An improved sampling configuration for a coded aperture telescope

Jupp, Ian; Byard, Kevin; Dean, Anthony J.

doi:10.1016/0168-9002(94)90518-5

“…The 50kBq source has also been successfully z-Cleaned and the reconstructed flux of this source, which is actually positioned at a depth of 74.7cm is shared in roughly correct proportions between the planes either side of this depth, namely there is a large peak in the closest plane at 74cm and a smaller peak in the more distant plane at 76cm. The phenomenon of a single source being shared over more than a single pixel, or in this case a voxel, is also known as a phasing error [21] and has been discussed in the literature for sources lying close to object pixel boundaries in the (x, y) directions [22]. In this case we have similar phasing error occurring but this time over more than one voxel in the z direction.…”

Section: Continuous Detector Resultsmentioning

confidence: 94%

Application of the CLEAN algorithm to three dimensional coded aperture imaging

Byard

¹

2021

Nuclear Instruments and Methods in Physics Research Section A:

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Preprint submitted to ElsevierSeptember 30, 2020 ratio (SNR) of the sources. For the strongest source and using the continuous detector the SNR increases unexpectedly to give values higher than that for observations made only in the critical plane due to the ghosting of this source in other planes at different depths. For all other cases there is a decrease in SNR which is more marked for finer plane separations and for weaker sources.

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“…The exact ratio between detector spatial resolution and mask element size has an important effect on the S/N in the reproduced image. 23,24 For a fixed mask element size, improved spatial resolution results in an improvement in the imaging S/N. It has been shown 24 that , to optimize the S/N using discrete detector elements, the mask element size (in both x and y) should be ∼ 1.5 times larger than the detector spatial resolution.…”

Section: Coded Aperture Imagingmentioning

confidence: 99%

CASTER: a concept for a Black Hole Finder Probe based on the use of new scintillator technologies

McConnell

¹

,

Bloser

²

,

Case

³

et al. 2005

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The primary scientific mission of the Black Hole Finder Probe (BHFP), part of the NASA Beyond Einstein program, is to survey the local Universe for black holes over a wide range of mass and accretion rate. One approach to such a survey is a hard X-ray coded-aperture imaging mission operating in the 10-600 keV energy band, a spectral range that is considered to be especially useful in the detection of black hole sources. The development of new inorganic scintillator materials provides improved performance (for example, with regards to energy resolution and timing) that is well suited to the BHFP science requirements. Detection planes formed with these materials coupled with a new generation of readout devices represent a major advancement in the performance capabilities of scintillator-based gamma cameras. Here, we discuss the Coded Aperture Survey Telescope for Energetic Radiation (CASTER), a concept that represents a BHFP based on the use of the latest scintillator technology.

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“…The exact ratio between detector spatial resolution and mask element size has an important effect on the S/N in the reproduced image. 30,31 For a fixed mask element size, improved spatial resolution results in an improvement in the imaging S/N. Jupp et al 31 showed that, to optimize the S/N using discrete detector elements, the mask element size (in both x and y) should be ~1.5 times larger than the detector spatial resolution.…”

Section: Coded Aperture Imagingmentioning

confidence: 99%

“…30,31 For a fixed mask element size, improved spatial resolution results in an improvement in the imaging S/N. Jupp et al 31 showed that, to optimize the S/N using discrete detector elements, the mask element size (in both x and y) should be ~1.5 times larger than the detector spatial resolution. This implies a detector spatial resolution (1 ) of 0.9-1.5 mm in both x and y after correcting for parallax (cross-talk) effects.…”

Section: Coded Aperture Imagingmentioning

confidence: 99%

CASTER: a scintillator-based black hole finder probe

Pačiesas

¹

,

Case

²

,

Cherry

³

et al. 2004

UV and Gamma-Ray Space Telescope Systems

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The primary scientific mission of the Black Hole Finder Probe (BHFP), part of the NASA Beyond Einstein program, is to survey the local Universe for black holes over a wide range of mass and accretion rate. One approach to such a survey is a hard X-ray coded-aperture imaging mission operating in the 10-600 keV energy band, a spectral range that is considered to be especially useful in the detection of black hole sources. The development of new inorganic scintillator materials provides improved performance (for example, with regards to energy resolution and timing) that is well suited to the BHFP science requirements. Detection planes formed with these materials coupled with a new generation of readout devices represent a major advancement in the performance capabilities of scintillator-based gamma cameras. Here, we discuss the Coded Aperture Survey Telescope for Energetic Radiation (CASTER), a concept that represents a BHFP based on the use of the latest scintillator technology.

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An improved sampling configuration for a coded aperture telescope

Cited by 9 publications

References 7 publications

Application of the CLEAN algorithm to three dimensional coded aperture imaging

Application of the CLEAN algorithm to three dimensional coded aperture imaging

CASTER: a concept for a Black Hole Finder Probe based on the use of new scintillator technologies

CASTER: a scintillator-based black hole finder probe

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