Dept. Physics & Astronomy Space Research Group GERB International Science Team 22 nd Meeting 8 -11 -2004 GERB-4 Detector Report Nick Nelms Space Research Group Dept. Physics & Astronomy University of Leicester UK
GERB Detector System IEU Blackbody Dept. Physics & Astronomy Space Research Group Front End Electronics Solar Diffuser Focal Plane Assembly
GERB-4 Goldblack Dept. Physics & Astronomy Space Research Group Spectral Reflectance – repeatability results
GERB-4 Goldblack Qualification Successful testing Bulk spectral absorption Pixel level spectral absorption Radiation test Sample vibration test Detector vibration test Accelerated life test Standard life test Thermal cycle in air Thermal cycle in N 2 Thermal vacuum test Dept. Physics & Astronomy Space Research Group
GERB-4 Goldblack Dept. Physics & Astronomy Space Research Group Flight detector blacking Strip deposition followed by laser reticulation selected as flight blacking method – No mis-alignment of blacking on pixels Improved pixel profile Pre-black Post-laser
GERB-4 Flight detector programme status Dept. Physics & Astronomy Space Research Group 19 un-blacked flight detectors selected from Wafer 31 Detector level spectral reflectance measurements consistent with substrate level measurements First batch (6 off) of flight detectors successfully produced Blacking of second batch starts w/b 08/11
GERB-4 FPA Status Dept. Physics & Astronomy Space Research Group Silicon substrates – in house, inspected ASICs – in-house, tested and qualified Ceramic substrates – in-house, inspected Molybdenum backplates – in house Cover plates – in house Connector substrates – in house, inspected, tested
GERB-4 Detector System Schedule Dept. Physics & Astronomy Space Research Group Front End Electronics build completed, tested, coated and qualified. Blackbody test at AEAT required – still to be scheduled. Harness – complete and tested – bake-out in November. FPA assembly due to begin w/b 08/11/04. FPA calibration begins Jan 05.
GERB-4 Detector calibration Calibration facility schematic Dept. Physics & Astronomy Space Research Group
GERB-4 Detector calibration Dept. Physics & Astronomy Space Research Group Calibration facility All components in-house including calibrated reference detectors (Si diode, pyroelectric) First-light expected w/b 22/11/04
Detector calibration Calibration aims Relative spectral response measurements 0. 2 m interval 0. 3 – 3. 5 m 0. 5 m interval 3. 5 – 7. 0 m 1 m interval 7 - 20 m Dept. Physics & Astronomy Space Research Group
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