Test set up description and performances for HAWAII-2RG detector characterization at ESTEC

摘要

In the frame work of the European Space Agency's Cosmic Vision program, the Euclid mission has the objective to mapthe geometry of the Dark Universe. Galaxies and clusters of galaxies will be observed in the visible and near-infraredwavelengths by an imaging and spectroscopic channel.For the Near Infrared Spectrometer instrument (NISP), the state-of-the-art HAWAII-2RG detectors will be used,associated with the SIDECAR ASIC readout electronic which will perform the image frame acquisitions.To characterize and validate the performance of these detectors, a test bench has been designed, tested and validated.This publication describes the pre-tests performed to build the set up dedicated to dark current measurements and testsrequiring reasonably uniform light levels (such as for conversion gain measurements). Successful cryogenic and vacuumtests on commercial LEDs and photodiodes are shown. An optimized feed through in stainless steel with a V-groove topot the flex cable connecting the SIDECAR ASIC to the room temperature board (JADE2) has been designed and tested.The test set up for quantum efficiency measurements consisting of a lamp, a monochromator, an integrating sphere andset of cold filters, and which is currently under construction will ensure a uniform illumination across the detector withvariations lower than 2%.A dedicated spot projector for intra-pixel measurements has been designed and built to reach a spot diameter of 5 μm at920nm with 2nm of bandwidth [1].© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.