A study of astrometric distortions due to “tree rings” in CCD sensors using LSST Photon Simulator
Abstract
Imperfections in the production process of thick CCDs lead to circularly symmetric dopant concentration variations, which in turn produce electric fields transverse to the surface of the fully depleted CCD that displace the photogenerated charges. We use PhoSim, a Monte Carlo photon simulator, to explore and examine the likely impacts these dopant concentration variations will have on astrometric measurements in LSST. The scale and behavior of both the astrometric shifts imparted to point sources and the intensity variations in flat field images that result from these doping imperfections are similar to those previously observed in Dark Energy Camera CCDs, giving initial confirmation of PhoSim's model for these effects. In addition, the organized shape distortions were observed as a result of the symmetric nature of these dopant variations, causing nominally round sources to be imparted with a measurable ellipticity either aligned with or transverse to the radial direction of this dopant variation pattern.
- Authors:
-
- Stony Brook Univ., Stony Brook, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1221750
- Report Number(s):
- BNL-108352-2015-JA
Journal ID: ISSN 1748-0221; KA2301020; TRN: US1500737
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Instrumentation
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 05; Journal ID: ISSN 1748-0221
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; CCD; tree rings; LSST; PhoSim
Citation Formats
Beamer, Benjamin, Nomerotski, Andrei, and Tsybychev, Dmitri. A study of astrometric distortions due to “tree rings” in CCD sensors using LSST Photon Simulator. United States: N. p., 2015.
Web. doi:10.1088/1748-0221/10/05/C05027.
Beamer, Benjamin, Nomerotski, Andrei, & Tsybychev, Dmitri. A study of astrometric distortions due to “tree rings” in CCD sensors using LSST Photon Simulator. United States. https://doi.org/10.1088/1748-0221/10/05/C05027
Beamer, Benjamin, Nomerotski, Andrei, and Tsybychev, Dmitri. Fri .
"A study of astrometric distortions due to “tree rings” in CCD sensors using LSST Photon Simulator". United States. https://doi.org/10.1088/1748-0221/10/05/C05027. https://www.osti.gov/servlets/purl/1221750.
@article{osti_1221750,
title = {A study of astrometric distortions due to “tree rings” in CCD sensors using LSST Photon Simulator},
author = {Beamer, Benjamin and Nomerotski, Andrei and Tsybychev, Dmitri},
abstractNote = {Imperfections in the production process of thick CCDs lead to circularly symmetric dopant concentration variations, which in turn produce electric fields transverse to the surface of the fully depleted CCD that displace the photogenerated charges. We use PhoSim, a Monte Carlo photon simulator, to explore and examine the likely impacts these dopant concentration variations will have on astrometric measurements in LSST. The scale and behavior of both the astrometric shifts imparted to point sources and the intensity variations in flat field images that result from these doping imperfections are similar to those previously observed in Dark Energy Camera CCDs, giving initial confirmation of PhoSim's model for these effects. In addition, the organized shape distortions were observed as a result of the symmetric nature of these dopant variations, causing nominally round sources to be imparted with a measurable ellipticity either aligned with or transverse to the radial direction of this dopant variation pattern.},
doi = {10.1088/1748-0221/10/05/C05027},
journal = {Journal of Instrumentation},
number = 05,
volume = 10,
place = {United States},
year = {Fri May 22 00:00:00 EDT 2015},
month = {Fri May 22 00:00:00 EDT 2015}
}
Web of Science
Works referenced in this record:
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journal, April 2014
- Peterson, J. R.
- Journal of Instrumentation, Vol. 9, Issue 04
Transverse electric fields' effects in the Dark Energy Camera CCDs
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Works referencing / citing this record:
Sensor Distortion Effects in Photon Monte Carlo Simulations
journal, February 2020
- Peterson, J. R.; O’Connor, P.; Nomerotski, A.
- The Astrophysical Journal, Vol. 889, Issue 2
Sensor Distortion Effects in Photon Monte Carlo Simulations
text, January 2020
- Peterson, J. R.; O'Connor, P.; Nomerotski, A.
- arXiv