Dept. Physics & Astronomy Space Research Group Nick Nelms Space Research Group Dept. Physics...

Dept. Physics & AstronomySpace Research Group

Nick NelmsSpace Research Group

Dept. Physics & AstronomyUniversity of Leicester

UK

GERB International Science Team22nd Meeting8-11-2004

GERB-4 Detector Report

Dept. Physics & AstronomySpace Research Group

GERB Detector System

Blackbody

IEU

SolarDiffuser

Front End Electronics

Focal Plane Assembly

Dept. Physics & AstronomySpace Research Group

GERB-4 Goldblack

Spectral Reflectance – repeatability results

0

5

10

15

20

25

0 5 10 15 20 25 30 35 40

Wavelength (um)

%R

Dept. Physics & AstronomySpace Research Group

GERB-4 Goldblack

Qualification

Successful testingBulk spectral absorptionPixel level spectral absorptionRadiation testSample vibration testDetector vibration testAccelerated life testStandard life testThermal cycle in airThermal cycle in N2

Thermal vacuum test

Dept. Physics & AstronomySpace 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-black Post-black Post-laser

Dept. Physics & AstronomySpace 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 & AstronomySpace 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 & AstronomySpace 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 & AstronomySpace Research Group

GERB-4 Detector calibration

Calibration facility schematic

Dept. Physics & AstronomySpace 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 & AstronomySpace 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

7 - 20 m