cms upgrade workshop november 19-21 fermilab power distribution system studies
DESCRIPTION
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 ([email protected]). Outline. Report on the ongoing work at ESE/CD on Power Distribution for the CMS Tracker. - PowerPoint PPT PresentationTRANSCRIPT
CMS Upgrade WorkshopNovember 19-21
Fermilab
POWER DISTRIBUTION SYSTEM STUDIES FOR THE CMS TRACKER
Fermilab,University of Iowa and University of Mississippi
Marcos Turqueti([email protected])
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.
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.
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.
DC-DC Setup
1) CURRENT CMS LOW VOLTAGE DISTRIBUTION SYSTEM
2) PROPOSED DC-DC DISTRIBUTION SYSTEM
Personal Computer with CMS Power
distribution Software
Gigabit Ethernet
CAPTAN DAQ System
PSI46 CARD
PSI46 ANALOG OUT
PSI46 CONTROL
ENCODED PSI46 DATA (TDMA)
+POWER
TDMA ENCODER + DC-DC CONVERSION
20 xPSI46 ROCs
Test Setup at FNAL
20 xPSI46 ROCs
CAPTAN DAQ System
Gigabit Ethernet
PSI46 ANALOG OUT
PSI46 Control signalsSystem currently available.
3) EXPANDED DC-DC DISTRIBUTION TEST SYSTEM
X 24CAPTAN NODE
6 CARDS
ONE CAPTAN NODE WITH 6 DCB CARDS CAN SUPPORT 24 BOARDS, THIS TRANSLATES TO 480 ROCS PER NODE
The DC-DC/encoder board
EMBEDDED INDUCTORS MICRO
CARDS
TO CAPTAN CONNECTOR (SATA)
TO PSI46 ROCs BOARD- ANALOG (SATA)
TO PSI46 ROCs BOARD- DIGITAL
A3P250 FPGA
INDUCTOR BASED SWITCH STEP-DOWN
REGULATORS
LINEAR REGULATORS
ADC
JTAG
DC-DC STEP-DOWN BOARD
CAPACITOR SWITCH STEP-DOWN
REGULATORS
OR
EMBEDDED INDUCTORS MICRO CARDS
→ Ck ±→ Tki ±← Tko±→ Tr ±→ I2C ±→ R
◄ AOUT
TDMA -180MHZ
ADC_SAMPLETKOUT
01
V
LVDS (1.25)
I2c+reset TRG TK
20V
000001 1
t
V
TDMA - 180MHZLVDS (20.0)
How It Works
ADC, 105 Mbps
3.5
1.8V
2.5V2.5V
FPGA
SWITCHED REG BOARD
PSI ROC MODULE
Will be available in three weeks.
PINGA Software for CAPTAN Noise and Threshold Dispersion
• 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
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.
SIMULATION
• 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.
Next Steps