Conveners
Detector Measurements/Models 2
- Elizabeth George (ESO)
For low flux Short Wave Infrared detection in astronomy, focal plane arrays are usually based on an HgCdTe detection layer flip-chipped onto a Silicon ROIC. To meet the low noise specification on these detectors, Source Follower per Detector (SFD) pixel architecture is maximizing the conversion gain, thus reducing the ROIC noise. However, this architecture gives intrinsically a non-linear...
Persistence is the effect whereby a remnant signal from a previous exposure is imprinted on a subsequent image. This effect has long been known to affect HgCdTe near-infrared detectors and, if severe, the persistence artefacts can last several hours or even days, rendering subsequent observations nearly useless. Historically, ESO has addressed persistence by strongly limiting the exposure...
In the baseline operating mode, flat-field images taken with the 16-channel, 16 Mpix Teledyne-e2v CCD sensors of the LSST camera exhibit tearing, and other related effects caused by lateral distortions in the sensor drift field. These particular distortions are explained by the non-uniform distribution of holes in the channel stops between sensor columns, which has been modelled. After...
