1. SIAM M. Despeisse / 29 th January 2008 - 1 - - Toward a Gigatracker Front-end - Performance of the NINO LCO and HCO Matthieu Despeisse F. Osmic, S. Tiuraniemi, P. Jarron, P. Riedler

2. SIAM M. Despeisse / 29 th January 2008 - 2 - OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

3. SIAM M. Despeisse / 29 th January 2008 - 3 - The 130 nm NINO test-ASIC Integrated electronics : - LCO, 3 channels - HCO NINO_v13: 1.4 mm × 1 mm

4. SIAM M. Despeisse / 29 th January 2008 - 4 - NINO LCO calibration Expected LCO timing precision for hybrid detector - LCO optimized for 200 fF input capacitance (Higher Cin degrades jitter + minimum threshold) corresponds to the expected performance in a hybrid pixel configuration of LCO estimates what to expect from external measurements on this chip Laser Measurements on Silicon sensor pixel Calibration via a 100 fF injection capacitance IN CHIP Calibration via a 1 pF injection capacitance OUTSIDE CHIP

5. SIAM M. Despeisse / 29 th January 2008 - 5 - NINO LCO calibration Threshold @ 1.5 fC 1 ns CALIBRATION w/ 100 fF injection capacitance

6. SIAM M. Despeisse / 29 th January 2008 - 6 - NINO LCO calibration Expected LCO global timing precision CALIBRATION w/ 100 fF injection capacitance

7. SIAM M. Despeisse / 29 th January 2008 - 7 - NINO LCO calibration 1 ns CALIBRATION w/ 1 pF injection capacitance External TESTS

8. SIAM M. Despeisse / 29 th January 2008 - 8 - NINO LCO calibration Strong degradation of measured jitter compared to the 100 fF tests CALIBRATION w/ 1 pF injection capacitance External TESTS

9. SIAM M. Despeisse / 29 th January 2008 - 9 - NINO LCO calibration - Conclusion Expected LCO global timing precision in the Gigatracker application ? - LCO designed for 200 fF input capacitance - Higher Cin degrades jitter + minimum threshold Laser Measurements on Silicon sensor pixel CALIBRATION w/ 1 pF injection capacitance External TESTS CALIBRATION w/ 100 fF injection capacitance Simulations Data analysis

10. SIAM M. Despeisse / 29 th January 2008 - 10 - OUTLINE Laser Measurements : Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

11. SIAM M. Despeisse / 29 th January 2008 - 11 - Test set-up – Fadmar, Sakari Silicon detector: 300 µm × 300 µm pixel, 200 µm thick sensor Wire bond connection to a LCO channel 1060 nm pulsed Laser tests Laser calibration – position done / Fadmar, Sakari 1 ns

12. SIAM M. Despeisse / 29 th January 2008 - 12 - Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation For a simultaneous generation of e - /h + pairs equally distributed in the sensor thickness (MIP) Ideal shape

13. SIAM M. Despeisse / 29 th January 2008 - 13 - Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation Taking into account the laser pulse shape

14. SIAM M. Despeisse / 29 th January 2008 - 14 - Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation Taking into account the laser pulse shape

15. SIAM M. Despeisse / 29 th January 2008 - 15 - measurements Simulations w. calculated signals Tests results 1 ns Calculated signals + 1.2 pF total Cin give good fitting

16. SIAM M. Despeisse / 29 th January 2008 - 16 - measurements Simulations w. calculated signals Simulations w. calculated signals measurements Calculated signals + 1.2 pF total Cin give good fitting NINO LCO SIMULATIONS w. calculated signals Precise Jitter estimation from simulations

17. SIAM M. Despeisse / 29 th January 2008 - 17 - measurements sim. 1.2 pF sim. 0.7 pF sim. 0.3 pF sim. 1.2 pF sim. 0.7 pF sim. 0.3 pF CAPACITANCE INFLUENCE NINO LCO SIMULATIONS w. calculated signals

18. SIAM M. Despeisse / 29 th January 2008 - 18 - CAPACITANCE INFLUENCE Points simulated w. similar input signals Reducing the capa. reduces the pulse width and so the time walk variations NINO LCO SIMULATIONS w. calculated signals 1 ns

19. SIAM M. Despeisse / 29 th January 2008 - 19 - What we expect w. Ideal shape signals NINO LCO SIMULATIONS w. calculated signals Measurements w. 100 fF injection Jitter estimation for the LCO connected via bump bonding to the sensor: 1.5 fC

20. SIAM M. Despeisse / 29 th January 2008 - 20 - OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

21. SIAM M. Despeisse / 29 th January 2008 - 21 - NINO LCO SIMULATIONS w. pre-amp Use of additionnal pre-amp for the Gigatracker pixel front end Ideal currents LCO inputs LCO outputs 1, 2, 3 fC Pre-amp Under optimization

22. SIAM M. Despeisse / 29 th January 2008 - 22 - NINO LCO SIMULATIONS w. calculated signals Jitter performance (simulations) Th @ 1 fC Th @ 0.7 fC Th @ 0.5 fC Jitter < 150 ps for charges >= 0.8 fC Pre-amp Under optimization

23. SIAM M. Despeisse / 29 th January 2008 - 23 - OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

24. SIAM M. Despeisse / 29 th January 2008 - 24 - NINO HCO HCO circuit optimized for few pF input capacitance Tests via a 1 pF capacitance OUTSIDE CHIP, for a Rin ~ 75 Ω – Power ~ 4.5 mW / channel Minimum charge @ 6 fC Minimum charge @ 10 fC Minimum charge @ 12.5 fC

25. SIAM M. Despeisse / 29 th January 2008 - 25 - NINO HCO HCO circuit optimized for few pF input capacitance Tests via a 1 pF capacitance OUTSIDE CHIP, for a Rin ~ 75 Ω – Power ~ 4.5 mW / channel NB: Simulation technique for the jitter shows good results on HCO too.

26. SIAM M. Despeisse / 29 th January 2008 - 26 - CONCLUSIONS NINO LCO measurements - simulations Showed that we can reach for a hybrid detector : -min. detectable charge of 1.5 fC @ 200 ps rms - jitter 2 fC Pre-amp + LCO - simulations Showed that we can reach for a hybrid detector : - min. detectable charge of 0.5 fC @ 250 ps rms - jitter 0.8 fC HCO possible candidate for end of column receiver Measurements and simulations show < 20 ps rms jitter for fast input signals w. charges > 10 fC