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CMS Tracker Week – October 2003 – Patrick Gartung 1
Long Term Rod Testing in USLong Term Rod Testing in US
Patrick Gartung
University of California, Riverside
CMS Tracker Week – October 2003 – Patrick Gartung 2
Rod Acceptance TestingRod Acceptance Testing
• No electrical test done yet
• To readout frames you need to attach/detach hybrid
• Following example of TEC
• Rod is powered and connected to FEC
• I2C commands sent to optohybird to vary gain and bias
• Laser output is checked on oscilloscope
•Rod is unpacked and visually inspected for damage then placed in the assembly fixture
CMS Tracker Week – October 2003 – Patrick Gartung 3
Module installation testingModule installation testing
• Rod is powered and connected to DAQ
• The rod is biased and noise and calibration measurements are made to determine if any bonds were broken (as indicated by low noise and calibration response).
• Modules with broken bonds are replaced and the rod is retested.
• For double sided rods test after inner 6 modules are installed then install outer 6
•Modules are installed in the rod
CMS Tracker Week – October 2003 – Patrick Gartung 4
Long Term TestingLong Term Testing
• Rods are placed in test box, connected to the chiller, powered and connected to DAQ
• Rods are biased and thermal cycled for several days
• Periodic measurements are made with test software to determine any failures
• Chiller is controlled by independent interlock system which can communicate with test software on DAQ system.
CMS Tracker Week – October 2003 – Patrick Gartung 5
Single Rod Test StandSingle Rod Test Stand
•Work done by Jim Lamb (UCSB student) •Readout 1 SS or DS rod•Prototype set up at UCSB•Currently using XROD to take pedestals•Will thermal cycle rod with chiller control
OEC(12 channels)
Cold box with dry air
DAQ PC with 2 FED
chiller
CTRL adapter and cables
High voltage
(36 channels)
Low voltage
CMS Tracker Week – October 2003 – Patrick Gartung 6
Multi-rod test stand statusMulti-rod test stand status
• Prototype freezer moved from Rochester to Fermilab October 11.
• Second freezer will be shipped to UCSB early December.
• Designed and built an electronic circuit to command the coolant, vacuum and compressed air valves
• Allows a low current signal to completely control flow of coolant and the application of compressed air and vacuum
• Completed the automation of the procedure for loading and unloading of rods
• Work done by Ricardo Eusebi (Rochester student)• Labview VI running on interlock PC will guide user• User selects “install rods” and PC sets freezer in proper condition
• PC closes coolant valves and drains pipes• User is prompted to install rods and click “continue” • PC opens coolant valves and fills pipes
• After long term test user will select “remove rods” and the reverse procedure will be followed.
CMS Tracker Week – October 2003 – Patrick Gartung 7
Assembly diagnostic softwareAssembly diagnostic software
• Currently using XROD
• Quickly determine optohybrid gain and bias settings, FED timing and PLL timing
• Perform quick noise measurements to check for opens
CMS Tracker Week – October 2003 – Patrick Gartung 8
Long term test softwareLong term test software
• Lt is being extended to test modules on substructures
• Working with Wim Beamont to define settings for rods
• Will beta test on rod in the next few weeks
• Chiller control system listens on TCP port for set temperature commands from Lt
• Ability to read and record temperatures and currents for free
• Scripting of temperature change, voltage change and various tests for free
CMS Tracker Week – October 2003 – Patrick Gartung 9
Equipment needsEquipment needs
• To complete two single rod test stands• Need 1 TSC, 2 OEC (2nd OEC on motherboard)
• 2 OMUX crates with 4 mux cards each
• (Optional) 4 electrometers
• Short term for multi-rod test stands• 2 TSC, 2 FED, 2 FEC
• 2 OMUX crates with 4 mux cards each
• 4 OEC on 2 motherboards
• 2 CERN low voltage power supplies