Operation and performance of new NIR detectors from SELEX
2012
The European Space Agency (ESA) has funded SELEX Galileo, Southampton, UK to develop large format near infrared
(NIR) detectors for its future space and ground based programmes. The UKATC has worked in collaboration with
SELEX Galileo to test and characterise the new detectors produced during phase-1 of the development. In order to
demonstrate the detector material performance, the HgCdTe (MCT) detector diodes (grown on GaAs substrate through
MOVPE process in small 320×256, 24μm pixel format) are hybridised to the existing SELEX Galileo SWALLOW
CMOS readout chip. The substrate removed and MCT thinned detector arrays were then tested and evaluated at the
UKATC following screening tests at SELEX. This paper briefly describes the test setup, the operational aspects of the
readout multiplexer and presents the performance parameters of the detector arrays including: conversion gain, detector
dark current, read noise, linearity, quantum efficiency and persistence for various detector temperatures between 80K
and 140K.
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