Dept. Physics & Astronomy Space Research Group Nick Nelms Space Research Group Dept. Physics & Astronomy University of Leicester UK GERB International Science Team 22 nd Meeting GERB-4 Detector Report

Dept. Physics & Astronomy Space Research Group GERB Detector System Blackbody IEU Solar Diffuser Front End Electronics Focal Plane Assembly

Dept. Physics & Astronomy Space Research Group GERB-4 Goldblack Spectral Reflectance – repeatability results

Dept. Physics & Astronomy Space Research Group 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 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-blackPost-blackPost-laser

Dept. Physics & Astronomy Space Research Group GERB-4 Flight detector programme status 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

Dept. Physics & Astronomy Space Research Group GERB-4 FPA Status 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

Dept. Physics & Astronomy Space Research Group GERB-4 Detector System Schedule 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.

Dept. Physics & Astronomy Space Research Group GERB-4 Detector calibration Calibration facility schematic

Dept. Physics & Astronomy Space Research Group GERB-4 Detector calibration Calibration facility All components in-house including calibrated reference detectors (Si diode, pyroelectric) First-light expected w/b 22/11/04

Dept. Physics & Astronomy Space Research Group 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  m