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Long Term Rod Testing in US

Long Term Rod Testing in US. Patrick Gartung University of California, Riverside. Rod 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

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Long Term Rod Testing in US

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  1. Long Term Rod Testing in US Patrick Gartung University of California, Riverside

  2. Rod 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

  3. Module 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

  4. Long 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.

  5. Single Rod Test Stand OEC (12 channels) DAQ PC with 2 FED CTRL adapter and cables Cold box with dry air chiller • 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 High voltage (36 channels) Low voltage

  6. Multi-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.

  7. Assembly 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

  8. Long 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

  9. Equipment 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

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