 Delivery of OTIS1.1 06/04 Pre-series finished: start mounting 01/05 Delivery of OTIS1.2 03/05 Start Mass Prod 03/04 Start pre-series production