Measurements of charge diffusion in deep-depletion CCDs by optical diffraction

Cease, H.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Scarpine, V.

doi:10.1007/s10686-007-9081-6

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…5. This measurement done with X-rays is consistent with measurements done with optical methods on the same detectors [22], and on other thick detectors developed by LBNL [24] [25].…”

Section: High Resistivity Ccd Detectorssupporting

confidence: 85%

Prospects for a direct dark matter search using high resistivity CCD detectors

Estrada,

Cease,

Diehl

et al. 2008

Preprint

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The possibility of using CCD detectors in a low threshold direct detection dark matter search experiment is discussed. We present the main features of the DECam detectors that make them a good alternative for such an experiment, namely their low noise and their large depleted volume. The performance of the DECam CCDs for the detection of nuclear recoils is discussed, and a measurement of the ionization efficiency for these events is presented. Finally the plans and expected reach for the CCD Experiment at Low Background (CELB) are discussed.

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“…5. This measurement done with X-rays is consistent with measurements done with optical methods on the same detectors [22], and on other thick detectors developed by LBNL [24] [25].…”

Section: High Resistivity Ccd Detectorssupporting

confidence: 85%

Prospects for a direct dark matter search using high resistivity CCD detectors

Estrada,

Cease,

Diehl

et al. 2008

Preprint

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“…plated Invar pedestal or "foot" that had two alignment/ mounting pins pressed into it. In all cases the glue used in assembly was Epotek 301-2, which was found suitable for this work because of its low viscosity and good cryogenic properties (Cease et al 2006). A CCD flatness measurement, which involved a time-consuming surface scan of the CCDs at operating temperature, was performed on a small sample of the devices.…”

Section: Packaging and Testing 2048 × 4096 Imaging Ccdsmentioning

confidence: 99%

“…If the CCD did not pass these criteria, it was removed from the sample of possible science-grade CCDs, so it was not studied further. The second-stage tests required more significant manual setup and included determination of the charge diffusion using X-rays and a testpattern (Cease et al 2008b), chargetransfer efficiency, and dark current and QE as a function of temperature during the warm-up. All of the CCD modules were inspected for thickness and flatness using an optical microscope at room temperature.…”

Section: Packaging and Testing 2048 × 4096 Imaging Ccdsmentioning

confidence: 99%

The Dark Energy Camera

Flaugher¹,

Diehl²,

Honscheid³

et al. 2015

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The Dark Energy Camera is a new imager with a 2°. 2 diameter field of view mounted at the prime focus of the Victor M. Blanco 4m telescope on Cerro Tololo near La Serena, Chile. The camera was designed and constructed by the Dark Energy Survey Collaborationand meets or exceeds the stringent requirements designed for the widefield and supernova surveys for which the collaboration uses it. The camera consists of a five-element optical corrector, seven filters, a shutter with a 60 cm aperture, and a charge-coupled device (CCD) focal plane of 250 μm thick fully depleted CCDs cooled inside a vacuum Dewar. The 570 megapixel focal plane comprises 62 2k × 4k CCDs for imaging and 12 2k × 2k CCDs for guiding and focus. The CCDs have 15 μm × 15 μm pixels with a plate scale of 0 263 pixel −1. A hexapod system provides state-of-the-art focus and alignment capability. The camera is read out in 20 s with 6-9 electronreadout noise. This paper provides a technical description of the cameraʼs engineering, construction, installation, and current status.

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“…We developed a new technique [10] to measure charge diffusion based on Fourier analysis of the spatial resolution of a double slit diffraction pattern as the substrate voltage is varied. We measured the diffusion vs. substrate voltage in several 2k x 2k CCDs.…”

Section: Charge Diffusionmentioning

confidence: 99%

Characterization of DECam focal plane detectors

et al. 2008

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DECam is a 520 Mpix, 3 square-deg FOV imager being built for the Blanco 4m Telescope at CTIO. This facility instrument will be used for the "Dark Energy Survey" of the southern galactic cap. DECam has chosen 250 µm thick CCDs, developed at LBNL, with good QE in the near IR for the focal plane. In this work we present the characterization of these detectors done by the DES team, and compare it to the DECam technical requirements. The results demonstrate that the detectors satisfy the needs for instrument.

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Measurements of charge diffusion in deep-depletion CCDs by optical diffraction

Cited by 7 publications

References 4 publications

Prospects for a direct dark matter search using high resistivity CCD detectors

Prospects for a direct dark matter search using high resistivity CCD detectors

The Dark Energy Camera

Characterization of DECam focal plane detectors

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