CMS Upgrade Workshop November 19-21 Fermilab POWER DISTRIBUTION SYSTEM STUDIES

1. CMS Upgrade Workshop November 19-21 Fermilab POWER DISTRIBUTION SYSTEM STUDIES FOR THE CMS TRACKER Fermilab,University of Iowa and University of Mississippi Marcos Turqueti (turqueti@fnal.gov)

2. Outline • Report on the ongoing work at ESE/CD on Power Distribution for the CMS Tracker. • Discuss possible improvements on the ongoing work. • Summarize the objectives of ESE/CD on Power Distribution for the CMS Tracker. • Discuss the current options available for the Upgrades.

3. What are the activities being carried out at ESE right now? • DC-DC power distribution tests using the PSI46. • Data over power utilizing the PSI46 readout chip as target. • Simulation tools development for the CMS tracker power design.

4. DC-DC Power Distribution Tests • Tests performed in using the CMS pixel readout chip, the test can be scaled from one to hundreds of ROCs. • Compare performance comparison between the current power scheme and the DC-DC system using different parameters. • Key performance parameters that will be checked; power line noise, communications integrity and ROC performance. • Key DC-DC parameters that will be studied are: DC voltage level and data over power with different cable lengths. • Key hardware pieces that will be tested; switching voltage regulators with different PCB embedded inductors, switching capacitor regulators, data-over power encoding circuit and PSI46 regulation circuit.

5. DC-DC Setup 1) CURRENT CMS LOW VOLTAGE DISTRIBUTION SYSTEM PSI46 ANALOG OUT 20 xPSI46 ROCs Gigabit Ethernet Personal Computer with CMS Power distribution Software PSI46 CONTROL PSI46 CARD CAPTAN DAQ System 2) PROPOSED DC-DC DISTRIBUTION SYSTEM ENCODED PSI46 DATA (TDMA)+POWER TDMA ENCODER + DC-DC CONVERSION

6. Test Setup at FNAL Gigabit Ethernet CAPTAN DAQ System PSI46 ANALOG OUT 20 xPSI46 ROCs PSI46 Control signals System currently available.

7. 3) EXPANDED DC-DC DISTRIBUTION TEST SYSTEM X 24 CAPTAN NODE 6 CARDS ONE CAPTAN NODE WITH 6 DCB CARDS CAN SUPPORT 24 BOARDS, THIS TRANSLATES TO 480 ROCS PER NODE

8. The DC-DC/encoder board EMBEDDED INDUCTORS MICRO CARDS ADC TO PSI46 ROCs BOARD- ANALOG (SATA) TO CAPTAN CONNECTOR (SATA) TO PSI46 ROCs BOARD- DIGITAL JTAG DC-DC STEP-DOWN BOARD A3P250 FPGA LINEAR REGULATORS INDUCTOR BASED SWITCH STEP-DOWN REGULATORS OR EMBEDDED INDUCTORS MICRO CARDS CAPACITOR SWITCH STEP-DOWN REGULATORS

9. V TDMA -180MHZ LVDS (1.25) 1 0 TKOUT ADC_SAMPLE V TDMA - 180MHZ LVDS (20.0) 1 1 0 0 0 0 0 20V t I2c+reset TK TRG How It Works FPGA ADC, 105 Mbps SWITCHED REG BOARD ◄ AOUT → Ck ± → Tki ± ← Tko± → Tr ± → I2C ± → R 3.5 2.5V 2.5V 1.8V PSI ROC MODULE Will be available in three weeks.

10. PINGA Software for CAPTAN Noise and Threshold Dispersion

11. SIMULATION • What are the Costs of a Given Design? • Material Budget • Power Dissipation/Efficiency • Reliability • Detector Performance Degradation • How Does the System Evolve? • Failure Modes • Coupling Effects • Probabilities of Failures Change • Power and Performance Change

12. SIMULATION • Possible Simulation Approach: • Select a Power Distribution Design • Implement the Corresponding Model • Formulate a Cost Function • Integrate the System in Time to Get a Sample Sequence • Update the Cost Function in Time • Compute Average Cost for the Design • We are now gathering info on the current system, in particular the observed failure modes, its impact and frequency on the detector performance.

13. Next Steps • Complete Current Test System Development. • Implement same Test System for Serial Powering Concept with PSI46 Modules. One possible implementation is using the Serial Power Interface Chip, see Marcel Trimpl presentation. • Simulation Software Development.