Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Jens Hovgaard"'
Autor:
Chuanlei Liu, Patrick R.B. Saull, Nicolas Martin-Burtart, Jens Hovgaard, Ed Korpach, Christopher Tulk, Kurt Ungar, Weihua Zhang
Publikováno v:
Journal of Environmental Radioactivity. :107009
The environmental radiation exposure in Canada has been monitored since 2002 by Health Canada's Fixed Point Surveillance network. The network consists of over eighty 7.6 cm × 7.6 cm sodium iodide spectrometers, and routinely reports to the public th
Autor:
Jens Hovgaard, Flaviu Stanescu, Nathan Murtha, Rodger Mantifel, Patrick R.B. Saull, Brian Le Gros, P. L. Drouin, Laurel E. Sinclair, Guy Jonkmans, Audrey M. L. MacLeod, Ian Summerell, Stephen Monkhouse, Andrew McCann, Christian V.O. Ouellet
The Silicon photomultiplier-based Compton Telescope for Safety and Security (SCoTSS) has been developed incorporating end-user requirements into the design process. The end-user group includes those responsible for mobile survey in the event of a rad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bb85f90de62787decdbec3ed18b3e24
http://arxiv.org/abs/2001.03638
http://arxiv.org/abs/2001.03638
Autor:
Richard Fortin, Laurel E. Sinclair, P. L. Drouin, Blake Beckman, Audrey M.L. MacLeod, Rodger Mantifel, J L Buckle, Jens Hovgaard, Maurice J. Coyle, Andrew McCann, Christian Van Ouellet, Reid A. Van Brabant, Bohdan Krupskyy, P.R.B. Saull, Carolyn M. Chen, Blaine Fairbrother
The SiPM-based Compton Telescope for Safety and Security (SCoTSS) has been developed with inorganic crystalline scintillator material for gamma detection. The instrument is sensitive enough to be used in a mobile survey mode, accumulating energy depo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8adfe35045140c07aa4748ce5bf9f99
Autor:
Jens Hovgaard, Lorne Erhardt, D. Waller, Laurel E. Sinclair, Andrew McCann, Bohdan Krupskyy, P.R.B. Saull, P. L. Drouin, Ryuichi Ueno, Audrey M. L. MacLeod
Publikováno v:
2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD).
We present the development of a mobile survey spectrometer and fieldable Compton gamma-ray imager. The detector employs CsI(Tl) scintillator coupled to SensL silicon photomultipliers (SiPMs) and incorporates a unique modular design, where individual
Publikováno v:
Applied Radiation and Isotopes. 64:948-956
Calibration of carborne gamma-ray spectrometry systems for 137 Cs is carried out with a source successively placed at 791 positions within an area of 34 m×62 m. A computer model supplements the measurements. Hereby a sensitivity map for a surface co
Autor:
Jens Hovgaard, Brian Minty
Publikováno v:
Exploration Geophysics. 33:172-176
Statistical methods for removing noise from multichannel spectra are now routinely applied in gamma-ray spectrometry. The two methods in common use are the Noise Adjusted Singular Value Decomposition (NASVD) method and the Maximum Noise Fraction (MNF
Publikováno v:
Applied Radiation and Isotopes. 51:651-662
A new technique for processing airborne gamma ray spectrometry data has been developed. It is based on the noise adjusted singular value decomposition method introduced by Hovgaard in 1997. The new technique opens for mapping of very low contaminatio
Autor:
Jens Hovgaard, Stephen D. Billings
Publikováno v:
GEOPHYSICS. 64:1378-1392
A geometrical detector model of airborne gamma‐ray spectrometry is presented for data acquired using a rectangular detector of arbitrary dimensions. The detector response is modeled by calculating variations in solid angle and detector thickness fo
Publikováno v:
Radiation Protection Dosimetry. 73:225-230
On 29 April 1986, the Geological Survey of Finland (GSF) survey aircraft with a gamma ray spectrometer flew through a radioactive plume from the Chernobyl nuclear accident. As the aircraft flew through the plume, the aircraft became increasingly cont
Autor:
Marian Scott, Jens Hovgaard
Publikováno v:
Radiation Protection Dosimetry. 73:219-223
Within the framework of the Nordic Nuclear Safety Research programme (NKS), RESUME-95 (Rapid Environmental Surveying Using Mobile Equipment) took place in Finland in August 1995. Amongst the purposes of the exercise were: (1) to test the ability of e