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Barrel Pixel Qualification

This document outlines the qualification test for pixel modules, including the testing apparatus, code installation, grading criteria, examples, results, and current goals.

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Barrel Pixel Qualification

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  1. Barrel Pixel Qualification Dan Crisp October 15, 2010 dcrisp2@gmail.com

  2. Outline • The Qualification Test • Testing Apparatus • Getting the code to work • Grading Criteria • Examples • Results and Tested Modules • Current Goals dcrisp2@gmail.com

  3. The Qualification Test • I-V Curve • Pixel Address Test • Thermal Cycling • Noise • Pixel Test • Trimming • Trim Bit Test • Gains & Pedestals • Bump-Bonding Test dcrisp2@gmail.com

  4. Test Apparatus • Testboards • Gatekeeper • Modules • Coldbox (JUMO) • Keithley • Dual Serial Port • PC with SLC5 dcrisp2@gmail.com

  5. Working with the Code • Clean Install with CERN’s SLC5 • Psi46expert from ModuleTestSL5.tar • ROOT 5.22 • Shared library and Permission Problems • Rename devices dcrisp2@gmail.com

  6. Defects per Chip A:<1% B:<4% C:>4% A*: A if mask defects B*: B if mask defects Qualification Param. Noise(e-) 500<B<1000 Vcal Threshold Width 200e-<B<400e- Rel. Gain Width 10%<B<20% Pedestal Spread 2500e-<B<5000e- Grading Criteria dcrisp2@gmail.com

  7. dcrisp2@gmail.com

  8. dcrisp2@gmail.com

  9. Results & Tested Modules • Out of the 11 we had been able to test, there has been four A, two B and five C rated modules • Two others failed their DTLscans and are unusable • Some bugs still exist with the executing of the supervisor code dcrisp2@gmail.com

  10. Current Goals • Getting our new computer set up for use with our expected X-Ray box • Versions of OS, psi46expert, and other software • Getting it in the network • Fixing Problems with our old one • Psi46expert isn’t compiling • Problem figuring out SU password dcrisp2@gmail.com

  11. dcrisp2@gmail.com

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