Module Bench Tests CMS Pixel Upgrade Workshop, Aug, 2012 University of Puerto Rico – Mayaguez Alejandro Carlo Joseph Cordero Angel López University of Kansas Gemma Tinti Alice Bean University of Nebraska José Lazo-Flores Paul Scherrer Institute Wolfram Erdmann

Two projects Thermal Paste Performance Analog Current, Threshold and Risetime Changes with Temperature Module Bench Tests2 CMS Pixel Upgrade Workshop, Aug, 2012

Module Bench Tests3 CMS Pixel Upgrade Workshop, Aug, 2012

Thermal Test Setup CMS Pixel Upgrade Workshop, Aug, 2012 Module Bench Tests4 Thermal Paste Carbon Fiber Support

Module Bench Tests5 CMS Pixel Upgrade Workshop, Aug, 2012

4 wire Resistance Measurement Module Bench Tests6 CMS Pixel Upgrade Workshop, Aug, 2012

RTD Calibration Module Bench Tests7 CMS Pixel Upgrade Workshop, Aug, 2012

Leakage Current vs Temperature Module Bench Tests8 CMS Pixel Upgrade Workshop, Aug, Bias Voltage = 80 V

Seven Temperatures Cold box RTD – kept at 10 C. One RTD on the carbon fiber support Three RTDs along base strip One RTD attached to top of module Module temperature determined from leakage current Module Bench Tests9 CMS Pixel Upgrade Workshop, Aug, 2012

Module Bench Tests10 Temperature vs Power Without Thermal Grease CMS Pixel Upgrade Workshop, Aug, 2012

Module Bench Tests11 Temperature vs Power With Thermal Paste CMS Pixel Upgrade Workshop, Aug, 2012

Module Test Setup at PSI Module Bench Tests12 CMS Pixel Upgrade Workshop, Aug, 2012

Module Bench Tests13 CMS Pixel Upgrade Workshop, Aug, 2012

Module Bench Tests14 CMS Pixel Upgrade Workshop, Aug, 2012

Risetime Constant vs Temperature for I ana = 24 mA Module Bench Tests15 CMS Pixel Upgrade Workshop, Aug, 2012

Faster Risetime with Larger I ana Module Bench Tests16 CMS Pixel Upgrade Workshop, Aug, 2012

Conclusions Thermal paste very effective in reducing sensor temperature. Threshold and risetime do not change with temperature if V ana is adjusted to control I ana. If V ana is kept constant, I ana and threshold rise linearly with temperature while the risetime is reduced. Module Bench Tests17 CMS Pixel Upgrade Workshop, Aug, 2012