miun.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Detecting Cr Contamination In Water Using X-Ray Fluorescence
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. Deutsches Elektronen-Synchrotron (DESY). (Radiation Sensor Systems)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. (Radiation Sensor Systems)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. (Radiation Sensor Systems)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. (Radiation Sensor Systems)ORCID iD: 0000-0002-8325-5177
Show others and affiliations
2015 (English)In: 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, Institute of Electrical and Electronics Engineers (IEEE), 2015, 7581750Conference paper, Published paper (Other academic)
Abstract [en]

With the rapid growth in population and the overwhelming demand of industrial consumer products around the world, the amount of generated wastes is also increasing. Therefore, the optimal utilization of wastes and the waste management policies are very important in order to protect the environment[1]. The most common way of waste management is to dispose them into city dumps and landfills. These disposal sites may produce toxic and green house gases and also a substantial amount of leachate, which can affect the environment[2]. Leachate is liquid, which, while percolating through wastes in a landfill, extracts soluble and suspended solids. Leachate contains toxic and harmful substances, such as Chromium (Cr), Arsenic, Lead, Mercury, Benzene, Chloroform and Methylene Chloride, and can contaminate surface water and aquifers.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2015. 7581750
National Category
Engineering and Technology Health Sciences Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-26295DOI: 10.1109/NSSMIC.2015.7581750Scopus ID: 2-s2.0-84994225825Local ID: STCOAI: oai:DiVA.org:miun-26295DiVA: diva2:873492
Conference
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015; San Diego; United States; 31 October 2015 through 7 November 2015
Available from: 2015-11-24 Created: 2015-11-24 Last updated: 2017-03-02Bibliographically approved
In thesis
1. Advanced X-ray Detectors for Industrial and Environmental Applications
Open this publication in new window or tab >>Advanced X-ray Detectors for Industrial and Environmental Applications
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The new generation of X-ray free electron laser sources arecapable of producing light beams with billion times higherpeak brilliance than that of the best conventional X-ray sources.This advancement motivates the scientific community to pushforward the detector technology to its limit, in order to de-sign photon detectors which can cope with the extreme fluxgenerated by the free electron laser sources. Sophisticated ex-periments like deciphering the atomic details of viruses, filmingchemical reactions or investigating the extreme states of matterrequire detectors with high frame rate, good spatial resolution,high dynamic range and large active sensor area. The PERCI-VAL monolithic active pixel sensor is being developed by aninternational group of scientists in collaboration to meet theaforementioned detector requirements within the energy rangeof 250 eV to 1 keV, with a quantum efficiency above 90%.In this doctoral researchwork, Monte Carlo algorithm basedGeant4 and finite element method based Synopsys SentaurusTCADtoolkits have been used to simulate, respectively, theX-rayenergy deposition and the charge sharing in PERCIVAL. Energydeposition per pixel and charge sharing between adjacent pixelsat different energies have been investigated and presented.Novel methods for industrial and environmental applica-tions of some commercially available X-ray detectors have beendemonstrated. Quality inspection of paperboards by resolv-ing the layer thicknesses and by investigating orientation ofthe cellulose fibres have been performed using spectroscopicand phase-contrast X-ray imaging. It was found that, usingphase-contrast imaging it is possible to set burn-out like qualityindex on paperboards non-destructively. X-ray fluoroscopicmeasurements have been conducted in order to detect Cr inwater. This method can be used to detect Cr and other toxicelements in leachate in landfills and other waste dumping sites.

Abstract [sv]

Acceleratorbaserade röntgenkällor utvecklas ständigt, dessakan producera röntgenstrålning med miljarder gånger så högeffekttäthet som de starkaste konventionella röntgenkällorna.Därför finns en vetenskaplig utmaning att utveckla röntgende-tektorer som inte förstörs i de extrema flöden som genereras avdessa röntgenkällor. De visioner som finns för de nya källornaär t.ex.; att avbilda detaljer av virus ner på atomnivå, att filmakemiska reaktioner eller att undersöka extrema tillstånd hos ma-teria. Dessa typer av experiment kräver röntgendetektorer medhög bildhastighet, hög spatial upplösning och stort intensitets-omfång och stor aktiv sensoryta. Detektorsystemet PERCIVALsom bygger på aktiva pixlar med energiupplösning utvecklasinom ett internationellt vetenskapligt samarbetsprojekt. Må-let är att uppfylla detektorspecifikationerna för de nämndaexperimenten inom energiområdet 250 eV till 1 keV, med enkvantverkningsgrad över 90 %.I föreliggande vetenskapliga avhandlingsarbete har simule-ringar av energideponering i PERCIVAL-detektorn genomförtsbaserat på Monte Carlo-algoritmer och simuleringar av ladd-ningsdelning mellan pixlar har simulerats med hjälp av finitaelementmetoden. Därmed har energideponeringen per pixeloch laddningsdelningen mellan närliggande pixlar vid olikaenergier kunnat utredas och presenteras.I avhandlingen demonstreras nya lovande metoder för in-dustriella applikationer och miljöövervakning,därkommersiellttillgängliga röntgendetektorer kan användas. Kvalitetsövervak-ning av kartongtillverkning genom att mäta bestrykningstjock-lek och fiberorientering kan realiseras med energiupplöstaröntgenbilder eller faskontrastbilder i röntgenområdet. Det kankonstateras att med icke-förstörande provning, genom faskon-trastbilder, kan kvalitetsindexvärlden erhållas på samma sättsom kvalitetsindex kan erhållas från ”burn-out”-mätningar.Spektroskopiska mätningar av röntgenflourescens har genom-förts för att detektera krom (Cr) i vatten. Metodik för att detek-tera krom och andra giftiga metaller i lakvatten från deponioch annan lagring för giftigt avfall har utarbetats.

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2016. 159 p.
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 253
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-29264 (URN)STC (Local ID)978-91-88025-84-5 (ISBN)STC (Archive number)STC (OAI)
Public defence
2016-12-01, M108, Sundsvall, 10:15 (English)
Opponent
Supervisors
Available from: 2016-11-10 Created: 2016-11-10 Last updated: 2017-06-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Reza, SalimNorlin, BörjeFröjdh, ChristerThungström, Göran
By organisation
Department of Electronics Design
Engineering and TechnologyHealth SciencesNatural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 319 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf