Characterization of HAWAII-2RG detector and SIDECAR ASIC for the Euclid mission at ESA

Crouzet, Pierre-Elie; Haar, J. ter; Wit, F. de; Beaufort, T.; Bütler, B.; Smit, Hans; Luijt, Cornelis van der; Martin, D.

doi:10.1117/12.924968

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Failure to account for IPC results in underestimation of conversion gain (Crouzet et al 2012;Moore et al 2006;Fox et al 2009) and overestimation of various kinds of quantum efficiencies (DQE;McCullough et al 2007). Thus, IPC must be estimated and accounted for in order to understand the fundamental parameters of the detectors.…”

Section: Implications Of Ipcmentioning

confidence: 99%

The Impact of Interpixel Capacitance in CMOS Detectors on PSF Shapes and Implications for WFIRST

Kannawadi

Shapiro

Mandelbaum

et al. 2016

PASP

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Unlike optical CCDs, near-infrared detectors, which are based on CMOS hybrid readout technology, typically suffer from electrical crosstalk between the pixels. The interpixel capacitance (IPC) responsible for the crosstalk affects the point-spread function (PSF) of the telescope, increasing the size and modifying the shape of all objects in the images while correlating the Poisson noise. Upcoming weak lensing surveys that use these detectors, such as WFIRST, place stringent requirements on the PSF size and shape (and the level at which these are known), which in turn must be translated into requirements on IPC. To facilitate this process, we present a first study of the effect of IPC on WFIRST PSF sizes and shapes. Realistic PSFs are forward-simulated -2 -from physical principles for each WFIRST bandpass. We explore how the PSF size and shape depends on the range of IPC coupling with pixels that are connected along an edge or corner; for the expected level of IPC in WFIRST, IPC increases the PSF sizes by ∼5%. We present a linear fitting formula that describes the uncertainty in the PSF size or shape due to uncertainty in the IPC, which could arise for example due to unknown time evolution of IPC as the detectors age or due to spatial variation of IPC across the detector. We also study of the effect of a small anisotropy in the IPC, which further modifies the PSF shapes. Our results are a first, critical step in determining the hardware and characterization requirements for the detectors used in the WFIRST survey.

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Section: Implications Of Ipcmentioning

confidence: 99%

The Impact of Interpixel Capacitance in CMOS Detectors on PSF Shapes and Implications for WFIRST

Kannawadi

Shapiro

Mandelbaum

et al. 2016

PASP

View full text Add to dashboard Cite

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“…One is relation between input voltage and output counts at ADC. Crouzet et al (2012) 9 shows the behavior of this relation, which is affected by preamp Gain setting and bias/reference voltages. The other is relation between input photon number and output voltage at detector, which is affected by properties of pixel photodiode and bias voltage.…”

Section: Linearitymentioning

confidence: 99%

Optimization and performance of H2RG detectors and SIDECAR ASICs for SWIMS

et al. 2014

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SWIMS (Simultaneous-color Wide-field Infrared Multi-object Spectrograph) is one of the first-generation instruments for the University of Tokyo Atacama Observatory 6.5-m telescope which is now under construction in northern Chile. This instrument incorporates 4 (and maximum 8 in future) HgCdTe HAWAII-2RG detectors, from which images are acquired by SIDECAR ASICs. Characterization and validation of performances of these detectors are carried out using a test dewar at 80K using liquid nitrogen. Bias voltages such as reset level and substrate level and reference voltages are optimized to minimize readout noise with keeping output levels within proper range for ADC inputs. ADU-electron conversion gain g c is measured by photon-transfer method, incorporating IPC (Inter-Pixel Capacitance) correction. IPC coefficient is measured to be about 1.4%, which result in overestimation of g c by about 13%. After this correction, g c is measured to be about 2.4 e − /ADU with normal preamplifier gain setting in the ASICs. Correlated double sampling (CDS) readout noise is about 16 e − rms, and is reduced to about 4 e − rms by Multi Fowler sampling. The noise is different by 30% at most between channels of the ASIC. We also separate noise sources into those come from detector pixels, from a flat cable between the detector and the ASIC, and from preamps and from ADCs, and found that the detector pixels are the major sources of readout noise. Fitting of linearity curve is also obtained. The next step is to study the effects of driving multiple detectors to the performances and to install the detectors into SWIMS.

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“…• The HAWAII testing 39,44 initiated during the assessment phase of Euclid have progressed slowly but should reach soon a cruising speed. The tests are focused on remanence and sub-pixel response impact on photometry.…”

Section: Projects In Implementationmentioning

confidence: 99%

European Space Agency detector development for space science: present and future activities

et al. 2014

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We report on the present and future detector development activities for the European Space Agency Science Programme. The development of European technology in that field is a key mission enabler for the program, which requires TRL6 (ISO scale) by end of the definition phase, so called "mission adoption". This is particularly true for Astronomy and fundamental physics type missions. Current activities are in particular targeting large format and p-channel CCD, NIR and MWIR, LWIR wavelength ranges as well as related ASIC controller. For the longer term future mission plan (so called M4, M5 and L2 missions, M3 being PLATO and L1 JUICE), the extreme ends of the spectrum will be addressed. An overview of the detector status for the Earth Observation program is given in appendix, as most of the technologies are directly applicable to some extent to science missions, in particular for Planetary missions. The specific validation activities in place in the future mission preparation office in support to the space science program will be eventually briefly detailed.

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Characterization of HAWAII-2RG detector and SIDECAR ASIC for the Euclid mission at ESA

Cited by 8 publications

References 3 publications

The Impact of Interpixel Capacitance in CMOS Detectors on PSF Shapes and Implications for WFIRST

The Impact of Interpixel Capacitance in CMOS Detectors on PSF Shapes and Implications for WFIRST

Optimization and performance of H2RG detectors and SIDECAR ASICs for SWIMS

European Space Agency detector development for space science: present and future activities

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