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Experimental study ...
Experimental study of background subtraction in Digital Cherenkov Viewing Device measurements
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- Branger, Erik, 1988- (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Grape, Sophie, 1982- (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Jansson, Peter, 1971- (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Jacobsson Svärd, Staffan, 1970- (författare)
- Uppsala universitet,Tillämpad kärnfysik
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(creator_code:org_t)
- 2018
- 2018
- Engelska.
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Ingår i: Journal of Instrumentation. - 1748-0221 .- 1748-0221. ; 13:8
- Relaterad länk:
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Digital Cherenkov Viewing Device (DCVD) is an imaging tool used by authority inspectors for partial defect verification of nuclear fuel assemblies in wet storage, i.e. to verify that part of an assembly has not been diverted. One of the currently adopted verification procedures is based on quantitative measurements of the assembly's Cherenkov light emissions, and comparisons to an expected intensity, calculated based on operator declarations. A background subtraction of the intensity data in the recorded images is necessary for accurate quantitative measurements. The currently used background subtraction is aimed at removing an electronics-induced image-wide offset, but it is argued here that the currently adopted procedure may be insufficient.It is recommended that a standard dark-frame subtraction should be used, to remove systematic pixel-wise background due to the electronics, replacing the currently used offset procedure. Experimental analyses show that a dark-frame subtraction would further enhance the accuracy and reliability of DCVD measurements. Furthermore, should ageing of the CCD chip result in larger systematic pixel-wise deviations over time, a dark-frame subtraction can ensure reliable measurements regardless of the age of the CCD chip. It can also help in eliminating any adverse effects of malfunctioning pixels. In addition to the background from electronic noise, ways to compensate for background from neighbouring fuel assemblies and ambient light are also discussed.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Nuclear safeguards
- Cherenkov light
- DCVD
- Nuclear fuel
- Physics with specialization in Nuclear Physics
- Fysik med inriktning mot kärnfysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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