1. Brookhaven Science Associates U.S. Department of Energy 1 LECC2005 Advanced Front End Signal Processing Electronics for ATLAS CSC System: Status and post production performance Sachin Shrirang Junnarkar, Paul O’Connor, Anand Kandasamy Brookhaven National Laboratory 11th Workshop on Electronics for LHC and future Experiments 12- 16 September 2005, Heidelberg, Germany Plenary Session B5

2. Brookhaven Science Associates U.S. Department of Energy 2 LECC2005 OverviewOverview 1. Introduction to Cathode Strip Chambers (CSCs) 2. Amplifier shaper modules’ (ASM) pack 3. Production test setup for ASMpack 4. Production test results 5. Conclusion

3. Brookhaven Science Associates U.S. Department of Energy 3 LECC2005 Introduction to CSCs

4. Brookhaven Science Associates U.S. Department of Energy 4 LECC2005 Front end electronics facts n 2 ASM-I and 1 ASM- II make one pack n 5 ASM packs per chamber 4 x-strip (2 per side) 1 y-strip n 160 packs for the system (128 x-strip, 32 y-strip) n 192 Channels per pack (30720 total channels) HAMAC/Muon SCAs ASM-II AD9042AST ASM2MUX HDMP1022 and HDMP1024 Optical Transceivers SDX-19-4-1-S Preamp/Shaper ASIC ASM-I

5. Brookhaven Science Associates U.S. Department of Energy 5 LECC2005 Signal Flow on CSC ASM-IIASM-ICSC

6. Brookhaven Science Associates U.S. Department of Energy 6 LECC2005 Production Test Setup

7. Brookhaven Science Associates U.S. Department of Energy 7 LECC2005 Labview Interface

8. Brookhaven Science Associates U.S. Department of Energy 8 LECC2005 Linearity

9. Brookhaven Science Associates U.S. Department of Energy 9 LECC2005 RMS Noise Distribution For 96 Channels

10. Brookhaven Science Associates U.S. Department of Energy 10 LECC2005 Representative Pedestal Distribution

11. Brookhaven Science Associates U.S. Department of Energy 11 LECC2005 RMS Noise in ADC count vs. Strip #

12. Brookhaven Science Associates U.S. Department of Energy 12 LECC2005 Mean of Maximum Amplitude ADC Count Distribution for 96 Channels

13. Brookhaven Science Associates U.S. Department of Energy 13 LECC2005 Reconstructed Track

14. Brookhaven Science Associates U.S. Department of Energy 14 LECC2005 ConclusionConclusion n Production for the front end electronics for the ATLAS CSC is complete n Testing of ASM-Packs is 91% complete n Chamber assembly is underway n We hope to ship assembled CSCs along with the front end electronics to CERN by the end of this month

15. Brookhaven Science Associates U.S. Department of Energy 15 LECC2005 Acknowledgements Vinnie Polychronakos Valeri Tcherniatine Vadim Gratchev Alexander Khodinov Sri Harsha Marmaraju Jack Fried Kim Ackley Ronald Ryan John Triolo Kevin Wolniewicz Ron Angona Howard Hansen

16. Brookhaven Science Associates U.S. Department of Energy 16 LECC2005

17. Brookhaven Science Associates U.S. Department of Energy 17 LECC2005 Radiation qualified COTs on ASM packs

18. Brookhaven Science Associates U.S. Department of Energy 18 LECC2005 ASICs on ASM Packs

19. Brookhaven Science Associates U.S. Department of Energy 19 LECC2005 CSC Environment

20. Brookhaven Science Associates U.S. Department of Energy 20 LECC2005 ASM-Pack: Front end electronics requirements

21. Brookhaven Science Associates U.S. Department of Energy 21 LECC2005 ASM-I: Preamplifier Shaper ASIC specifications

22. Brookhaven Science Associates U.S. Department of Energy 22 LECC2005 Power Distribution on ASMPack

23. Brookhaven Science Associates U.S. Department of Energy 23 LECC2005 Cooling of ASM pack

24. Brookhaven Science Associates U.S. Department of Energy 24 LECC2005 ADC Counts and fc relations n Preamp gain = 3.8mV/fc n 1700mV=2048 ADC counts n 0.83mV=1 ADC Count at the preamp n Noise in ADC Count = 2.5RMS n Noise in mV= 2.158mV n Noise in fC = 0.56fC = 3549 e-