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

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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

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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.

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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

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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.

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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

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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

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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